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- W2087466990 endingPage "A85" @default.
- W2087466990 startingPage "A85" @default.
- W2087466990 abstract "We study dwarf galaxies in the Centaurus A group to investigate their metallicity and possible environmental effects. The Centaurus A group (at ~4 Mpc from the Milky Way) contains about 50 known dwarf companions of different morphologies and stellar contents, thus making it a very interesting target to study how these galaxies evolve. Here we present results for the early-type dwarf galaxy population in this group. We use archival HST/ACS data to study the resolved stellar content of 6 galaxies, together with isochrones from the Dartmouth stellar evolutionary models. We derive photometric metallicity distribution functions of stars on the upper red giant branch via isochrone interpolation. The 6 galaxies are moderately metal-poor (<[Fe/H]>=-1.56 to -1.08), and metallicity spreads are observed (internal dispersions of sigma_[Fe/H]=0.10 to 0.41 dex). We also investigate the possible presence of intermediate-age stars, and discuss how these affect our results. The dwarfs exhibit flat to weak radial metallicity gradients. For the two most luminous, most metal-rich galaxies, we find statistically significant evidence for at least two stellar subpopulations: the more metal-rich stars are found in the center of the galaxies, while the metal-poor ones are more broadly distributed within the galaxies. We find no clear trend of the derived physical properties as a function of (present-day) galaxy position in the group, which may be due to the small sample we investigate. We compare our results to the early-type dwarf population of the Local Group, and find no outstanding differences, despite the fact that the Centaurus A group is a denser environment that is possibly in a more advanced dynamical stage." @default.
- W2087466990 created "2016-06-24" @default.
- W2087466990 creator A5001708932 @default.
- W2087466990 creator A5026801133 @default.
- W2087466990 creator A5046542505 @default.
- W2087466990 date "2010-06-01" @default.
- W2087466990 modified "2023-10-16" @default.
- W2087466990 title "A close look at the Centaurus A group of galaxies" @default.
- W2087466990 cites W1496377183 @default.
- W2087466990 cites W1544466432 @default.
- W2087466990 cites W1678027552 @default.
- W2087466990 cites W1778292155 @default.
- W2087466990 cites W1940474904 @default.
- W2087466990 cites W1964280853 @default.
- W2087466990 cites W1964631720 @default.
- W2087466990 cites W1968608320 @default.
- W2087466990 cites W1970064335 @default.
- W2087466990 cites W1970841308 @default.
- W2087466990 cites W1972832250 @default.
- W2087466990 cites W1977330688 @default.
- W2087466990 cites W1981124394 @default.
- W2087466990 cites W1986366408 @default.
- W2087466990 cites W1990024384 @default.
- W2087466990 cites W1996619925 @default.
- W2087466990 cites W1996737323 @default.
- W2087466990 cites W2000184611 @default.
- W2087466990 cites W2006855172 @default.
- W2087466990 cites W2008996015 @default.
- W2087466990 cites W2013403927 @default.
- W2087466990 cites W2016888075 @default.
- W2087466990 cites W2016891146 @default.
- W2087466990 cites W2017886612 @default.
- W2087466990 cites W2019768592 @default.
- W2087466990 cites W2020072647 @default.
- W2087466990 cites W2025473246 @default.
- W2087466990 cites W2027372417 @default.
- W2087466990 cites W2027814370 @default.
- W2087466990 cites W2028143061 @default.
- W2087466990 cites W2030377406 @default.
- W2087466990 cites W2034457553 @default.
- W2087466990 cites W2034645884 @default.
- W2087466990 cites W2044861501 @default.
- W2087466990 cites W2046339465 @default.
- W2087466990 cites W2048109974 @default.
- W2087466990 cites W2048999936 @default.
- W2087466990 cites W2050756618 @default.
- W2087466990 cites W2055327934 @default.
- W2087466990 cites W2058804003 @default.
- W2087466990 cites W2059408266 @default.
- W2087466990 cites W2063973846 @default.
- W2087466990 cites W2064235661 @default.
- W2087466990 cites W2066647802 @default.
- W2087466990 cites W2070031343 @default.
- W2087466990 cites W2071992528 @default.
- W2087466990 cites W2077067343 @default.
- W2087466990 cites W2078375698 @default.
- W2087466990 cites W2078741862 @default.
- W2087466990 cites W2083975149 @default.
- W2087466990 cites W2084216078 @default.
- W2087466990 cites W2085384948 @default.
- W2087466990 cites W2092618804 @default.
- W2087466990 cites W2096173928 @default.
- W2087466990 cites W2098720855 @default.
- W2087466990 cites W2103370723 @default.
- W2087466990 cites W2111817932 @default.
- W2087466990 cites W2113340703 @default.
- W2087466990 cites W2115001920 @default.
- W2087466990 cites W2121345418 @default.
- W2087466990 cites W2128705820 @default.
- W2087466990 cites W2131462302 @default.
- W2087466990 cites W2131939233 @default.
- W2087466990 cites W2140961636 @default.
- W2087466990 cites W2142471547 @default.
- W2087466990 cites W2148966198 @default.
- W2087466990 cites W2153223411 @default.
- W2087466990 cites W2155940945 @default.
- W2087466990 cites W2156046540 @default.
- W2087466990 cites W2162883815 @default.
- W2087466990 cites W2165364012 @default.
- W2087466990 cites W2165372548 @default.
- W2087466990 cites W2168213648 @default.
- W2087466990 cites W2168664302 @default.
- W2087466990 cites W2176131481 @default.
- W2087466990 cites W3098232691 @default.
- W2087466990 cites W3099098644 @default.
- W2087466990 cites W3099168261 @default.
- W2087466990 cites W3099719843 @default.
- W2087466990 cites W3099753981 @default.
- W2087466990 cites W3100312073 @default.
- W2087466990 cites W3100471000 @default.
- W2087466990 cites W3100948304 @default.
- W2087466990 cites W3101199419 @default.
- W2087466990 cites W3101265438 @default.
- W2087466990 cites W3102151555 @default.
- W2087466990 cites W3102246252 @default.
- W2087466990 cites W3102340708 @default.
- W2087466990 cites W3103810817 @default.
- W2087466990 cites W3103956180 @default.