منابع مشابه
THE H i KINEMATICS AND DISTRIBUTION OF FOUR BLUE COMPACT DWARF GALAXIES
We present VLAH i observations of the blue compact dwarf (BCD) galaxies NGC 2366, NGC 4861, VII Zw 403, and Haro 2. These galaxies span a range of BCD morphological types. The cometary-like BCDs NGC 2366 and NGC 4861 have regular rotational kinematics with a V= of 8.7 and 6.4, respectively. On the other hand, the velocity fields of the iE BCD VII Zw 403 and of the nE BCD Haro 2 lack regularity,...
متن کاملKinematics of Extremely Faint Dwarf Galaxies
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...
متن کاملThe Kinematics of Dwarf Spheroidal Galaxies
I review observational data on the kinematic properties of dwarf spheroidal galaxies in the halo of the Milky Way and beyond. The present data confirm previous claims that these small galaxies have unusually large central velocity dispersions. ‘Simple’ sources of bias such as binary stars, internal atmospheric motions, measurement errors and small sample sizes cannot explain the large dispersio...
متن کاملThe Internal Kinematics of Dwarf Spheroidal Galaxies
The status of kinematic observations in Local Group dwarf spheroidal galaxies (dSphs) is reviewed. Various approaches to the dynamical modelling of these data are discussed and some general features of dSph dark matter haloes based on simple mass models are presented.
متن کاملInternal Kinematics of Dwarf Spheroidal Galaxies
We discuss the quality of kinematic data in dwarf spheroidal galaxies, the current interpretations of those data, and prospects for actually deriving the mass profile in these galaxies. We then discuss stellar populations constraints on some of the models that attempt to explain the kinematics and formation of the dSph’s.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2013
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/765/2/136