Hee-Jong Seo

The Sloan Digital Sky Survey (SDSS IV) - eBOSS (The Extended baryon Oscillation Spectroscopic Survey), Tiling coordinator for eBOSS, SDSS-IV architect.

Astrophysical Institute (ApI)

Courses Taught

Undergraduate: Introduction to Physics: you can explain many of the everyday physical phenomena if you take this course *well*, Kinematics, Newton's laws, circular motions, fluids, thermodynamics; Fundamentals of Astrophysics: Introduction to celestial Mechanics, stellar astrophysics, telescope, galaxies, cosmology

Undergraduate/Graduate: Interstellar Medium and Galaxies: An advanced lecture focusing on galaxies and cosmology

Research Interests

Precision cosmology with large-scale structure: galaxy surveys, cosmic shear, 21cm surveys, Deep learning for galaxy surveys

My research interests are in high precision cosmology with large scale structure. I study the distributions of galaxies and matter on very large scales to infer how our Universe has expanded, what our Universe is composed of, and therefore to collect observational clues to identify dark energy and dark matter, which together makes up 95% of Universe while still being quite mysterious.

The main topics of my work involve the detection of the Baryon Acoustic Oscillations (BAO) from the large scale structure of galaxies and matter. This feature was formed in the very early, hot Universe by the sound waves propagated in the plasma of photons and baryons due to the interaction between photon pressure and gravity. The propagating sound waves have been frozen near the epoch of so called 'Recombination' when the baryons and photons are effectively separated.

The current distribution of galaxies and matter still trace the imprint of this primordial sound saves on very large scales. The true size of this feature is known quite accurately; therefore, by comparing the observed size and the known true size, we can estimate the distance to various cosmic epochs. This relation of distance to cosmic epoch encodes the expansion history of the Universe and therefore the properties of dark energy that drives the expansion faster and faster.

The enormous size of this feature (~0.5 billion light years) requires very large galaxy surveys, such as Baryon Oscillations Spectroscopic Survey (BOSS) which has been completed, producing a series of papers recently (https://sdss3.org//science/boss_publications.php), eBOSS (extended BOSS) which is ongoing , Dark Energy Spectroscopic Instrument (DESI) which will start in 2018.

I have been and am actively involved in all these missions.

Along with the BAO features, these surveys also intend to study the large scale streams of the galaxies (i.e, galaxies move around) to study the nature of Gravity, dark matter, and dark energy. My work involves various methods of analyzing the large scale structure of galaxies and matter, including analytical, numerical, observational studies, as a dark energy probe. I am also interested in relating observed galaxies to the underlying dark matter halo distributions, finding the upper limit on neutrino mass using the large scale structure, weak gravitational lensing signal of the dark matter distribution.

At a Glance

A complete FFT-based decomposition formalism for the redshift-space bispectrum. Sugiyama, N.~S., Saito, S., Beutler, F., & Seo, H.-J. 2018, arXiv:1803.02132

Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys. Ding, Z., Seo, H.-J., Vlah, Z., et al. 2018, MNRAS, 479, 1021

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample. Alam, S., et al. 2017, MNRAS, 470, 2617

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space. Beutler, F., Seo., H.-J., Ross, A., et al. 2017 MNRAS, 464, 3406

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Anisotropic galaxy clustering in Fourier-space. Beutler, F., Seo., H.-J., Saito, S., et al., 2017 MNRAS, 422, 2242

Modeling the reconstructed BAO in Fourier space. Seo, H.-J., Beutler, F., Ross, A.~J., Saito, S., 2016 MNRAS, 460, 2453

The foreground wedge and 21 cm BAO surveys. Seo, H.-J. & Hirata, C. M., 2016, MNRAS, 456, 3142

Improved Forecasts for the Baryon Acoustic Oscillations and Cosmological Distance Scale. Seo, H. -J. & Eisenstein, D. J. 2007, ApJ, 665, 14

Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak. Eisenstein, D. J., Seo, H.-j., Sirko, E., & Spergel, D. 2007, ApJ, 664, 675

Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys. Seo, H.-J., & Eisenstein, D. J. 2003, ApJ, 598, 720

Current Graduate Students

Current Undergraduate Students

Charles Seacrist
Brandon Coleman

Work-Related Experience

Ohio University, Department of Physics & Astronomy

Assistant Professor (Aug 2014 - present)

Ohio State University

CCAPP Fellow (Sep 2013 -- Aug 2014)

University of California at Berkeley

BCCP Fellow (Sep 2010 -- Aug 2013)

Fermilab

Research Associate: Theoretical Astrophysics (Oct 2007 -- Aug 2010)

University of Arizona

Teaching Assistant (Graduate) Steward Observatory (Spring 2007)

Research Assistant (Graduate) Steward Observatory (for Dr. D. Eisenstein) (Spring 2005-- Aug 2007)

Teaching Assistant (Graduate) Steward Observatory (Fall 2004)

Research Assistant (Graduate) Steward Observatory (for Dr. D. Eisenstein) (Fall 2001-- Spring 2004)

Research Assistant (Undergraduate) Steward Observatory (for Dr. G. Rieke) (Fall 1999-- Spring 2001)

Pharmacist

South Korea (1994-1998)

Grants

“Optimal and robust reconstruction of BAO, redshift-space distortions and the Alcock-Paczynski effect,” DE-SC0019091 (PI), 9/2018-8/2023, Department of Energy, Office of Science, Office of High Energy Physics, ($750,000)

“Improving Dark Energy Constraints Using Low Redshift Large Scale Structures,” DE-SC0014329 (Co-PI), 4/2018-3/2021, Department of Energy, Office of Science, Office of High Energy Physics, ($335,000)

“Improving Dark Energy Constraints Using Low Redshift Large Scale Structures,” DE-SC0014329 (Co-PI), 4/2017-3/2018, Department of Energy, Office of Science, Office of High Energy Physics, ($140,000)

“Improving Dark Energy Constraints Using Low Redshift Large Scale Structures,” DE-SC0014329 (Co-PI), 7/2015-3/2017, Department of Energy, Office of Science, Office of High Energy Physics, ($240,000)

Journal Publications

A complete FFT-based decomposition formalism for the redshift-space bispectrum. Sugiyama, N.~S., Saito, S., Beutler, F., & Seo, H.-J. 2018, arXiv:1803.02132

Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys. Ding, Z., Seo, H.-J., Vlah, Z., et al. 2018, MNRAS, 479, 1021

The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: anisotropic clustering analysis in configuration-space. Hou, J. et al. 2018, MNRAS

The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measurement of the growth rate of structure from the anisotropic correlation function between redshift 0.8 and 2.2. Zarrouk, P. et al. 2018, MNRAS, 477, 1639

The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: structure growth rate measurement from the anisotropic quasar power spectrum in the redshift range 0.8 < z < 2.2. Gil-Marin, H. et al. 2018, MNRAS 477, 1153

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: theoretical systematics and Baryon Acoustic Oscillations in the galaxy correlation function. Vargas_Mariana et al. 2018, MNRAS, 477, 1153

The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations at redshift of 0.72 with the DR14 Luminous Red Galaxy Sample. Bautista, J. et al. 2017

The Sloan Digital Sky Survey Quasar Catalog: Fourteenth Data Release. Paris, I. et al. 2018, A&A, 613, A51

Overview of the DESI Legacy Imaging Surveys. Dey, A. at al. 2018

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment. Abolfathi, B. et al. 2018, ApJS, 235, 42

Constraining the Baryon-Dark Matter Relative Velocity with the Large-Scale three-point Correlation Function of the SDSS BOSS DR12 CMASS Galaxies. Slepian, Z., Eisenstein, D.-J., Blazek, J.-A., et al. 2018, MNRAS, 474, 2109

The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: first measurement of baryon acoustic oscillations between redshift 0.8 and 2.2. Ata, M. et al. 2018, MNRAS< 473, 4773

The Time-domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy. MacLeod, C. et al. 2018, AJ, 155, 6

The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory. Albareti, F. et al. 2017, ApJS, 233, 25

The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: final emission line galaxy target selection. Raichoor, A. et al. 2017, MNRAS, 471, 3955

The Clustering of Luminous Red Galaxies at z ~ 0.7 from EBOSS and BOSS Data. Zhai, Z., Tinker, J., Hahn, C., Seo, H.-J. et al. 2017, ApJ, 848, 76

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample. Alam, S. et al. 2017, MNRAS, 470, 2617

Detection of baryon acoustic oscillation features in the large-scale three-point correlation function of SDSS BOSS DR12 CMASS galaxies. Slepian, Z. et al. 2017, MNRAS, 469, 1738

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: on the measurement of growth rate using galaxy correlation functions. Satpathy, S. 2017 et al. MNRAS, 469, 1369

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: towards a computationally efficient analysis without informative priors. Pellejero-Ibanez, M. et al. 2017, MNRAS, 468, 4116

Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe. Blanton, M. et al. 2017, AJ, 154, 28

The large-scale three-point correlation function of the SDSS BOSS DR12 CMASS galaxies. Slepian, Z. Et al. 2017, MNRAS< 468, 1070

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmic flows and cosmic web from luminous red galaxies. Ata, M. et al. 2017, MNRAS, 467, 3993

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Cosmological implications of the Fourier space wedges of the final sample. Grieb, J. et al. 2017, MNRAS, 467, 2085

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Cosmological implications of the configuration-space clustering wedges. Sanchez, A. et al. 2017, MNRAS, 464, 1640

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: combining correlated Gaussian posterior distributions. Sanchez, A. et al. 2017, MNRAS, 464, 1493

The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Observational systematics and baryon acoustic oscillations in the correlation function. Ross, A. J., Beutler, F., Chuang, C.-H., et al. (Seo, H.-J 5th author) 2017, MNRAS, 464, 1168

SPIDERS: the spectroscopic follow-up of X-ray selected clusters of galaxies in SDSS-IV. Clerc, N., et al. 2016, MNRAS, 463, 4490

Redshift Measurement and Spectral Classification for eBOSS Galaxies with the redmonster Software. Hutchinson, T. et al. 2016, AJ, 152, 205

The DESI Experiment Part II: Instrument Design. DESI Collaboration, 2016

The DESI Experiment Part I: Science, Targeting, and Survey Design. DESI Collaboration, 2016

Cosmic shear measurements with Dark Energy Survey Science Verification data. Becker, M. et al. 2016, PhRvD, 94, 2002

Cosmology from cosmic shear with Dark Energy Survey Science Verification data. About, T. et al. 2016, PhRvD, 94, 2001

Modeling the reconstructed BAO in Fourier space. Seo, H.-J., Beutler, F., Ross, A. J., Saito, S., 2016 MNRAS, 460, 2453, 2016., http://arxiv.org/abs/1511.00663v2

The foreground wedge and 21 cm BAO surveys Seo, H.-J. & Hirata, C. M., 2016, MNRAS, 456, 3142, 2015, http://arxiv.org/abs/1508.06503v2

The SDSS-IV extended Baryonic Oscillation Spectroscopic Survey: Luminous Red Galaxy Target Selection. Prakash, A., Licquia, T. C., Newman, J. A., et al., ApJS, 224, 34, 2016. http://arxiv.org/abs/1508.04478v1

The extended Baryon Oscillation Spectroscopic Survey (eBOSS): a cosmological forecast. Zhao, G.-B., Wang, Y., Ross, A. J., et al., MNRAS, 457, 2377, 2016. http://arxiv.org/abs/1510.08216v2

The BOSS-WiggleZ overlap region I: Baryon Acoustic Oscillations. Beutler, F., Blake, C., Koda, J., et al., MNRAS, 455, 3230, 2016. http://arxiv.org/abs/1506.03900

The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Overview and Early Data. Dawson, K., Kneib, J.-P., Percival, W., et al., ApJ, 151, 44, 2016. http://arxiv.org/abs/1508.04473v219.

The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III. Alam, S., Albareti, F. D., Allende Prieto, C., et al., ApJS, 219, 12, 2015. http://arxiv.org/abs/1501.00963

Cosmological implications of baryon acoustic oscillation (BAO) measurements Aubourg,. E Ì., Bailey, S., Bautista, J. E., et al., Phys. Rev. D, 92, 123516, 2015. http://arxiv.org/abs/1411.1074

The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Quasar Target Selection. Myers, A. D., Palanque-Delabrouille, N., Prakash, A., et al., ApJS, 221, 27, 2015. http://arxiv.org/abs/1508.04472v2

Sloan Digital Sky Survey III photometric quasar clustering: probing the initial conditions of the Universe. Ho, S., Agarwal, N., Myers, A. D., Lyons, R., Disbrow, A., Seo, H.-J., et al., J. Cosmology and Nongalactic Astrophysics Astropart. Phys., 5, 040, 2015. http://arxiv.org/abs/1311.2597

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Signs of neutrino mass in current cosmological data sets. Beutler, F., Saito, S., Brownstein, J. R., et al., MNRAS, 444, 4, 16, 2014. http://arxiv.org/abs/1403.4599

The SDSS Coadd: 250 deg2 of deep SDSS imaging on Stripe 82. Annis, J., Soares-Santos, M., Strauss, M. A., et al. (Seo, H.-J. 18th author), ApJ, 794, 2, 18, 2015. http://arxiv.org/abs/1111.6619

A 2.5 per cent measurement of the growth rate from small-scale redshift space clustering of SDSS-III CMASS galaxies. Reid, Beth A., Seo, H.-J., Leauthaud, A., Tinker, J. L., White, M., MNRAS, 444, 476, 2014

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: testing gravity with redshift space distortions using the power spectrum multipoles. Beutler, F., Saito, S., Seo, H.-J., et al., MNRAS, 443, 1065, 2014. http://arxiv.org/abs/1312.4611

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Data Releases 10 and 11 Galaxy samples. Anderson, L., Aubourg, E Ì,., Bailey, S., et al. 2014, MNRAS, 441, 24. http://arxiv.org/abs/1312.4877

DESI and other Dark Energy experiments in the era of neutrino mass measurements. Font-Ribera, A., McDonald, P., Mostek, N., Reid, B. A., Seo, H.-J., Slosar, A., 2014, J. Cosmology Astropart. Phys., 5, 23. http://arxiv.org/abs/1308.4164

The clustering of Galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: including covariance matrix errors
Percival, W. J., Ross, A. J., Sanchez, A. G., et al. 2014, MNRAS, 439, 2531
http://arxiv.org/abs/1312.4841

Characterizing unknown systematics in large scale structure surveys. Agarwal, N., Ho, S., Myers, A. D., Seo, H.-J. et al. 2014, J. Cosmology Astropart. Phys., 4, 7. http://arxiv.org/abs/1309.2954

The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment. Ahn, C. P., Alexandroff, R., Allende Prieto, C., et al. 2014, ApJS, 211, 17. http://arxiv.org/abs/1307.7735

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measuring DA and H at z = 0.57 from the baryon acoustic peak in the Data Release 9 spectroscopic Galaxy sample. Anderson, L., Aubourg, E., Bailey, S., et al. 2014, MNRAS, 439, 83. http://arxiv.org/abs/1303.4666

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measuring H(z) and DA(z) at z = 0.57 with clustering wedges
Kazin, E. A., S Ì,anchez, A. G., Cuesta, A. J., et al. 2013, MNRAS, 435, 64
http://arxiv.org/abs/1303.4391

The Baryon Oscillation Spectroscopic Survey of SDSS-III. Dawson, K. S., Schlegel, D. J., Ahn, C. P., et al. 2013, AJ, 145, 10. http://arxiv.org/abs/1208.0022

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 9 Spectroscopic Galaxy Sample. Anderson, L., Aubourg, E., Bailey, S., et al. 2012, MNRAS, 427, 3435. http://arxiv.org/abs/1203.6594

The Clustering of Galaxies in SDSS-III DR9 Baryon Oscillation Spectroscopic Survey: Constraints on Primordial Non-Gaussianity. Ross, A. et al. 2012, MNRAS, 150. http://arxiv.org/abs/1208.1491

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measurements of the growth of structure and expansion rate at z=0.57 from anisotropic clustering. Reid, B. et al. 2012, MNRAS, 426, 2719. http://arxiv.org/abs/1203.6641

Acoustic scale from the angular power spectra of SDSS-III DR8 photometric luminous galaxies. Seo, H.-J. et al., 2012, ApJ, 761, 13. http://arxiv.org/abs/1201.2172

Clustering of Sloan digital sky survey III photometric luminous galaxies and its cosmological implications. Ho, S., Cuesta, A., Seo, H.-J. et al., 2012, ApJ, 761, 14. http://arxiv.org/abs/1201.2137

New Neutrino Mass Bounds from SDSS-III DR8 Photometric Luminous Galaxies. de Putter, R., Mena, O., Guisarma, E., Ho, S., Cuesta, A., Seo, H.-J. et al. 12. http://arxiv.org/abs/1201.1909

The SDSS Coadd: Cosmic Shear Measurement. Lin, Huan., Dodelson, S., Seo, H.-J. et al., 2012, ApJ, 761, 15. http://arxiv.org/abs/1111.6622

The SDSS Coadd: Weak Lensing around Clusters. Simet, M., Kubo, J. M., Dodelson, S., et al. (Seo, H.-J. 10th author), 2012, ApJ, 748, 128. http://arxiv.org/abs/1111.6621

The SDSS Coadd: A Galaxy Photometric Redshift Catalog. Reis, R. R. R., Soares-Santos, M., Annis, J., et al. (Seo, H.-J. 9th author), 2012, ApJ, 747, 59. http://arxiv.org/abs/1111.6620

Dark Energy from the log-transformed convergence field. Seo, H.-J., Sato, M., Takada, M., & Dodelson, S., 2012, ApJ, 748, 57./ http://arxiv.org/abs/1109.5639

Ameliorating systematic uncertainties in the angular clustering of galaxies: a study using the SDSS-III. Ross, A. J et al. (Seo, H.-J. 11th author) 2011, MNRAS, 417, 1350. http://arxiv.org/abs/1105.2320

The BigBOSS Experiment. Schlegel et. al. 2011. http://arxiv.org/abs/1106.1706

Galaxy Bias and Its Effects on the Baryon Acoustic Oscillation Measurements . Mehta K. T., Seo, H.-J., Eckel, J., et al. 2011, ApJ, 734, 94. http://arxiv.org/abs/1104.1178

Re-capturing Cosmic Information. Seo, H.-J., Sato, M., Dodelson, S., Jain, B., & Takada, M. 2011, ApJ, 729, L11. http://arxiv.org/abs/1008.0349

A Ground-Based 21cm Baryon Acoustic Oscillations. Seo, H.-J., Dodelson, S., Marriner, J., Mcginnis, D., Stebbins, A., Stoughton, C., Vallinotto A., 2010, ApJ, 721, 164. http://arxiv.org/abs/0910.5007

High-precision Predictions for the Acoustic Scale in the Non-linear Regime. Seo, H.-J., Eckel, J., Eisenstein, D. J., et al. 2010, ApJ, 720, 1650. http://arxiv.org/abs/0910.5005

A New Statistic for Analyzing Baryon Acoustic Oscillations. Xu, X., White, M., Padmanabhan, N., Eisenstein, D. J., et al. (Seo, H.-J. 9th author) 2010, ApJ, 718, 1224. http://arxiv.org/abs/1001.2324

Modeling the Large-scale Bias of Neutral Hydrogen. Marin, F. A., Gnedin, N. Y., Seo, H.-J., & Vallinotto, A. ApJ, 718, 972, 2010. http://arxiv.org/abs/0911.0041

First-year Sloan Digital Sky Survey-II (SDSS-II) supernova results: consistency and constraints with other intermediate-redshift datasets. Lampeitl, H., Nichol, R. C., Seo, H. -J. et al. 2010, MNRAS, 401, 2331. http://arxiv.org/abs/0910.2193

The Sloan Nearby Cluster Weak Lensing Survey. Kubo, J. M. et al. (Seo, H.-J. 10th author) 2009, ApJ, 702, L110. http://arxiv.org/abs/0908.1532

Nonlinear Structure Formation and the Acoustic Scale. Seo, H.-J., Siegel, E. R., Eisenstein, D. J., & White, M. 2008, ApJ, 686, 13. http://arxiv.org/abs/0805.0117

Passive Evolution of Galaxy Clustering. Seo, H. -J., Eisenstein, D. J. & Zehavi, I. 2008, ApJ, 681, 998. http://arxiv.org/abs/0712.1643

Improved Forecasts for the Baryon Acoustic Oscillations and Cosmological Distance Scale. Seo, H. -J. & Eisenstein, D. J. 2007, ApJ, 665, 14. http://arxiv.org/abs/astro-ph/0701079

Cosmological Constraints from the SDSS Luminous Red Galaxies. Tegmark, M., et al. (Seo, H.-J. 19th author) 2006, Phys. Rev. D, 74, 123507. http://arxiv.org/abs/astro-ph/0608632

The three-point correlation function of luminous red galaxies in the Sloan Digital Sky Survey. Kulkarni, G. V., Nichol, R. C., Sheth, R. K., Seo, H.-J., Eisenstein, D. J., & Gray, A. 2007, MNRAS, 378, 1196. http://arxiv.org/abs/astro-ph/0703340

Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak,. Eisenstein, D. J., Seo, H.-J., Sirko, E., & Spergel, D. 2007, ApJ, 664, 675. http://arxiv.org/abs/astro-ph/0604362

On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter. Eisenstein, D. J., Seo, H.-J. & White, M. 2007, ApJ, 664, 660, http://arxiv.org/abs/astro-ph/0604361

Baryonic Acoustic Oscillations in Simulated Galaxy Redshift Surveys, Seo, H.-J., & Eisenstein, D. J. 2005, ApJ, 633, 575, http://arxiv.org/abs/astro-ph/0507338

Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies. Eisenstein, D. J., et al. (Seo, H.-J. 8th author) 2005, ApJ, 633, 560. http://arxiv.org/abs/astro-ph/0501171

Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys. Seo, H.-J., & Eisenstein, D. J. 2003, ApJ, 598, 720. http://adsabs.harvard.edu/abs/2003ApJ...598..720S

Personal Profile

I was born in Busan, South Korea. Due to external circumstances, I pursued my education in a college of pharmacy in the Busan National University instead of studying astrophysics which had been my dream. After a few years of working in local pharmacies and a hospital to save enough money to come to the United States and study astrophysics, I was accepted in the undergraduate program of the University of Arizona in the spring of 1999. There I studied disk properties of young stellar objects alongside my mentor and adviser, Dr. George Rieke.

I graduated in 2001 with a B.S. in astronomy and physics and was accepted to the graduate program of the University of Arizona. I worked on the large scale structure of the Universe under the guidance of Dr. Daniel Eisenstein and graduated with a Ph.D. in 2007. I then moved to Fermilab and worked as a postdoc for the next three years. In 2010, I became a fellow at the Berkeley Center for Cosmological Physics at the University of California. Three years later I received an offer to join the faculty at Ohio University. In 2013, I moved to Columbus, Ohio, to spend one year as a CCAPP Postdoctoral Fellow at Ohio State University, and moved to Athens in the Fall, 2014.

My research interests are in high precision cosmology with large scale structure. I study the distributions of galaxies and matter on very large scales to infer how our universe has expanded, what our universe is composed of, and therefore to collect observational clues to identify dark energy and dark matter, which together makes up 95 percent of universe while still being quite mysterious.

My work involves various methods of analyzing the large scale structure of galaxies and matter, including analytical, numerical, observational studies of Baryon Acoustic Oscillations (BAO), a distinct feature imprinted in large galaxy surveys and or radio surveys, as a dark energy probe. I am also interested in relating observed galaxies to the underlying dark matter halo distributions, finding the upper limit on neutrino mass using the large scale structure, weak gravitational lensing signal of the dark matter distribution.

Outside of work, I am a mother of two young children and that keeps me quite busy. My non-astrophysics investigations are on-going; to look for cool playgrounds and places for family outings.

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