Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars

Details Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars

2006-10-13

arxiv.org/abs/astro-ph/0610435v1

Astron.J.133:479-488,2007

Astronomy and Astrophysics

Astrophysics

Uses aastex.cls, 21 pages in preprint mode, including 6 figures and 2 tables; accepted for publication in The Astronomical Jou

Scientific paper

10.1086/510129

We present low-resolution ultraviolet spectra of 14 low redshift (z<0.8) quasars observed with HST/STIS as part of a Snap project to understand the relationship between quasar outflows and luminosity. By design, all observations cover the CIV emission line. Nine of the quasars are from the Hamburg-ESO catalog, three are from the Palomar-Green catalog, and one is from the Parkes catalog. The sample contains a few interesting quasars including two broad absorption line (BAL) quasars (HE0143-3535, HE0436-2614), one quasar with a mini-BAL (HE1105-0746), and one quasar with associated narrow absorption (HE0409-5004). These BAL quasars are among the brightest known (though not the most luminous) since they lie at z<0.8. We compare the properties of these BAL quasars to the z<0.5 Palomar-Green and z>1.4 Large Bright Quasar samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ~ L^0.62 relation derived by Laor & Brandt (2002). Another quasar, HE0441-2826, contains extremely weak emission lines and our spectrum is consistent with a simple power-law continuum. The quasar is radio-loud, but has a steep spectral index and a lobe-dominated morphology, which argues against it being a blazar. The unusual spectrum of this quasar resembles the spectra of the quasars PG1407+265, SDSSJ1136+0242, and PKS1004+13 for which several possible explanations have been entertained.

Affiliated with

Also associated with

No associations

Rating

Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift 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 Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-89658