A New Orientation Indicator for Radio-Quiet Quasars

Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

8 pages, 2 figures, 1 table, accepted for publication in ApJ Letters

Scientific paper

The velocities of the [O III] 5007 and optical Fe II emission lines, measured relative to the systemic redshifts of 2265 QSOs by Hu et al. (2008), show the signature of a disklike BLR structure with polar outflows. Objects with large [O III] outflows show no Fe II offset velocity and are seen pole-on. Objects with large Fe II inflow show no [O III] offset velocity and are seen edge-on. This interpretation is supported by the morphology of the radio-loud objects within the sample and by previous determinations of the geometry of the broad and narrow line regions. Analysis of the objects with neither Fe II or [O III] velocity offsets, however, show that the two groups also differ in Eddington ratio, and, within this subset, corresponding groups with high and low Eddington ratio but with the opposite orientation can be identified. Using these four subsets of the sample, the effects of orientation and Eddington ratio can be separated, and, in some cases, quantified. The changes in apparent continuum luminosity and broad H-beta width and strength suggest a model in which both continuum and H-beta are emitted from the surface of the disk, which is less flattened in high Eddington ratio objects. The effects of orientation on the derived properties, black hole mass and Eddington ratio, are significant, though not large. The [O III] outflow appears to influence the width of that line, as well as its centroid.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

A New Orientation Indicator for Radio-Quiet Quasars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A New Orientation Indicator for Radio-Quiet Quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A New Orientation Indicator for Radio-Quiet Quasars will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-216898

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.