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J/ApJ/702/1567       Structure of 2MASS edge-on galaxies        (Bizyaev+, 2009)

Structural parameters of stellar disks from Two Micron All Sky Survey images of edge-on galaxies. Bizyaev D., Mitronova S. <Astrophys. J., 702, 1567-1574 (2009)> =2009ApJ...702.1567B
ADC_Keywords: Galaxies, IR ; Morphology Keywords: galaxies: halos - galaxies: photometry - galaxies: spiral - galaxies: structure - infrared: galaxies Abstract: We present results of an analysis of the J, H, and Ks Two Micron All Sky Survey (2MASS) images of 139 spiral edge-on galaxies selected from the Revised Flat Galaxies Catalog. The basic structural parameters scale length (h), scale height (z0), and central surface brightness of the stellar disks (µ0) are determined for all selected galaxies in the near-infrared (NIR) bands. The mean relative ratios of the scale heights of the thin stellar disks in the J:H:Ks bands are 1.16:1.08:1.00, respectively. Comparing the scale heights obtained from the NIR bands for the same objects, we estimate the scale heights of the thin stellar disks corrected for the internal extinction. We find that the extinction-corrected scale height is, on average, 11% smaller than that in the K band. Using the extinction-corrected structural parameters, we find that the dark-to-luminous mass ratio is, on average, 1.3 for the galaxies in our sample within the framework of a simplified galactic model. The relative thicknesses of the stellar disks z0/h correlates with their face-on central surface brightnesses obtained from the 2MASS images. We also find that the scale height of the stellar disks shows no systematic growth with radius in most of our galaxies. Description: As a predefined sample of edge-on galaxies, the Revised Flat Galaxies Catalog (RFGC; Karachentsev et al. 1999, Cat. VII/219) is chosen. To secure enough pixels for studying the vertical structure, we select objects with the major axis greater than 1 arcmin. This size is estimated directly from the 2MASS images (Cat. VII/233) at the level of S/N∼3. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 61 139 The structural parameters of the galaxies
See also: VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) VII/219 : Revised Flat Galaxy Catalogue (RFGC) (Karachentsev+, 1999) J/A+A/389/795 : Vertical structure of edge-on galaxies (Bizyaev+, 2002) J/other/BSAO/50.5 : Velocities of RFGC galaxies (Karachentsev+, 2000) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [RFGC] 5- 8 I4 --- RFGC Galaxy name 10- 13 F4.2 kpc hK Scalelength in the Ks band 15- 18 F4.2 kpc e_hK Uncertainty in hK 20- 23 F4.2 kpc z0K Scaleheight in the Ks band 25- 28 F4.2 kpc e_z0K Uncertainty in z0K 30- 34 F5.2 mag/arcsec2 mu0K Central Ks band surface brightness 36- 39 F4.2 mag/arcsec2 e_mu0K Uncertainty in mu0K 41- 44 F4.2 kpc z0 Extinction-corrected scaleheight 46- 50 F5.3 --- z0/h Extinction-corrected relative thickness of stellar disk 52- 56 F5.2 mag/arcsec2 mu0Kc Extinction-corrected central Ks band surface brightness 58- 61 F4.2 --- Md/Ml Dark-to-luminous mass ratio
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Oct-2011
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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