Results 1 to 10 of about 229,032 (348)

Galaxy Structure, Dark Matter, and Galaxy Formation [PDF]

, 1996
To appear in "Dark and Visible Matter in Galaxies and Cosmological Implications," eds. M. Persic and P. Salucci, A.S.P. Conference Series.
David H. Weinberg
openalex   +3 more sources

The Distribution of Open Clusters in the Galaxy

Frontiers in Astronomy and Space Sciences, 2021
In this work we explore the new catalog of galactic open clusters that became available recently, containing 1,750 clusters that have been re-analyzed using the Gaia DR2 catalog to determine the stellar memberships.
Hektor Monteiro, Douglas A. Barros, Wilton S. Dias, Jacques R. D. Lépine   +3 more
doaj   +1 more source

The Principle of Maximum Entropy and the Distribution of Mass in Galaxies

Universe, 2022
We do not have a final answer to the question of why galaxies choose a particular internal mass distribution. Here we examine whether the distribution is set by thermodynamic equilibrium (TE).
Jorge Sánchez Almeida
doaj   +1 more source

The Quest for the Nature of the Dark Matter: The Need of a New Paradigm

Astronomy, 2023
The phenomenon of the Dark matter baffles the researchers: the underlying dark particle has escaped so far the detection and its astrophysical role appears complex and entangled with that of the standard luminous particles.
Fabrizio Nesti, Paolo Salucci, Nicola Turini   +2 more
doaj   +1 more source

STRUCTURAL PARAMETERS OF GALAXIES IN CANDELS [PDF]

The Astrophysical Journal Supplement Series, 2012
public data release of structural parameters from CANDELS WFC3 data: http://www.mpia-hd.mpg.de/homes/vdwel/candels ...
van der Wel, Arjen, Bell, EF, Haeussler, B, McGrath, EJ, Chang, Yu-Yen, Guo, Yicheng, McIntosh, DH, Rix, H-W, Barden, M, Cheung, E, Faber, SM, Ferguson, HC, Galametz, A, Grogin, NA, Hartley, W, Kartaltepe, JS, Kocevski, DD, Koekemoer, AM, Lotz, J, Mozena, M, Peth, MA, Peng, Chien Y   +21 more
openaire   +4 more sources

Quantitative Morphology of High-Redshift Galaxies Using GALEX Ultraviolet Images of Nearby Galaxies [PDF]

Journal of Astronomy and Space Sciences, 2017
We present simulations of the optical-band images of high-redshift galaxies utilizing 845 near-ultraviolet (NUV) images of nearby galaxies obtained through the Galaxy Evolution Explorer (GALEX). We compute the concentration (C), asymmetry (A), Gini (G),
Bum-Suk Yeom, Soo-Chang Rey, Youngkwang Kim, Youngdae Lee, Jiwon Chung, Suk Kim, Woong Lee   +6 more
doaj   +1 more source

JWST Reveals a Population of Ultrared, Flattened Galaxies at 2 ≲ z ≲ 6 Previously Missed by HST

The Astrophysical Journal Letters, 2023
With just a month of data, JWST is already transforming our view of the universe, revealing and resolving starlight in unprecedented populations of galaxies.
Erica J. Nelson, Katherine A. Suess, Rachel Bezanson, Sedona H. Price, Pieter van Dokkum, Joel Leja, Bingjie Wang, Katherine E. Whitaker, Ivo Labbé, Laia Barrufet, Gabriel Brammer, Daniel J. Eisenstein, Justus Gibson, Abigail I. Hartley, Benjamin D. Johnson, Kasper E. Heintz, Elijah Mathews, Tim B. Miller, Pascal A. Oesch, Lester Sandles, David J. Setton, Joshua S. Speagle, Sandro Tacchella, Ken-ichi Tadaki, Hannah Übler, John. R. Weaver   +25 more
doaj   +1 more source

A Rest-frame Near-IR Study of Clumps in Galaxies at 1 < z < 2 Using JWST/NIRCam: Connection to Galaxy Bulges

The Astrophysical Journal, 2023
A key question in galaxy evolution has been the importance of the apparent “clumpiness” of high-redshift galaxies. Until now, this property has been primarily investigated in rest-frame UV, limiting our understanding of their relevance.
Boris S. Kalita, John D. Silverman, Emanuele Daddi, Connor Bottrell, Luis C. Ho, Xuheng Ding, Lilan Yang   +6 more
doaj   +1 more source

Warm Dark Matter Galaxies with Central Supermassive Black Holes

Universe, 2022
We generalize the Thomas–Fermi approach to galaxy structure to include central supermassive black holes and find, self-consistently and non-linearly, the gravitational potential of the galaxy plus the central black hole (BH) system.
Hector J. de Vega, Norma G. Sanchez
doaj   +1 more source

Galaxy Phase-Space Density Data Preclude That Bose–Einstein Condensate Be the Total Dark Matter

Universe, 2022
Ultralight scalars with a typical mass of the order m∼10−22 eV and light scalars forming a Bose–Einstein condensate (BEC) exhibit a Jeans length in the kpc scale and were therefore proposed as dark matter (DM) candidates.
Héctor J. de Vega, Norma G. Sanchez
doaj   +1 more source