J/ApJ/787/24 Structural parameters of true edge-on galaxies (Bizyaev+, 2014)
The catalog of edge-on disk galaxies from SDSS.
I. The catalog and the structural parameters of stellar disks.
Bizyaev D.V., Kautsch S.J., Mosenkov A.V., Reshetnikov V.P.,
Sotnikova N.YA., Yablokova N.V., Hillyer R.W.
<Astrophys. J., 787, 24 (2014)>
=2014ApJ...787...24B 2014ApJ...787...24B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Photometry, SDSS ; Morphology ;
Radial velocities
Keywords: galaxies: fundamental parameters - galaxies: general -
galaxies: photometry - galaxies: spiral - galaxies: structure
Abstract:
We present a catalog of true edge-on disk galaxies automatically
selected from the Seventh Data Release of the Sloan Digital Sky Survey
(SDSS, Cat. II/294). A visual inspection of the g, r, and i images of
about 15000 galaxies allowed us to split the initial sample of
edge-on galaxy candidates into 4768 (31.8% of the initial sample)
genuine edge-on galaxies, 8350 (55.7%) non-edge-on galaxies, and 1865
(12.5%) edge-on galaxies not suitable for simple automatic analysis
because these objects either show signs of interaction and warps, or
nearby bright stars project on it. We added more candidate galaxies
from RFGC, EFIGI, RC3, and Galaxy Zoo catalogs found in the SDSS
footprints. Our final sample consists of 5747 genuine edge-on
galaxies. We estimate the structural parameters of the stellar disks
(the stellar disk thickness, radial scale length, and central surface
brightness) in the galaxies by analyzing photometric profiles in each
of the g, r, and i images. We also perform simplified three-dimensional
modeling of the light distribution in the stellar disks of edge-on
galaxies from our sample. Our large sample is intended to be used for
studying scaling relations in the stellar disks and bulges and for
estimating parameters of the thick disks in different types of
galaxies via the image stacking. In this paper, we present the sample
selection procedure and general description of the sample.
Description:
The initial sample of candidates to edge-on galaxies was automatically
selected from the SDSS Seventh Data Release (DR7; Abazajian et al.
2009ApJS..182..543A 2009ApJS..182..543A, Cat. II/294) using its Catalog Access Server
query tools. The selection criteria are discussed in detail by
Kautsch et al. (2006, J/A+A/445/765; 2006A&A...451.1171K 2006A&A...451.1171K) and Kautsch
(2009AN....330..100K 2009AN....330..100K). This selection was based on the axial ratio,
angular diameter, magnitude, and color limits. Flagged galaxies and
objects with extreme magnitude errors were not included. The SDSS query
was tailored to select relatively bright galaxies with apparent
Petrosian magnitudes in the g band less than 20 mag using the Petrosian
flux; galaxies with angular major-axis diameters larger than 30 arcsec
based upon isoA_g, the isophotal major axis given in SDSS in g band;
and "flat" galaxies with an axis ratio >3 in the g band, which is defined
by the isophotal axes isoA_g divided by isoB_g. The objects are also
selected in certain (-0.5≤g-r≤2) and (-0.5≤r-i≤2) color ranges.
The use of the color ranges in reddening-corrected Petrosian magnitudes
allows to prevent the inclusion of galaxies with unusual colors caused
by active galactic nuclei, instrument flaws, or ghost images.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 139 17189 The Structural Parameters of True Edge-on
Galaxies from the 1-D Analysis
table6.dat 38 3912 The Structural Parameters of true Edge-on
Galaxies in the r-band from our 3-D Analysis
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See also:
II/294 : The SDSS Photometric Catalog, Release 7
(Adelman-McCarthy+, 2009)
J/A+A/389/795 : Vertical structure of edge-on galaxies (Bizyaev+, 2002)
J/A+A/445/765 : A Catalog of Edge-on Disk Galaxies (Kautsch+, 2006)
J/ApJ/702/1567 : Structure of 2MASS edge-on galaxies (Bizyaev+, 2009)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Name EGIS Name (G1)
21 A1 --- Band [gri] Band used in the observation
23- 32 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
34- 43 F10.6 deg DEdeg Declination in decimal degrees (J2000)
45- 50 F6.2 deg PA Position angle
52- 57 F6.2 arcsec h Scale length
59- 64 F6.2 arcsec e_h Uncertainty in h
66- 70 F5.2 arcsec z0 Scale height
72- 76 F5.2 arcsec e_z0 Uncertainty in z0
78- 82 F5.2 mag/arcsec2 S0 Face-on central surface brightness
84- 87 F4.2 mag/arcsec2 e_S0 Uncertainty in S0
89- 95 F7.3 --- gradz0 Vertical gradient of scale height (1)
97-101 F5.2 mag mag Total uncorrected galaxy magnitude
in Band (2)
103-106 F4.2 --- B/T Bulge to total ratio
108-109 A2 --- Type Morphological galaxy type
111-115 I5 km/s RV ?=-1 Heliocentric radial velocity
117-139 A23 --- AName Alternative identifier
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Note (1): Normalized by the scale ratio (dz0/dr*(h/z0)).
Note (2): Estimated by integration within the encompassing ellipse.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Name EGIS Name (G1)
21- 26 F6.3 arcsec h Scale length
28- 32 F5.3 arcsec z0 Scale height
34- 38 A5 mag/arcsec2 S0 Face-on central surface brightness
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Global notes:
Note (G1): EGIS (Edge-on Galaxies In SDSS) name, EONRAdegDEdeg.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 22-Jun-2017