Chemical enrichment in very low metallicity environments: Boötes I
Chemical enrichment in very low metallicity environments: Boötes I
复制标题
极低金属丰度环境中的化学富集:Boâtes I
DOI:
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
R. Leaman
中科院分区:
文献类型:
--
作者:
D. Romano;M. Bellazzini;E. Starkenburg;R. Leaman
We present different chemical evolution models for the ultrafaint dwarf galaxy Bootes I. We either assume that the galaxy accretes its mass through smooth infall of gas of primordial chemical composition (classical models) or adopt mass accretion histories derived from the combination of merger trees with semi-analytical modelling (cosmologically-motivated models). Furthermore, we consider models with and without taking into account inhomogeneous mixing in the ISM within the galaxy. The theoretical predictions are then compared to each other and to the body of the available data. From this analysis, we confirm previous findings that Bootes I has formed stars with very low efficiency but, at variance with previous studies, we do not find a clear-cut indication that supernova explosions have sustained long-lasting galactic-scale outflows in this galaxy. Therefore, we suggest that external mechanisms such as ram pressure stripping and tidal stripping are needed to explain the absence of neutral gas in Bootes I today.
DOI:
10.1088/0004-6256/135/4/1361
发表时间:
2007-08
期刊:
The Astronomical Journal
影响因子:
--
作者:
J. D. Jong;H. Rix;N. F. Martin;D. Zucker;A. Dolphin;E. F. Bell;V. Belokurov;N. W. E. Mpia;Heidelberg IoA;Cambridge Steward Obs.;Tucson
通讯作者:
J. D. Jong;H. Rix;N. F. Martin;D. Zucker;A. Dolphin;E. F. Bell;V. Belokurov;N. W. E. Mpia;Heidelberg IoA;Cambridge Steward Obs.;Tucson
影响因子:
8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者:
Wright, E. L.