Search Results - "Sohn, Sangmo"

On the Co-orbitation of Satellite Galaxies along the Great Plane of Andromeda: NGC 147, NGC 185, and Expectations from Cosmological Simulations by Pawlowski, Marcel S., Tony Sohn, Sangmo

“…Abstract Half of the satellite galaxies of Andromeda form a narrow plane termed the Great Plane of Andromeda (GPoA), and their line-of-sight velocities display…”
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THE M31 VELOCITY VECTOR. II. RADIAL ORBIT TOWARD THE MILKY WAY AND IMPLIED LOCAL GROUP MASS by VAN DER MAREL, Roeland P, FARDAL, Mark, BESLA, Gurtina, BEATON, Rachael L, TONY SOHN, Sangmo, ANDERSON, Jay, BROWN, Tom, GUHATHAKURTA, Puragra

“…We determine the velocity vector of M31 with respect to the Milky Way and use this to constrain the mass of the Local Group, based on Hubble Space Telescope…”
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THE M31 VELOCITY VECTOR. I. HUBBLE SPACE TELESCOPE PROPER-MOTION MEASUREMENTS by TONY SOHN, Sangmo, ANDERSON, Jay, VAN DER MAREL, Roeland P

“…We present the first proper-motion (PM) measurements for the galaxy M31. We obtained new V-band imaging data with the Hubble Space Telescope ACS/WFC and the…”
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Orbits of massive satellite galaxies – I. A close look at the Large Magellanic Cloud and a new orbital history for M33 by Patel, Ekta, Besla, Gurtina, Sohn, Sangmo Tony

“…The Milky Way (MW) and M31 both harbour massive satellite galaxies, the Large Magellanic Cloud (LMC) and M33, which may comprise up to 10 per cent of their…”
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GaiaHub: A Method for Combining Data from the Gaia and Hubble Space Telescopes to Derive Improved Proper Motions for Faint Stars by del Pino, Andrés, Libralato, Mattia, van der Marel, Roeland P., Bennet, Paul, Fardal, Mark A., Anderson, Jay, Bellini, Andrea, Tony Sohn, Sangmo, Watkins, Laura L.

“…Abstract We present GaiaHub , a publicly available tool that combines Gaia measurements with Hubble Space Telescope (HST) archival images to derive proper…”
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AN HST PROPER-MOTION STUDY OF THE LARGE-SCALE JET OF 3C273 by Meyer, Eileen T., Sparks, William B., Georganopoulos, Markos, Anderson, Jay, Marel, Roeland van der, Biretta, John, Tony Sohn, Sangmo, Chiaberge, Marco, Perlman, Eric, Norman, Colin

“…ABSTRACT The radio galaxy 3C 273 hosts one of the nearest and best-studied powerful quasar jets. Having been imaged repeatedly by the Hubble Space Telescope…”
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Estimating the Mass of the Milky Way Using the Ensemble of Classical Satellite Galaxies by Patel, Ekta, Besla, Gurtina, Mandel, Kaisey, Sohn, Sangmo Tony

“…High precision proper motion (PM) measurements are available for approximately 20% of all known dwarf satellite galaxies of the Milky Way (MW). Here we extend…”
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THE M31 VELOCITY VECTOR. III. FUTURE MILKY WAY M31-M33 ORBITAL EVOLUTION, MERGING, AND FATE OF THE SUN by VAN DER MAREL, Roeland P, BESLA, Gurtina, COX, T. J, TONY SOHN, Sangmo, ANDERSON, Jay

“…We study the future orbital evolution and merging of the Milky Way (MW)-M31-M33 system, using a combination of collisionless N-body simulations and…”
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The Missing Satellites of the Magellanic Clouds? Gaia Proper Motions of the Recently Discovered Ultra-faint Galaxies by Kallivayalil, Nitya, Sales, Laura V., Zivick, Paul, Fritz, Tobias K., Del Pino, Andrés, Sohn, Sangmo Tony, Besla, Gurtina, van der Marel, Roeland P., Navarro, Julio F., Sacchi, Elena

“…According to LCDM theory, hierarchical evolution occurs on all mass scales, implying that satellites of the Milky Way should also have companions. The recent…”
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Absolute Hubble Space Telescope Proper Motion (HSTPROMO) of Distant Milky Way Globular Clusters: Galactocentric Space Velocities and the Milky Way Mass by Sohn, Sangmo Tony, Watkins, Laura L., Fardal, Mark A., van der Marel, Roeland P., Deason, Alis J., Besla, Gurtina, Bellini, Andrea

“…We present Hubble Space Telescope (HST) absolute proper motion (PM) measurements for 20 globular clusters (GCs) in the Milky Way (MW) halo at Galactocentric…”
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SMHASH: anatomy of the Orphan Stream using RR Lyrae stars by Hendel, David, Scowcroft, Victoria, Johnston, Kathryn V, Fardal, Mark A, van der Marel, Roeland P, Sohn, Sangmo T, Price-Whelan, Adrian M, Beaton, Rachael L, Besla, Gurtina, Bono, Giuseppe, Cioni, Maria-Rosa L, Clementini, Giselle, Cohen, Judith G, Fabrizio, Michele, Freedman, Wendy L, Garofalo, Alessia, Grillmair, Carl J, Kallivayalil, Nitya, Kollmeier, Juna A, Law, David R, Madore, Barry F, Majewski, Steven R, Marengo, Massimo, Monson, Andrew J, Neeley, Jillian R, Nidever, David L, Pietrzyński, Grzegorz, Seibert, Mark, Sesar, Branimir, Smith, Horace A, Soszyński, Igor, Udalski, Andrzej

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The Proper-motion Field along the Magellanic Bridge: A New Probe of the LMC-SMC Interaction by Zivick, Paul, Kallivayalil, Nitya, Besla, Gurtina, Sohn, Sangmo Tony, van der Marel, Roeland P., del Pino, Andrés, Linden, Sean T., Fritz, Tobias K., Anderson, J.

“…We present the first detailed kinematic analysis of the proper motions (PMs) of stars in the Magellanic Bridge, from both the Gaia Data Release 2 catalog and…”
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NONLINEAR COLOR-METALLICITY RELATIONS OF GLOBULAR CLUSTERS. III. ON THE DISCREPANCY IN METALLICITY BETWEEN GLOBULAR CLUSTER SYSTEMS AND THEIR PARENT ELLIPTICAL GALAXIES by YOON, Suk-Jin, LEE, Sang-Yoon, BLAKESLEE, John P, PENG, Eric W, SOHN, Sangmo T, CHO, Jaeil, KIM, Hak-Sub, CHUNG, Chul, KIM, Sooyoung, LEE, Young-Wook

“…One of the conundrums in extragalactic astronomy is the discrepancy in observed metallicity distribution functions (MDFs) between the two prime stellar…”
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Proper Motions of Jets on the Kiloparsec Scale: New Results with HST by Meyer, Eileen, Sparks, William, Georganopoulos, Markos, van der Marel, Roeland, Anderson, Jay, Sohn, Sangmo, Biretta, John, Norman, Colin, Chiaberge, Marco, Perlman, Eric

“…The Hubble Space Telescope recently celebrated 25 years of operation. Some of the first images of extragalactic optical jets were taken by HST in the…”
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NONLINEAR COLOR-METALLICITY RELATIONS OF GLOBULAR CLUSTERS. II. A TEST ON THE NONLINEARITY SCENARIO FOR COLOR BIMODALITY USING THE u-BAND COLORS: THE CASE OF M87 (NGC 4486) by YOON, Suk-Jin, SOHN, Sangmo T, LEE, Sang-Yoon, KIM, Hak-Sub, CHO, Jaeil, CHUNG, Chul, BLAKESLEE, John P

“…The optical color distributions of globular clusters (GCs) in most large elliptical galaxies are bimodal. Based on the assumed linear relationship between GC…”
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NONLINEAR COLOR-METALLICITY RELATIONS OF GLOBULAR CLUSTERS. IV. TESTING THE NONLINEARITY SCENARIO FOR COLOR BIMODALITY VIA HST /WFC3 u -BAND PHOTOMETRY OF M84 (NGC 4374) by Yoon, Suk-Jin, Sohn, Sangmo T, Kim, Hak-Sub, Chung, Chul, Cho, Jaeil, Lee, Sang-Yoon, Blakeslee, John P

“…Color distributions of globular clusters (GCs) in most massive galaxies are bimodal. Assuming linear color-to-metallicity conversions, bimodality is viewed as…”
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JWST-TST DREAMS: Quartz Clouds in the Atmosphere of WASP-17b by Grant, David, Lewis, Nikole K., Wakeford, Hannah R., Batalha, Natasha E., Glidden, Ana, Goyal, Jayesh, Mullens, Elijah, MacDonald, Ryan J., May, Erin M., Seager, Sara, Stevenson, Kevin B., Valenti, Jeff A., Visscher, Channon, Alderson, Lili, Allen, Natalie H., Cañas, Caleb I., Colón, Knicole, Clampin, Mark, Espinoza, Néstor, Gressier, Amélie, Huang, Jingcheng, Lin, Zifan, Long, Douglas, Louie, Dana R., Peña-Guerrero, Maria, Ranjan, Sukrit, Sotzen, Kristin S., Valentine, Daniel, Anderson, Jay, Balmer, William O., Bellini, Andrea, Hoch, Kielan K. W., Kammerer, Jens, Libralato, Mattia, Mountain, C. Matt, Perrin, Marshall D., Pueyo, Laurent, Rickman, Emily, Rebollido, Isabel, Sohn, Sangmo Tony, van der Marel, Roeland P., Watkins, Laura L.

“…Abstract Clouds are prevalent in many of the exoplanet atmospheres that have been observed to date. For transiting exoplanets, we know if clouds are present…”
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HSTPROMO Internal Proper-motion Kinematics of Dwarf Spheroidal Galaxies. I. Velocity Anisotropy and Dark Matter Cusp Slope of Draco by Vitral, Eduardo, van der Marel, Roeland P., Sohn, Sangmo Tony, Libralato, Mattia, del Pino, Andrés, Watkins, Laura L., Bellini, Andrea, Walker, Matthew G., Besla, Gurtina, Pawlowski, Marcel S., Mamon, Gary A.

“…Abstract We analyze four epochs of Hubble Space Telescope imaging over 18 yr for the Draco dwarf spheroidal galaxy. We measure precise proper motions for…”
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JWST-TST Proper Motions. I. High-precision NIRISS Calibration and Large Magellanic Cloud Kinematics by Libralato, Mattia, Bellini, Andrea, van der Marel, Roeland P., Anderson, Jay, Sohn, Sangmo Tony, Watkins, Laura L., Alderson, Lili, Allen, Natalie, Clampin, Mark, Glidden, Ana, Goyal, Jayesh, Hoch, Kielan, Huang, Jingcheng, Kammerer, Jens, Lewis, Nikole K., Lin, Zifan, Long, Douglas, Louie, Dana, MacDonald, Ryan J., Mountain, Matt, Peña-Guerrero, Maria, Perrin, Marshall D., Pueyo, Laurent, Rebollido, Isabel, Rickman, Emily, Seager, Sara, Stevenson, Kevin B., Valenti, Jeff A., Valentine, Daniel, Wakeford, Hannah R.

“…Abstract We develop and disseminate effective point-spread functions and geometric-distortion solutions for high-precision astrometry and photometry with the…”
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Deep Hubble Space Telescope Photometry of Large Magellanic Cloud and Milky Way Ultrafaint Dwarfs: A Careful Look into the Magnitude–Size Relation by Richstein, Hannah, Kallivayalil, Nitya, Simon, Joshua D., Garling, Christopher T., Wetzel, Andrew, Warfield, Jack T., van der Marel, Roeland P., Jeon, Myoungwon, Rose, Jonah C., Torrey, Paul, Engelhardt, Anna Claire, Besla, Gurtina, Choi, Yumi, Geha, Marla, Guhathakurta, Puragra, Kirby, Evan N., Patel, Ekta, Sacchi, Elena, Sohn, Sangmo Tony

“…Abstract We present deep Hubble Space Telescope photometry of 10 targets from Treasury Program GO-14734, including six confirmed ultrafaint dwarf (UFD)…”
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