Results 41 to 50 of about 24,234 (169)

A Physically Motivated Framework to Compare Pair Fractions of Isolated Low- and High-mass Galaxies across Cosmic Time

The Astrophysical Journal
Low-mass galaxy pair fractions are understudied, and it is unclear whether low-mass pair fractions evolve in the same way as more massive systems over cosmic time. In the era of JWST, Roman, and Rubin, selecting galaxy pairs in a self-consistent way will
Katie Chamberlain, Gurtina Besla, Ekta Patel, Vicente Rodriguez-Gomez, Paul Torrey, Garreth Martin, Kelsey Johnson, Nitya Kallivayalil, David Patton, Sarah Pearson, George Privon, Sabrina Stierwalt   +11 more
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Halo occupation distribution estimation performance for LSST data

Astronomy & Astrophysics
Context. Upcoming imaging surveys, such as the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), will enable high signal-to-noise measurements of galaxy clustering.
Cataldi P., Cristiani V., Rodriguez F., Taverna A., Artale M. C., Levine B., Wu H.   +6 more
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Project AMIGA: The Inner Circumgalactic Medium of Andromeda from Thick Disk to Halo

The Astrophysical Journal
The inner circumgalactic medium (CGM) of galaxies, where disk and halo processes intersect, remains poorly characterized despite its critical role in regulating galaxy evolution.
Nicolas Lehner, J. Christopher Howk, Lucy Collins, Sameer, Bart P. Wakker, Ramona Augustin, Kathleen A. Barger, Michelle A. Berg, Rongmon Bordoloi, Thomas M. Brown, Frances H. Cashman, Claude-André Faucher-Giguère, Andrew J. Fox, David M. French, Karoline M. Gilbert, Puragra Guhathakurta, John M. O’Meara, Brian W. O’Shea, Molly S. Peeples, D. J. Pisano, J. Xavier Prochaska, Jonathan Stern, Jason Tumlinson, Jessica K. Werk, Benjamin F. Williams   +24 more
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HerS-3: An Exceptional Einstein Cross Reveals a Massive Dark Matter Halo

The Astrophysical Journal
We present a study of HerS-3, a dusty star-forming galaxy at z _spec  = 3.0607, which is gravitationally amplified into an Einstein cross with a fifth image of the background galaxy seen at the center of the cross.
P. Cox, K. M. Butler, C. R. Keeton, L. Eid, E. Borsato, T. J. L. C. Bakx, R. Neri, B. M. Jones, P. Prajapati, A. J. Baker, S. Berta, A. Cooray, E. M. Corsini, L. Marchetti, A. Omont, A. Beelen, R. Gavazzi, D. Ismail, R. J. Ivison, M. Krips, M. D. Lehnert, H. Messias, D. Riechers, C. Vlahakis, A. Weiss, P. van der Werf, C. Yang   +26 more
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Galaxy groups within voids

Astronomy & Astrophysics
Context. Despite cosmic voids being vast and almost empty, galaxy aggregations do exist within them, although they are much sparser than in denser regions like walls, filaments, and clusters.
Argudo-Fernández M., Torres-Ríos G., Vásquez-Bustos P., Verley S., Pérez I., Duarte Puertas S., Jiménez A., García-Benito R., Zurita A., Alcázar-Laynez M., Bidaran B., Conrado A., Espada D., Florido E., González Delgado R., Hernández-Sánchez M., del Moral-Castro I., Román J., Sánchez-Menguiano L., Subramanian S., Villalba-González P.   +20 more
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Revisiting Ram Pressure Stripping in Wolf–Lundmark–Melotte: No Evidence for Stripped H I with Local Group L-Band Survey

The Astronomical Journal
We analyze H i 21 cm observations of the Local Group dwarf galaxy Wolf–Lundmark–Melotte (WLM) from the Local Group L -Band Survey to search for evidence of ram pressure stripping.
Daniel R. Rybarczyk, Eric W. Koch, Fabian Caballero Vargas, Snežana Stanimirović, Nickolas M. Pingel, Julianne J. Dalcanton, Adam K. Leroy, Erik W. Rosolowsky, Michael P. Busch, Chang-Goo Kim, Adam Smercina, Elizabeth Tarantino, Vicente Villanueva, Alberto D. Bolatto, Thomas G. Williams   +14 more
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The properties of fossil groups of galaxies [PDF]

Astronomische Nachrichten, 2009
AbstractNumerical simulations as well as optical and X‐ray observations over the last few years have shown that poor groups of galaxies can evolve to what is called a fossil group. Dynamical friction as the driving process leads to the coalescence of individual galaxies in ordinary poor groups leaving behind nothing more than a central, massive ...
Eigenthaler, Paul, Zeilinger, Werner W.
openaire   +2 more sources

A Massive Quiescent Galaxy in a Group Environment at z = 4.53

The Astrophysical Journal
We report on the spectroscopic confirmation of a massive quiescent galaxy at z _spec = 4.53 in the COSMOS field. The object was first identified as a galaxy with suppressed star formation at z _phot ∼ 4.65 from the COSMOS2020 catalog.
Takumi Kakimoto, Masayuki Tanaka, Masato Onodera, Rhythm Shimakawa, Po-Feng Wu, Katriona M. L. Gould, Kei Ito, Shuowen Jin, Mariko Kubo, Tomoko L. Suzuki, Sune Toft, Francesco Valentino, Kiyoto Yabe   +12 more
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Dwarf Galaxies in Focus: A Survey of Observational and Theoretical Studies

Galaxies
This paper presents provides a comprehensive survey of dwarf galaxies, which represent the most numerous and diverse systems in the Universe. We discuss their definitions and morphological classifications, emphasizing the unique properties that ...
Komiljon Tillaboev, Ikram Tadjibaev, Kamolidin Mamadaliyev, Dildor Otajonova, Malokhat Atajonova, Bagzodbek Abdullayev   +5 more
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The Panchromatic Hubble Andromeda Southern Treasury (PHAST). II. The Spatially Resolved Recent Star Formation History in M31

The Astrophysical Journal
We use Hubble Space Telescope optical imaging from the Panchromatic Hubble Andromeda Southern Treasury (PHAST) to measure the spatially resolved recent star formation history (SFH) across the southern disk of M31.
Tobin M. Wainer, Benjamin F. Williams, Zhuo Chen, Margaret Lazzarini, Julianne J. Dalcanton, Eric F. Bell, Kameron Goold, Andrew Dolphin, Meredith J. Durbin, Stefany L. Fabian Dubón, Karoline M. Gilbert, Puragra Guhathakurta, Francois Hammer, L. Clifton Johnson, Eric W. Koch, Kristen. B. W. McQuinn, Ekta Patel, Vaishnav V. Rao, Julia Roman-Duval, Adam Smercina, Debby Tran, Daniel R. Weisz   +21 more
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