Quantified H I morphology - VII. Star formation and tidal influence on local dwarf H I morphology
نویسندگان
چکیده
منابع مشابه
PHOTODISSOCIATION AND THE MORPHOLOGY OF H i IN GALAXIES
Young massive stars produce Far-UV photons which dissociate the molecular gas on the surfaces of their parent molecular clouds. Of the many dissociation products which result from this “back-reaction”, atomic hydrogen H i is one of the easiest to observe through its radio 21-cm hyperfine line emission. In this paper I first review the physics of this process and describe a simplified model whic...
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A study of the morphological properties and star formation rates (SFRs) of H ii regions located along the bars of a sample of eleven late-type barred systems is presented and compared with numerical simulations. According to the relative intensity of star formation along the bar with respect to that of the nuclear region, three types of distributions are observed. They may be related to the age...
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Tidal Dwarf Galaxies (TDGs) are objects presently forming from gas which has been expelled from their parent galaxies during an interaction. We observed the CO emission of a sample of 11 TDGs, of which 8 were detected. The CO is found at the peak of the HI observations and has the same line velocity and width, indicating that the molecular gas is forming in situ instead of being torn from the p...
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Star formation may take place in a variety of locations in interacting systems: in the dense core of mergers, in the shock regions at the interface of the colliding galaxies and even within the tidal debris expelled into the intergalactic medium. Along tidal tails, objects may be formed with masses ranging from those of super-star clusters to dwarf galaxies: the so-called Tidal Dwarf Galaxies (...
متن کاملTHE LOCAL H i MASS FUNCTION
The local H i mass function (HiMF), like the optical luminosity function, is an important observational input into models of cosmology and galaxy evolution. It is a helpful framework for assessing the number density of gas rich dwarf galaxies, which are easily missed in optically selected galaxy samples, as well as for determining the cosmological density of neutral gas at the present epoch. Fo...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2013
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stt1291