Results 11 to 20 of about 534,324 (307)

The nature of red dwarf galaxies [PDF]

Astrophys.J.697:247-257,2009, 2008
Using dark matter halos traced by galaxy groups selected from the Sloan Digital Sky Survey Data Release 4, we find that about 1/4 of the faint galaxies ($\rmag >-17.05$, hereafter dwarfs) that are the central galaxies in their own halo are not blue and star forming, as expected in standard models of galaxy formation, but are red.
Wang, Y, Yang, XH, Mo, HJ, van den Bosch, FC, Katz, N, Pasquali, A, McIntosh, DH, Weinmann, SM   +7 more
arxiv   +7 more sources

Giant Halos in Dwarf Irregular Galaxies vs. Dwarf Elliptical Galaxies [PDF]

Proceedings of the International Astronomical Union, 2005
We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the ...
Hwang, Narae, Lee, Myung Gyoon
core   +4 more sources

Star forming dwarf galaxies [PDF]

, 2011
Star forming dwarf galaxies (SFDGs) have a high gas content and low metallicities, reminiscent of the basic entities in hierarchical galaxy formation scenarios.
A Adamo, A Begum, A Dekel, A Leroy, AO Razoumov, AT Marlowe, BG Elmegreen, C Kehrig, C Weidner, CA Tremonti, CE Simpson, CW Engelbracht, D Kunth, D Kunth, D Kunth, D Kunth, D Kunth, DA Hunter, DA Hunter, DA Hunter, DA Hunter, DA Hunter, DG Barnes, DI Méndez, DK Strickland, DR Garnett, E Tolstoy, E Zackrisson, ED Skillman, ED Skillman, F Walter, F Zwicky, FP Israel, G Efstathiou, G Östlin, G Östlin, G Östlin, G Östlin, G Östlin, GH Rieke, GJ Stacey, GL Hoffman, GL Hoffman, GR Meurer, GR Meurer, H Hirashita, H Lee, H Lee, H Loose, H Yang, ID Karachentsev, J Brinchmann, J Koeppen, J Lequeux, J Lequeux, J Masegosa, J Roennback, J Silk, JC Lee, JH Knapen, JI Davies, JJ Condon, JJ Dalcanton, JJ Dalcanton, JJ Salzer, JM Cannon, JM Scalo, JM Schombert, JP Grimes, JS Gallagher III, JS Gallagher III, KBW McQuinn, KBW McQuinn, KBW McQuinn, KG Noeske, L Mayer, L Mayer, L Mayer, L Searle, L Searle, L Staveley-Smith, L Zee van, L Zee van, LA Sargsyan, LK Summers, LK Summers, LM Cairós, LS Pilyugin, M Asplund, M Dahlem, M Drinkwater, M Geha, M Hayes, M Mac Low, M Ouchi, M Schmidt, MK Crawford, MR Blanton, MR Krumholz, N Bergvall, N Bergvall, N Bergvall, N Bergvall, NG Guseva, NY Gnedin, P Papaderos, P Papaderos, P Papaderos, P Papaderos, PA James, PW Hodge, R Giovanelli, RA Overzier, RA Pildis, RB Larson, RB Larson, RB Larson, RC Kennicutt Jr, RC Kennicutt Jr, RJ Bouwens, RJ Bouwens, RW Oconnell, S Recchi, S Roychowdhury, S Roychowdhury, SA Pustilnik, SC Madden, SD Rosenbaum, SS McGaugh, T Fang, T Marquart, TI Larsen, TM Heckman, TM Heckman, TX Thuan, U Lisenfeld, V Burkholder, V Lapparent de, WJG Blok de, WK Huchtmeier, X Dai, Y Harayama, Y Komiyama, YI Izotov, YI Izotov, YI Izotov, YI Izotov   +146 more
core   +4 more sources

Dwarf-Galaxy Cosmology [PDF]

Advances in Astronomy, 2010
This is the editorial paper which introduces the Special Issue on Dwarf-Galaxy Cosmology published in Advances in Astronomy. The issue contains fourteen review papers, and one original research article. All papers were peer-reviewed by a minimum of two referees. To read the Special Issue, please follow this link: http://www.hindawi.com/journals/aa/2010/
Regina Schulte-Ladbeck, Ulrich Hopp, Elias Brinks, Andrey Kravtsov   +3 more
doaj   +5 more sources

Resolved Dwarf Galaxy Searches within ∼5 Mpc with the Vera Rubin Observatory and Subaru Hyper Suprime-Cam [PDF]

Astrophysical Journal, 2021
We present a preview of the faint dwarf galaxy discoveries that will be possible with the Vera C. Rubin Observatory and Subaru Hyper Suprime-Cam in the next decade.
B. Mutlu-Pakdil, D. Sand, D. Crnojevi'c, A. Drlica-Wagner, N. Caldwell, P. Guhathakurta, A. Seth, J. Simon, J. Strader, E. Toloba   +9 more
semanticscholar   +1 more source

An extended halo around an ancient dwarf galaxy [PDF]

Nature Astronomy, 2020
The Milky Way is surrounded by dozens of ultrafaint (107 M☉, consistent with a generalized Navarro–Frenk–White density profile. The extended nature of Tucana II suggests that it may have undergone strong bursty feedback or been the product of an early ...
A. Chiti, A. Frebel, J. Simon, D. Erkal, Laura J. Chang, L. Necib, A. Ji, H. Jerjen, Dongwon Kim, J. Norris   +9 more
semanticscholar   +1 more source

Formation of Transitional cE/UCD Galaxies through Massive/Dwarf Disc Galaxy Mergers

Galaxies, 2023
The dynamics of the merger of a dwarf disc galaxy with a massive spiral galaxy of the Milky Way type were studied in detail. The remnant of such interaction after numerous crossings of the satellite through the disc of the main galaxy was a compact ...
Alexander V. Khoperskov, Sergey S. Khrapov, Danila S. Sirotin   +2 more
doaj   +1 more source

Constraining Primordial Black Holes with Dwarf Galaxy Heating [PDF]

, 2020
Black holes formed in the early universe, prior to the formation of stars, can exist as dark matter and also contribute to the black hole merger events observed in gravitational waves.
P. Lu, V. Takhistov, G. Gelmini, Kohei Hayashi, Y. Inoue, A. Kusenko   +5 more
semanticscholar   +1 more source

Dependence of stellar substructures in M31 type galaxy on satellite morphology in galaxy mergers [PDF]

Serbian Astronomical Journal, 2022
Stellar streams and shells are observed in halos of spiral galaxies. In this paper, we investigated the formation of these structures due to mergers between the host spiral galaxy and its dwarf satellite galaxies.
Milošević S.
doaj   +1 more source

Tidal Dwarf Galaxies [PDF]

Symposium - International Astronomical Union, 1998
We review the observational evidences for tidal dwarf galaxies, a class of small galaxies formed out of the tidal debris of collisions between massive galaxies. Tidal dwarfs are found far from the interacting parent galaxies, associated with massive clouds of atomic hydrogen located at the tip of long tidal tails.
I. F. Mirabel, Pierre-Alain Duc, Elias Brinks   +2 more
openaire   +4 more sources