THE EVOLUTIONARY HISTORY OF LOW-LUMINOSITY LOCAL GROUP DWARF GALAXIES

被引：109

作者：

VANDENBERGH, S

机构：

[1] Dominion Astrophysical Observatory, National Research Council, Victoria, BC V8X 4M6

来源：

ASTROPHYSICAL JOURNAL | 1994年 / 428卷 / 02期

关键词：

GALAXIES; EVOLUTION; STELLAR CONTENT; LOCAL GROUP;

D O I：

10.1086/174270

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The stellar content of Local Group dwarfs fainter than M(v) = -14.0 is found to correlate with distance from the Galaxy (or M31). Dwarf spheroidals located close to the Galaxy, such as Ursa Minor and Draco, only experienced star formation early in their lifetimes. Dwarf spheroidals at intermediate distances, like Leo I, Fornax, and Carina, underwent significant star formation more recently. Finally, star formation is presently still going on in distant dwarfs such as DDO 210 and Phoenix. Leo II and Tucana are, however, dwarfs that do not conform to this pattern. It is tentatively suggested that ram pressure stripping, strong supernova-driven winds, or a high UV flux form the protoGalaxy (or proto-M31) might have removed gas from dwarf galaxies at small galactocentric distances.

引用

页码：617 / 619

页数：3

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