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J/ApJ/510/637      Near IR properties of Galaxy disks        (Hunt+ 1999)

The Disks of Galaxies with Seyfert and Starburst Nuclei. II. Near-Infrared Structural Properties Hunt L. K., Malkan M. A., Moriondo G., Salvati M. <Astrophys. J. 510, 637 (1999)> =1999ApJ...510..637H
ADC_Keywords: Galaxies, IR; Galaxies, Seyfert; Infrared sources; Photometry, infrared; Photometry, surface Keywords: galaxies: active - galaxies: Seyfert - galaxies: starburst - infrared: galaxies Abstract: We have derived the near-infrared structural components of a sample of Seyfert and starburst (SBN) host galaxies by fitting near-infrared images with a new two-dimensional decomposition algorithm. An analysis of the fitted parameters shows that Seyfert 1 and SBN bulges resemble normal early-type bulges in structure and color, with (J-K)cb about 0.1 mag redder than disk (J-K)cd. Seyfert 2 bulges, on the other hand, are bluer than normal, with (J-K)cb~(J-K)cd. Seyfert disks (especially type 1), but not those of SBNs, are abnormally bright (in surface brightness), significantly more so than even the brightest normal disks. Seyfert disks are also compact, but similar to those in normal early-type spirals. For a given mass, Seyfert and particularly SBN galaxies are abnormally rich in neutral hydrogen, and there is strong, albeit indirect, evidence for lower mass-to-light (M/L) ratios in Seyfert and SBN disks, but normal M/L ratios in their bulges. In Seyfert and SBN galaxies, H I mass fractions and M/L ratios are anticorrelated, and we attribute the high gas mass fractions and low M/L ratios in SBNs and several Seyfert galaxies to ongoing star formation. Such abundant gas in Seyfert galaxies would be expected to inhibit bar formation, which may explain why active galaxies are not always barred. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 161 24 Near IR structural parameters
See also: VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991) J/AJ/108/2128 : RC3 corrections and additions (Corwin+ 1994) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Galaxy name 11- 15 F5.1 Mpc Dist Distance (1) 17 I1 --- NBest Best fitting bulge exponent 18 A1 --- u_NBest [:] colon signifies ill-determined 21- 25 F5.3 --- epsil ? Ellipticity of the bulge 28- 31 F4.2 --- e_epsil ? Uncertainty in epsil of the bulge 33- 37 F5.2 arcsec angBsiz ? Angular scale length of the bulge 40- 43 F4.2 arcsec e_angBsiz ? Uncertainty in angBsiz of the bulge 46- 49 F4.2 kpc phyBsiz ? Physical scale length of the bulge 52- 56 F5.2 mag/arcsec2 KmagB ? Surface brightness in K band of the bulge (2) 59- 62 F4.2 mag/arcsec2 e_KmagB ? Uncertainty in SB of the bulge 65- 68 F4.2 mag J-K ? J-K color of the bulge 71- 75 F5.2 mag H-K ? H-K color of the bulge 78- 83 F6.2 mag KMagB ? Absolute K band magnitude of the bulge 86- 89 F4.1 deg incl ? Inclination of the disk 92- 95 F4.1 deg e_incl ? Uncertainty in incl 98-102 F5.2 arcsec angDsiz ? Angular scale length of the disk 105-108 F4.2 arcsec e_angDsiz ? Uncertainty in SLD 110-113 F4.2 kpc phyDsiz ? Physical scale length of the disk 116-120 F5.2 mag/arcsec2 SBD ? Surface brightness in K band of the disk (2) 123-126 F4.2 mag/arcsec2 e_SBD ? Uncertainty in SBD of the disk 129-132 F4.2 mag (J-K)D ? J-K color of the disk 135-138 F4.2 mag (H-K)D ? H-K color of the disk 141-146 F6.2 mag KMagD ? Absolute K band magnitude of the disk 149-154 F6.2 mag KMagG Absolute K band magnitude of the galaxy 158-161 F4.1 --- chi2 χ2 of the NBest
Note (1): Distances are calculated according to the precepts of the RC3 Ho=75 km.s-1.Mpc-1 Note (2): Surface brightness has been corrected for Galactic extinction and redshift as in Hunt+ 1997 (1997ApJS..108..229H), and transformed to face-on values assuming optical transparency (see Moriondo+ 1998a 1998A&AS..130...81M)
History: From the ApJ electronic edition. References: Hunt+ 1997 (1997ApJS..108..229H) Paper I
(End) Greg Schwarz (AAS) 09-Feb-2000
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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