XMM-NEWTON OBSERVATIONS OF THE RADIO-LOUD BROAD ABSORPTION LINE QUASAR FBQS J131213.5+231958

Journal Article · Wed Dec 15 04:00:00 EST 2010 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/140/6/1960· OSTI ID:21443148

Mathur, Smita ^[1]

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1. Astronomy Department, Ohio State University, Enarson Hall, 140 W. 18th Avenue, Columbus, OH 43210 (United States)

We present XMM-Newton observations of the broad absorption line (BAL) quasar FBQS J131213.5+231958. The X-ray spectrum of the source can be well described by an absorbed power-law model in which the absorber is either ionized or only partially covers the continuum source. This can explain the apparent lack of absorption observed in the Chandra spectrum with low signal-to-noise ratio. While the power-law slope of the spectrum is similar to that of non-BAL radio-loud quasars, the Eddington luminosity ratio is likely to be significantly higher than the mean. This shows that in high-mass black holes (BHs), high Eddington accretion may not result in as steep of a spectrum as in lower-mass BHs. This provides important constraints for accretion disk models. It also provides support to the idea that BAL quasars, at least their radio-loud subclass, represent an early evolutionary stage of quasars.

• OSTI ID: 21443148
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 6 Vol. 140; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION
ACCRETION DISKS
BLACK HOLES
COSMIC RADIO SOURCES
DIMENSIONLESS NUMBERS
GALAXIES
GALAXY NUCLEI
LUMINOSITY
MASS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUASARS
SIGNAL-TO-NOISE RATIO
SORPTION
SPECTRA
X-RAY SPECTRA