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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 (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, 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) and Kautsch (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:
FileName Lrecl Records Explanations
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
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
Bytes Format Units Label Explanations
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
Note (1): Normalized by the scale ratio (dz0/dr*(h/z0)). Note (2): Estimated by integration within the encompassing ellipse.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
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
Global notes: Note (G1): EGIS (Edge-on Galaxies In SDSS) name, EONRAdegDEdeg.
History: From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 22-Jun-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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