The Baryon Content of Extremely Low Mass Dwarf Galaxies
نویسندگان
چکیده
منابع مشابه
The Baryon Content of Extremely Low Mass Dwarf Galaxies
We investigate the gas content and baryonic Tully-Fisher relationship for extremely low luminosity dwarf galaxies in the absolute magnitude range−13.5 > Mr − 5 log10 h70 > −16. The sample is selected from the Sloan Digital Sky Survey and consists of 101 galaxies for which we have obtained follow-up HI observations using the Arecibo Observatory and Green Bank Telescope. This represents the large...
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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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We study Tully Fisher relations for a sample that combines extremely faint (MB < −14.) galaxies along with bright (i.e. ∼ L∗) galaxies. Accurate (∼ 10%) distances, I band photometry, and B-V colors are known for the majority of the galaxies in our sample. The faint galaxies are drawn from the Faint Irregular Galaxy GMRT survey (FIGGS), and we have HI rotation velocities derived from aperture sy...
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We present results of deep, high velocity resolution (∼1.6 kms−1) Giant Meterwave Radio Telescope (GMRT) HI 21 cm-line observations of a sample of extremely faint (MB > −12.5) dwarf irregular galaxies. Unlike previous studies, we find large scale velocity gradients in even the faintest galaxies of our sample i.e. their velocity fields are not “chaotic”. For some of our sample galaxies, where th...
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Aims. The goal of this study is to measure parameters of the integrated H emission for twenty-two dwarf galaxies with oxygen abundance 12+log(O/H) in the range of 7.42 to 7.65, which are representatives of the eXtremely Metal-Deficient (XMD) galaxy group. Some of them are expected to be similar to the well-known candidates for local young galaxies, I Zw 18 and SBS 0335−052 that have most of t...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/508604