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J/ApJ/585/647       Velocity dispersion in AGN               (Boroson, 2003)

Does the narrow [O III] λ5007 line reflect the velocity dispersion in active galactic nuclei? Boroson T.A. <Astrophys. J. 585, 647 (2003)> =2003ApJ...585..647B
ADC_Keywords: QSOs ; Active gal. nuclei ; Redshifts ; Radio lines ; Velocity dispersion Keywords: black hole physics - galaxies: active - galaxies: bulges - galaxies: nuclei - quasars: emission lines Abstract: It has been proposed that the width of the narrow [O III] λ5007 emission line can be used as a surrogate for the stellar velocity dispersion in active galaxies. This proposition is tested using the Sloan Digital Sky Survey (SDSS) Early Data Release (EDR) spectra of 107 low-redshift radio-quiet QSOs and Seyfert 1 galaxies by investigating the correlation between black hole mass, as determined from Hβ FWHM and optical luminosity, and [O III] FWHM. The correlation is real, but the scatter is large. Without additional information or selection criteria, the [O III] width can predict the black hole mass to a factor of 5. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 62 115 Line widths and black hole masses of SDSS sample
See also: J/AJ/123/567 : SDSS quasar catalog. EDR. (Schneider+, 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [SDSS] 6- 24 A19 --- SDSS SDSS name (based oin J2000 position) 26- 31 F6.4 --- z Redshift 33- 37 I5 km/s FWHM The Full-Width at Half-Maximum of Hβ 39- 41 I3 km/s sigma The [O III] velocity dispersion 43- 46 F4.2 [solMass] logM Log of the black hole mass (1) 48- 52 F5.2 [---] logR ? Log of the ratio of flux density at 5GHz to flux density at 2500 Angstrom 54- 55 A2 --- f_logR Flag on logR (2)
Note (1): Derived using the formula M=v2*RBLR/G, where v=30.5/2*FWHM, and RBLR=32.9(λ*L5100/1044ergs/s)0.7 light days (Kaspi et al., 2000ApJ...533..631K). The values of L5100 were derived from the r* photometry in the SDSS database. Fluxes were converted to luminosities using the Schlegel et al. (1998ApJ...500..525S) maps for correcting for galactic absorption, H0=75km/s/Mpc, and q0=0.5. Note (2): Flags: : = indicates a differences between the radio and optical centroid of more than 2 arcseconds nd = Not detected no = Not observed
History: From electronic version of the journal References: Stoughton et al., 2002AJ....123..485S, SDSS: early data release.
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 29-Apr-2003
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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