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J/ApJ/665/990       SDSS DR2 BAL QSOs                        (Ganguly+, 2007)

Outflows and the physical properties of quasars. Ganguly R., Brotherton M.S., Cales S., Scoggins B., Shang Z., Vestergaard M. <Astrophys. J., 665, 990-1003 (2007)> =2007ApJ...665..990G
ADC_Keywords: QSOs ; Redshifts ; Spectroscopy Keywords: quasars: absorption lines - quasars: general Abstract: We have investigated a sample of 5088 quasars from the SDSS DR2 in order to determine how the frequency and properties of BALs depend on black hole mass, bolometric luminosity, Eddington fraction (L/LEdd), and spectral slope. We focus only on high-ionization BALs and find a number of significant results. While quasars accreting near the Eddington limit are more likely to show BALs than lower L/LEdd systems, BALs are present in quasars accreting at only a few percent Eddington. We find a stronger effect with bolometric luminosity, such that the most luminous quasars are more likely to show BALs. There is an additional effect, previously known, that BAL quasars are redder on average than unabsorbed quasars. The strongest effects involving the quasar physical properties and BAL properties are related to terminal outflow velocity. Maximum observed outflow velocities increase with both the bolometric luminosity and the blueness of the spectral slope, suggesting that the ultraviolet luminosity to a great extent determines the acceleration. These results support the idea of outflow acceleration via ultraviolet line scattering. Description: Our sample comes from the SDSS Data Release 2. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 97 4858 Measured and derived quasar parameters
See also: http://www.sdss.org : SDSS Home Page Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [SDSS] 6- 25 A20 --- SDSS Object SDSS name (JHHMMSS.ss+DDMMSS.ss) 27- 31 I5 d MJD Modified Julian Day of observation 33- 36 I4 --- Plate Plate number of observation 38- 40 I3 --- Fiber Fiber number of observation 42- 49 F8.6 --- z Quasar Redshift 51- 57 F7.4 10-19W/m2/nm F3000 Flux density at 3000 Angstroms (1) 59- 63 F5.3 --- alpha Power-law index at 3000 Angstroms (2) 65- 71 F7.3 10+38W L3000 Luminosity at 3000 Angstroms 73- 77 I5 km/s FWMH The Mg II emission-line FWHM 79- 84 F6.3 10+8solMass Mass Black hole mass estimate 86- 91 F6.4 --- ERatio Eddington ratio 93 I1 --- Fit [1/5] Fitting run that provided the best fit (3) 95- 97 A3 --- Qcl Quasar classification (4)
Note (1): In units of 10-17erg/s/cm2/Angstrom. Note (2): Where F~λ. Note (3): See table3 in the paper. Note (4): Quasar classification as follows: Reg = Unabsorbed quasar (see text) BAL = broad absorptions line quasar AAL = "associated" absorption line quasar
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 06-Sep-2009
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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