J/ApJ/709/611 The multi-component absorber QSO 0318-0600 (Dunn+, 2010)
The quasar outflow contribution to AGN feedback: VLT measurements of
SDSS J0318-0600.
Dunn J.P., Bautista M., Arav N., Moe M., Korista K., Costantini E.,
Benn C., Ellison S., Edmonds D.
<Astrophys. J., 709, 611-631 (2010)>
=2010ApJ...709..611D 2010ApJ...709..611D
ADC_Keywords: QSOs ; Spectroscopy ; Line Profiles
Keywords: quasars: absorption lines - quasars: individual (SDSS J0318-0600)
Abstract:
We present high spectral resolution Very Large Telescope observations
of the broad absorption line quasar SDSS J0318-0600. This high-quality
data set allows us to extract accurate ionic column densities and
determine an electron number density of ne=103.3±0.2cm-3 for
the main outflow absorption component. The heavily reddened spectrum
of SDSS J0318-0600 requires purely silicate dust with a reddening
curve characteristic of predominately large grains, from which we
estimate the bolometric luminosity. We carry out photoionization
modeling to determine the total column density, ionization parameter,
and distance of the gas and find that the photoionization models
suggest abundances greater than solar. Due to the uncertainty in the
location of the dust extinction, we arrive at two viable distances for
the main ouflow component from the central source, 6 and 17kpc, where
we consider the 6kpc location as somewhat more physically plausible.
Assuming the canonical global covering of 20% for the outflow and a
distance of 6kpc, our analysis yields a mass flux of 120M☉/yr
and a kinetic luminosity that is ∼0.1% of the bolometric luminosity of
the object. Should the dust be part of the outflow, then these values
are ∼4x larger. The large mass flux and kinetic luminosity make this
outflow a significant contributor to active galactic nucleus feedback
processes.
Description:
During 2006 October (September 30 to October 22), we obtained eight
echelle spectra, each with an exposure time of 2850s, of the object
SDSS J0318-0600 (z=1.967, Schneider et al. 2007, Cat. VII/260,
RA=031856.7, DE=-060037.4) with the VLT. The spectra were taken using
the UV-Visual Echelle Spectrograph (UVES) with a slit width of 1.0"
which gives a resolving power of ∼40000, and a central wavelength
position of 5800 and 3460Å for the red and blue detectors
respectively.
Objects:
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RA (2000) DE Designation(s)
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03 18 56.63 -06 00 37.7 QSO 0318-0600 = SDSS J031856.62-060037.7
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 43 91 Detected absorption lines in QSO 0318-0600
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See also:
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
J/MNRAS/410/860 : Redshift dependence of BAL QSOs (Allen+, 2011)
J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)
J/A+A/508/1527 : SiII Radiative transition rates (Bautista+, 2009)
J/MNRAS/382/412 : Catalog of SDSS-DR5/2MASS spectroscopic quasars (Ofek, 2007)
J/PASP/118/1077 : Metal-strong damped Lyα systems (Herbert-Fort+, 2006)
http://www.nist.gov/pml/data/asd.cfm : NIST Atomic Spectra Database
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ion Ion identification
8- 14 F7.2 0.1nm lambda Wavelength in Angstroms
16- 21 F6.3 [-] log(gf) Log of the oscillator strength
23- 27 I5 cm-1 Elow Energy of lower level
29- 30 I2 --- glow Lower level
32- 40 A9 --- Comp Kinematic components measured (labeled a-k
from high to low velocity)
42- 43 I2 --- Ref Reference (1)
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Note (1): Reference as follows:
1 = Bautista et al. (2009MNRAS.393.1503B 2009MNRAS.393.1503B);
2 = Bautista et al. (2009, to be submitted);
3 = Kurucz & Bell (1995all..book.....K 1995all..book.....K);
4 = K. Butler, C. Mendoza, and C. J. Zeippen, J. Phys. B 26, 4409 (1993);
5 = C. E. Moore, NSRDS-NBS 3, Sect. 3 (1970ipil.book.....M 1970ipil.book.....M);
6 = Fedchak & Lawler (1999ApJ...523..734F 1999ApJ...523..734F);
7 = Fedchak, Wiese, Lawler (2000ApJ...538..773F 2000ApJ...538..773F );
8 = J. R. Fuhr and W. L. Wiese, Atomic Transition Probabilities,
published in the CRC Handbook of Chemistry and Physics, 79th Edition,
edited by D. R. Lide (CRC Press, Inc., Boca Raton, FL, 1998);
9 = Fuhr & Wiese (2006, J. Chem. Ref. Data, Vol. 35, No.4))
10 = NIST Atomic Spectra Database (2009 -
http://www.nist.gov/pml/data/asd.cfm);
11 = Salih, Lawler, Whaling 1985, Phys Rev A 31, 744;
12 = Toner & Hibbert (2005MNRAS.361..673T 2005MNRAS.361..673T).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 05-Mar-2012