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J/other/AstBu/69.247 Lynx-Cancer void galaxies photometry (Perepelitsyna+, 2014)
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lc_photo.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/other/AstBu/69.247
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Beginning of ReadMe :J/other/AstBu/69.247 Galaxies in Lynx-Cancer void (Perepelitsyna+, 2014)
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Study of galaxies in the Lynx-Cancer void. IV. Photometrical properties.
Perepelitsyna Y.A., Pustilnik S.A., Kniazev A.Y.
<Astrophys. Bull., 69.247 (2014)>
=2014AstBu..69..247P
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ADC_Keywords: Galaxies, photometry ; Fundamental catalog ; Photometry, ugriz
Keywords: galaxies: photometry - galaxies: fundamental parameters -
galaxies: evolution -
Abstract:
In this work we present the results of photometrical study of 85
objects from the updated sample of galaxies residing in the nearby
Lynx-Cancer void. The images in filters u,g,r,i from the Sloan Digital
Sky Survey database are used for photometry. The following
model-independent parameters are obtained: integrated magnitudes and
colours, effective radii and the respective surface brightnesses,
optical and Holmberg radii. On results of the radial surface
brightness profile analysis, their central values and scalelengths of
model discs are derived. The colours of the outer parts of void
galaxies are examined and compared to those of the model evolutionary
tracks of the PEGASE2 package. This allowed to obtain estimates of the
time since the epoch of star formation T_SF_. Among the latter group,
the low-luminosity objects with M_B_>-13.2 dominate. The derived
integrated absolute magnitudes and colours are used for galaxy stellar
mass estimates. All available data on integrated galaxy HI fluxes are
used to derive their parameter M(HI)/L_B_ and to estimate their gas
mass-fraction. The small 10% subgroup of the most gas-rich galaxies,
with M(HI)/L_B_>2.5, shows gas mass-fractions reaching (94-99)%.
Many of these objects also show atypically blue colours of their outer
parts. To check possible statistical differences of void galaxy
properties and galaxy samples formed with more general criteria, we
compared the void sample galaxy parameters with those of 195 galaxies
from the Equatorial Survey (ES), formed as a part of the blind HI
survey HIPASS. In the common luminosity range (-18.5<M_g_<-13.5)
the compared samples show similarity. The lowest luminosity void
galaxies differ from the main ES sample. However, there are also 7%
faint so called 'inchoate' galaxies among ES sample with the elevated
parameter M(HI)/L_B_, majority of which are situated far from massive
neighbours and are probably the analogs of void galaxies.
Description:
We present the results of photometrical study of 85 objects from the
updated sample of galaxies residing in the nearby Lynx-Cancer void.