/ftp/cats/J_other/AstBu/68.243



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J/other/AstBu/68.243  Star formation in isolated galaxies  (Karachentsev+, 2013)
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Beginning of ReadMe : J/other/AstBu/68.243 Star formation in isolated galaxies (Karachentsev+, 2013) ================================================================================ Star formation in nearby isolated galaxies. Karachentsev I.D., Karachentseva V.E., Melnyk O.V., Courtois H.M. <Astrophys. Bull., 68, 243 (2013)> =2013AstBu..68..243K ================================================================================ ADC_Keywords: Galaxies, nearby ; Magnitudes ; Ultraviolet ; H I data ; Morphology Keywords: galaxies: star formation Abstract: We use the FUV fluxes measured with the GALEX to study the star formation properties of galaxies collected in the Local Orphan Galaxies catalog (LOG, 2011AstBu..66....1K). Among 517 LOG galaxies having radial velocities V_LG_<3500km/s and Galactic latitudes |b|>15deg, 428 objects have been detected in FUV. We briefly discuss some scaling relations between the specific star formation rate (SSFR) and stellar mass, HI-mass, morphology, and surface brightness of galaxies situated in extremely low density regions of the Local Supercluster. Our sample is populated with predominantly late-type, gas-rich objects with the median morphological type of Sdm. Only 5% of LOG galaxies are classified as early types: E, S0, S0/a, however, they systematically differ from normal E and S0 galaxies by lower luminosity and presence of gas and dust. We find that almost all galaxies in our sample have their SSFR below 0.4Gyr^-1^. This limit is also true even for a sample of 260 active star-burst Markarian galaxies situated in the same volume. The existence of such a quasi-Eddington limit for galaxies seems to be a key factor which characterizes the transformation of gas into stars at the current epoch. Description: The updated Local Orphan Galaxies (LOG) catalog is presented in Table 1. The LOGs was formed from the sample of galaxies in vicinity of the Local Supercluster on scale about 40Mpc. It collected data, including B-magnitudes, from NED and LEDA with some our own corrections and additions. The catalog contains the data of star formation rates for 517 LOG galaxies.

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