Results 11 to 20 of about 34,781 (306)

Dwarf Spheroidal Galaxies : Keystones of Galaxy Evolution [PDF]

Publications of the Astronomical Society of the Pacific, 1994
Dwarf spheroidal galaxies are the most insignificant extragalactic stellar systems in terms of their visibility, but potentially very significant in terms of their role in the formation and evolution of much more luminous galaxies. We discuss the present
Gallagher III, John S., Wyse, Rosemary F. G.   +1 more
core   +5 more sources

The Dynamical and Chemical Evolution of Dwarf Spheroidal Galaxies [PDF]

Astronomy & Astrophysics, 2009
We present a large sample of fully self-consistent hydrodynamical Nbody/Tree-SPH simulations of isolated dwarf spheroidal galaxies (dSphs). It has enabled us to identify the key physical parameters and mechanisms at the origin of the observed variety in ...
A. Helmi, Alimi, B. Letarte, Babusiaux, Barkana, Barnes, Battaglia, Battaglia, Battaglia, Blais-Ouellette, Bosler, Bullock, Carraro, Coleman, de Blok, de Blok, de Blok, Dekel, Dolphin, E. Tolstoy, Efstathiou, Ferrara, Fukushige, G. Battaglia, Gallagher, Galli, Geisler, Gentile, Gentile, Gilmore, Gingold, Harbeck, Helmi, Hensler, Hernquist, Hernquist, Hurley-Keller, Ikuta, Irwin, K. A. Venn, Katz, Katz, Kawata, Kirby, Kleyna, Kobayashi, Koch, Koch, Kodama, Kroupa, Lanfranchi, Lee, Leitherer, Lucy, M. D. Shetrone, M. Irwin, Mac Low, Maio, Maraston, Maraston, Marcolini, Marcolini, Martin, Mateo, Mayer, Mighell, Monaghan, Moore, Mori, Mori, Murakami, Muñoz, Navarro, P. Jablonka, Peñarrubia, Poirier, Poirier, Read, Ricotti, Salpeter, Salvadori, Schmidt, Serna, Shetrone, Shetrone, Shetrone, Shetrone, Spano, Spekkens, Springel, Stinson, Stinson, Strigari, Sutherland, Swaters, T. Sawala, Tinsley, Tolstoy, Tolstoy, Tsujimoto, V. Hill, Valcke, Walker, Walker, Walker, Wise, Y. Revaz   +106 more
core   +9 more sources

The Progenitors of Dwarf Spheroidal Galaxies [PDF]

The Astronomical Journal, 2003
Dwarf spheroidal (dSph) galaxies present an evolutionary puzzle that we explore in 40 early- and late-type dwarfs in the Local Group and nearby field.
Bonifacio P., Carignan C., Daniel Harbeck, Davies J. I., de Boer K. S., Eskridge P. B., Eva K. Grebel, Grebel E. K., Hirashita H., Hirashita H., John S. Gallagher III, Karachentsev I., Koribalski B., Oort J. H., Phillipps S., Richer M., Skillman E. D., Tolstoy E.   +17 more
core   +5 more sources

Implications of Elemental Abundances in Dwarf Spheroidal Galaxies [PDF]

Astronomy & Astrophysics, 2005
Unusual elemental abundance patterns observed for stars belonging to nearby dwarf spheroidal (dSph) galaxies are discussed. Analysis of the [alpha/H] vs.
Alves, Audouze, Bonifacio, Cayrel, Chen, Cohen, Edvardsson, Feltzing, Fryer, Geisler, Gilmore, Grebel, Hanson, Heger, Heger, Hill, Hill, Hirschi, Hirschi, Ikuta, Ishimaru, Korn, Lanfranchi, Law, Maeda, Maeder, Mateo, Matteucci, McWilliam, McWilliam, McWilliam, Meynet, Monaco, Nagataki, Nissen, Penny, Robertson, Shetrone, Shetrone, Shigeyama, Shigeyama, Smith, T. Tsujimoto, Thielemann, Tolstoy, Tolstoy, Travaglio, Tsujimoto, Tsujimoto, Tsujimoto, Umeda, Van Dyk, Venn, Wheeler, Yamada   +54 more
core   +2 more sources

Robust bounds on ALP dark matter from dwarf spheroidal galaxies in the optical MUSE-Faint survey [PDF]

Journal of Cosmology and Astroparticle Physics, 2023
Nearby dwarf spheroidal galaxies are ideal targets in the search for indirect dark matter (DM) signals. In this work, we analyze MUSE spectroscopic observations of a sample of five galaxies, composed of both classical and ultra-faint dwarf spheroidals ...
E. Todarello, M. Regis, Javier Reynoso-Cordova, M. Taoso, D. Vaz, J. Brinchmann, M. Steinmetz, S. L. Zoutendijk   +7 more
semanticscholar   +1 more source

Proper Motions, Orbits, and Tidal Influences of Milky Way Dwarf Spheroidal Galaxies [PDF]

Astrophysical Journal, 2022
We combine Gaia early data release 3 astrometry with accurate photometry and utilize a probabilistic mixture model to measure the systemic proper motion of 52 dwarf spheroidal (dSph) satellite galaxies of the Milky Way (MW).
A. Pace, D. Erkal, Ting S. Li
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

Decaying dark matter in dwarf spheroidal galaxies: Prospects for x-ray and gamma-ray telescopes [PDF]

Physical Review D, 2021
Dwarf spheroidal galaxies are dark matter dominated systems, and as such, ideal for indirect dark matter searches. If dark matter decays into high-energy photons in the dwarf galaxies, they will be a good target for current and future generations of X ...
S. Ando, Suvendu K. Barik, Zhuo Feng, M. Finetti, Andreas Guerra Chaves, Sahaja Kanuri, Jorinde Kleverlaan, Yixuan Ma, Nicolo Maresca Di Serracapriola, Matthew S. P. Meinema, Imanol Navarro Martinez, K. Ng, Ebo Peerbooms, C. van Veen, F. Zimmer   +14 more
semanticscholar   +1 more source

Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions [PDF]

Living Reviews in Relativity, 2012
Benoit Famaey, Stacy McGaugh
exaly   +2 more sources

Structure formation models weaken limits on WIMP dark matter from dwarf spheroidal galaxies [PDF]

Physical Review D, 2020
Dwarf spheroidal galaxies that form in halo substructures provide stringent constraints on dark matter annihilation. Many ultrafaint dwarfs discovered with modern surveys contribute significantly to these constraints.
S. Ando, A. Geringer-Sameth, N. Hiroshima, S. Hoof, R. Trotta, M. Walker   +5 more
semanticscholar   +1 more source