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A Flexible Method of Estimating Luminosity Functions
Brandon C. Kelly, Xiaohui Fan, Marianne Vestergaard
We describe a Bayesian approach to estimating luminosity functions. We derive the likelihood function and posterior probability distribution for the luminosity function, given the…
Observational Constraints on the Dependence of Radio-Quiet Quasar X-ray Emission on Black Hole Mass and Accretion Rate
Brandon C. Kelly, Jill Bechtold, Jonathan R. Trump +2
In this work we use a sample of 318 radio-quiet quasars (RQQ) to investigate the dependence of the ratio of optical/UV flux to X-ray flux, alpha_ox, and the X-ray photon index, Gam…
The Role of Galactic Winds on Molecular Gas Emission from Galaxy Mergers
Desika Narayanan, T. J. Cox, Brandon Kelly +7
We assess the impact of starburst and AGN feedback-driven winds on the CO emission from galaxy mergers, and, in particular, search for signatures of these winds in the simulated CO…
Gemini Near-infrared Spectroscopy of Luminous z~6 Quasars: Chemical Abundances, Black Hole Masses, and MgII Absorption
Linhua Jiang, Xiaohui Fan, Marianne Vestergaard +4
We present Gemini near-infrared spectroscopic observations of six luminous quasars at z=5.86.3. Five of them were observed using Gemini-South/GNIRS, which provides a simultan…
Some Aspects of Measurement Error in Linear Regression of Astronomical Data
Brandon C. Kelly
I describe a Bayesian method to account for measurement errors in linear regression of astronomical data. The method allows for heteroscedastic and possibly correlated measurement…
Spitzer observations of a 24 micron shadow: Bok Globule CB190
Amelia M. Stutz, John H. Bieging, George H. Rieke +8
We present Spitzer observations of the dark globule CB190 (L771). We observe a roughly circular 24 micron shadow with a 70 arcsec radius. The extinction profile of this shadow matc…