Results 11 to 20 of about 30,924 (78)

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

The orientation and kinematics of inner tidal tails around dwarf galaxies orbiting the Milky Way [PDF]

, 2009
Using high-resolution collisionless N-body simulations we study the properties of tidal tails formed in the immediate vicinity of a two-component dwarf galaxy evolving in a static potential of the Milky Way (MW).
Battaglia, Choi, Coleman, Coleman, Combes, Dehnen, Den Hartog, Diemand, Dinescu, Ewa L. ŁOkas, Francisco Prada, Gary A. Mamon, Ghigna, Jarosław Klimentowski, Johnston, Johnston, Kazantzidis, Klimentowski, Klimentowski, Klypin, Kravtsov, Kroupa, Lucio Mayer, Martínez-Delgado, Mayer, Mayer, McConnachie, Montuori, Muñoz, Muñoz, Peñarrubia, Piatek, Piatek, Ricotti, Sawala, Sohn, Stelios Kazantzidis, Tassis, Tolstoy, Walker, ŁOkas, ŁOkas, ŁOkas, ŁOkas   +43 more
core   +3 more sources

Lambda-Cold Dark Matter, Stellar Feedback, and the Galactic Halo Abundance Pattern [PDF]

, 2005
(Abridged) The hierarchical formation scenario for the stellar halo requires the accretion and disruption of dwarf galaxies, yet low-metallicity halo stars are enriched in alpha-elements compared to similar, low-metallicity stars in dwarf spheroidal ...
Andreea S. Font, Bondi H., Brant Robertson, Devriendt J. E. G., Gratton R. G., Gratton R. G., Gratton R. G., Greggio L., Hill V., Hill V., Hill V., Hill V., James S. Bullock, Jasniewicz G., Kathryn V. Johnston, Lacey C., Lars Hernquist, Matteucci F., Matteucci F., Matteucci F., Moore B., Nissen P. E., Pagel B. E. J., Schaller G., Tinsley B. M., Tinsley B. M., Tsujimoto T., Unavane M.   +27 more
core   +2 more sources

Environmental effect on the subhalo abundance -- a solution to the missing dwarf problem

, 2008
Recent high-resolution simulations of the formation of dark-matter halos have shown that the distribution of subhalos is scale-free, in the sense that if scaled by the velocity dispersion of the parent halo, the velocity distribution function of galaxy ...
Fukushige, Toshiyuki, Ishiyama, Tomoaki, Makino, Junichiro   +2 more
core   +1 more source

The ACS LCID Project XI. On the early time resolution of LG dwarf galaxy SFHs: Comparing the effects of reionization in models with observations [PDF]

, 2016
The analysis of the early star formation history (SFH) of nearby galaxies, obtained from their resolved stellar populations is relevant as a test for cosmological models.
Aparicio, Antonio, Bernard, Edouard, Cassisi, Santi, Cole, Andrew, Dolphin, Andrew, Gallart, Carme, Hidalgo, Sebastian L., Mayer, Lucio, Monelli, Matteo, Navarro, Julio, Skillman, Evan, Stetson, Peter, Weisz, Daniel   +12 more
core   +3 more sources

New dwarf galaxy candidates in the Centaurus group

, 2015
Recent studies of the distribution and kinematics of the Milky Way and Andromeda satellite galaxy systems have confirmed the existence of coplanar, corotating structures of galaxies. In addition to the 'missing satellite problem', these structures pose a
Binggeli, Bruno, Jerjen, Helmut, Müller, Oliver   +2 more
core   +1 more source

Star formation histories of dwarf galaxies from the Colour-Magnitude diagrams of their resolved stellar populations [PDF]

, 2009
In this tutorial paper we summarize how the star formation (SF) history of a galactic region can be derived from the colour-magnitude diagram (CMD) of its resolved stars.
Cignoni, Michele, Tosi, Monica
core   +4 more sources

Galactic and Cosmic Chemical Evolution with Hypernovae

, 2005
We provide new nucleosynthesis yields depending on metallicity and energy (i.e., (normal supernovae and hypernovae), and show the evolution of heavy element abundances from C to Zn in the solar neighborhood.
Kobayashi, Chiaki
core   +1 more source

Dwarf Galaxies in Voids: Dark Matter Halos and Gas Cooling [PDF]

, 2010
Galaxy surveys have shown that luminous galaxies are mainly distributed in large filaments and galaxy clusters. The remaining large volumes are virtually devoid of luminous galaxies.
Gottloeber, Stefan, Hoeft, Matthias
core   +3 more sources

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +1 more source