Results 51 to 60 of about 635,824 (185)

Dissipative phenomena in extended-bodies interactions I: Methods Dwarf galaxies of the Local Group and their synthetic CMDs [PDF]

, 2011
Dissipative phenomena occurring during the orbital evolution of a dwarf satellite galaxy around a host galaxy may leave signatures in the star formation activity and signatures in the colour magnitude diagram of the galaxy stellar content. Our goal is to
Anderson, Arnaud, Berczik, Bertelli, Bertelli, Bertelli, Bertelli, Bigiel, Binney, Bono, Bradamante, Bressan, Brüns, Bureau, Burkert, Butcher, Byrd, C. Chiosi, Cavaliere, Chiosi, Cioffi, Cole, Couch, Crnojević, Davies, De Lucia, Dressler, Dressler, E. K. Grebel, Einasto, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Ettori, Evrard, Fagotto, Fagotto, Ferrara, Fujita, Fujita, Fukugita, G. Bertelli, Gallart, Girardi, Girardi, Gnedin, Goto, Grcevich, Grebel, Gunn, Heitsch, Henriksen, Iliev, Kalberla, Kallivayalil, Kang, Kaufmann, Klessen, Klimentowski, Koch, Koch, Krumholz, Krumholz, Krumholz, Krumholz, Livio, Maller, Maloney, Mayer, McKee, Metz, Mohr, Moore, Moore, Moore, Moore, Mori, Murali, Murray, Nagashima, Navarro, Navarro, Ng, Nichols, Nidever, Nulsen, Oemler, Orban, Pasetto, Pasetto, Pasetto, Pasetto, Phillipps, Portinari, Press, Putman, Quilis, Quilis, Quilis, Rasmussen, Read, Richter, Rizzi, Roediger, Roediger, Roediger, S. Pasetto, Savage, Sembach, Somerville, Sommer-Larsen, Stanimirović, Steinmetz, Surdin, Tonnesen, Tumlinson, Valluri, van den Bergh, White, White, Y. Fujita, Zhao   +122 more
core   +1 more source

Astrophysical site(s) of r-process elements in galactic chemodynamical evolution model

EPJ Web of Conferences, 2016
Astrophysical site(s) of rapid neutron-capture process (r-process) is (are) not identified yet. Although core-collapse supernovae have been regarded as one of the possible candidates of the astrophysical site of r-process, nucleosynthesis studies suggest
Hirai Yutaka, Ishimaru Yuhri, Saitoh Takayuki R., Fujii Michiko S., Hidaka Jun, Kajino Toshitaka   +5 more
doaj   +1 more source

The Kinematics of the Ultra-Faint Milky Way Satellites: Solving the Missing Satellite Problem [PDF]

, 2007
We present Keck/DEIMOS spectroscopy of stars in 8 of the newly discovered ultra-faint dwarf galaxies around the Milky Way. We measure the velocity dispersions of Canes Venatici I and II, Ursa Major I and II, Coma Berenices, Hercules, Leo IV and Leo T ...
Ibata R., Irwin M., Joshua D. Simon, Kauffmann G., Marla Geha, Saviane I., Strigari L. E.   +6 more
core   +2 more sources

The M101 group complex: new dwarf galaxy candidates and spatial structure [PDF]

, 2017
The fine details of the large-scale structure in the local universe provide important empirical benchmarks for testing cosmological models of structure formation. Dwarf galaxies are key object for such studies.
Binggeli, Bruno, Jerjen, Helmut, Müller, Oliver, Scalera, Roberto   +3 more
core   +2 more sources

Dynamical friction in dwarf galaxies [PDF]

, 1998
We present a simplified analytic approach to the problem of the spiraling of a massive body orbiting within the dark halo of a dwarf galaxy. This dark halo is treated as the core region of a King distribution of dark matter particles, in consistency with
Gilmore, Gerard, Hernandez, X.
core   +3 more sources

3-3-1 Self interacting dark matter and the galaxy core-cusp problem [PDF]

, 2018
The core-cusp problem remains as a challenging discrepancy between observations and simulations in the standard $\Lambda$CDM model for the formation of galaxies.
Q. Nguyen, G. Mathews, L. A. Phillips, Miguel Correa, I. Suh, J. Coughlin   +5 more
semanticscholar   +1 more source

Can Photoionization Squelching Resolve the Sub-structure Crisis? [PDF]

Astrophys.J.572:L23-L26,2002, 2001
Cold Dark Matter theory predicts that the Local Group should contain many more dwarf-sized objects than the observed number of dwarf galaxies --- the so-called sub-structure problem. We investigate whether the suppression of star formation in these small objects due to the presence of a photoionizing background can resolve the problem.
arxiv   +1 more source

Feedback by Massive Black Holes in Dwarf Galaxies [PDF]

, 2017
Could there be intermediate mass black holes in essentially all old dwarf galaxies? I argue that current observations of Active Galactic Nuclei in dwarfs allow such a radical hypothesis which provides early feedback and potentially provides a unifying explanation for many if not all of the apparent dwarf galaxy anomalies, such as the abundance, core ...
arxiv   +1 more source

The curious case of the companion: evidence for cold accretion onto a dwarf satellite near the isolated elliptical NGC 7796

, 2018
The isolated elliptical (IE) NGC 7796 is accompanied by an interesting early-type dwarf galaxy, named NGC7796-DW1. It exhibits a tidal tail, very boxy isophotes, and multiple nuclei or regions (A, B, and C) that are bluer than the bulk population of the ...
Gómez, M., Hilker, M., Lane, R., Puzia, T. H., Richtler, T., Salinas, R., Voggel, K.   +6 more
core   +1 more source

Chemical Abundance Constraints on White Dwarfs as Halo Dark Matter [PDF]

, 1999
We examine the chemical abundance constraints on a population of white dwarfs in the Halo of our Galaxy. We are motivated by microlensing evidence for massive compact halo objects (Machos) in the Galactic Halo, but our work constrains white dwarfs in the
Brian D. Fields, David S. Graff, Katherine Freese, Linsky J., Renault C., Tinsley B.   +5 more
core   +2 more sources