Kinematics with Gaia DR2: the force of a dwarf
نویسندگان
چکیده
منابع مشابه
an investigation of the types of text reduction in subtitling: a case study of the persian film gilaneh with english subtitles
چکیده ندارد.
15 صفحه اولThe 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...
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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 کاملThe Gaia mission Pulsating stars with Gaia
Gaia is a cornerstone mission of the European Space Agency (ESA) selected in 2000, with a target launch date of 2011. The Gaia mission will perform a survey of about 1 billion sources brighter than V = 20. Its goal is to provide astrometry leading to parallaxes, proper-motions and positions. Astrometric data are complemented by multicolour photometry and a spectroscopic instrument (up to V = 17...
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...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2019
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stz2343