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Date and Time of the Query: 2019-05-22 T22:11:09 PDT
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For refcode 1999A&AS..139...97K:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1999A&AS..139...97K HI properties of nearby galaxies from a volume-limited sample. KARACHENTSEV I.D., MAKAROV D.I., HUCHTMEIER W.K. Received May 25; accepted July 1, 1999 Abstract: We consider global HI and optical properties of about three hundred nearby galaxies with V_0_ < 500 km s^-1^. The majority of them have individual photometric distance estimates. The galaxy sample parameters show some known and some new correlations implying a meaningful dynamic explanation: 1) In the whole range of diameters, 1-40Kpc, the galaxy standard diameter and rotational velocity follows a nearly linear Tully-Fisher relation, logA_25_ is proportional to (0.99+/-0.06)logV_m_ . 2) The HI mass-to-luminosity ratio and the HI mass-to-"total" mass (inside the standard optical diameter) ratio increase systematically from giant galaxies towards dwarfs, reaching maximum values 5 M_sun_/L_sun_ and 3, respectively. 3) For all the Local Volume galaxies their total mass-to- luminosity ratio lies within a range of [0.2-16]M_sun_/L_sun_ with a median of 3.0M_sun_/L_sun_. The M_25_/L ratio decreases slightly from giant towards dwarf galaxies. 4) The M_HI_/L and M_25_/L ratios for the sample galaxies correlate with their mean optical surface brightness, which may be caused by star formation activity in the galaxies. 5) The M_HI_/L and M_25_/L ratios are practically independent of the local mass density of surrounding galaxies within the range of densities of about six orders of magnitude. 6) For the LV galaxies their HI mass and angular momentum follow a nearly linear relation: logM_HI_ is proportional to (0.99+/-0.04)log(V_m_ .A_25_), expected for rotating gaseous disks being near the threshold of gravitational instability, favourable for active star formation. Keywords: galaxies: global HI parameters - galaxies
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