NOAO >   Observing Info >   Approved Programs >   2015A-0112

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Program Information for 2015A-0112


PI: Karen M Leighly, U. of Oklahoma, leighly@nhn.ou.edu
Address: Physics Department, 440 W. Brooks St., Norman, OK 73019 USA

CoI: Donald Terndrup, Ohio State U.
CoI: Sarah Gallagher, University of Western Ontario

Title: Probing the Physics of Quasar Outflows using Mini-LoBALs

Abstract: Outflows in quasars, manifest in absorption lines in the rest-UV spectrum, may be important contributors to the co-evolution of galaxies and quasars. However, the physical properties of the outflows are poorly understood. X-ray absorption has been shown to offer a diagnostic of the viewing angle to the nucleus; for example, quasars with low-ionization features in their spectra (LoBALQs) are often relatively X-ray weak, suggesting a more equatorial view through the thickest part of the wind, while those with narrow ($\Delta v < 2000\ {\rm km}\ {\rm s}^{-1}$) absorption lines, called mini-BALQs, are brighter in X-rays, suggesting a lower inclination. X-ray studies are hampered by ambiguity due to ubiquitous variability in absorption lines. We have been awarded {\it Chandra} observations of ten objects classified as mini-LoBALQs (i.e., with narrow absorption features in low- ionization lines) based on their SDSS spectra. We request time to obtain KPNO 4-meter spectra contemporaneous with (i.e., in the same semester as) the {\it Chandra} observations. These spectra will be used to investigate, for the first time, the absorption-line variability of this class of absorption-line quasars and to determine the outflow properties near the time of the {\it Chandra} observations.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2015A):  KP-4m/KOSMOS -- 3n on Apr 21 - Apr 23 2015


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2015A-0112

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