Local Group ultra-faint dwarf galaxies in the reionization era
نویسندگان
چکیده
منابع مشابه
Reionization of the Local Group of Galaxies
We present the first detailed structure formation and radiative transfer simulations of the reionization history of our cosmic neighbourhood. To this end, we follow the formation of the Local Group of galaxies and nearby clusters by means of constrained simulations, which use the available observational constraints to construct a representation of those structures which reproduces their actual ...
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The Local Group contains some dwarf galaxies that apparently formed all their stars early, lost their gas to winds or ionization, and survive today as “fossils” from the epoch of reionization. This study presents new models of these objects based on the hierarchical chemical evolution framework of Tumlinson (2006). The model accurately reproduces the observed luminosity-metallicity relation of ...
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Abstract. We present the results of deep, high velocity resolution (∼1.6 kms−1) Giant Meterwave Radio Telescope (GMRT) HI 21cm observations of extremely faint (MB > −12.5) dwarf irregular galaxies. We find that all of our sample galaxies show systematic large scale velocity gradients, unlike earlier studies which found chaotic velocity fields for such faint galaxies. For some of the sample gala...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2017
ISSN: 1745-3925,1745-3933
DOI: 10.1093/mnrasl/slx043