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What Determines the Incidence and Extent of MgII Absorbing Gas Around Galaxies?
Hsiao-Wen Chen, Vivienne Wild, Jeremy L. Tinker +4
We study the connections between on-going star formation, galaxy mass, and extended halo gas, in order to distinguish between starburst-driven outflows and infalling clouds that pr…
Peering through the OH Forest: public release of sky-residual subtracted spectra for SDSS DR7
Vivienne Wild, Paul C. Hewett
The Sloan Digital Sky Survey (SDSS) automated spectroscopic reduction pipeline provides >1.5 million intermediate resolution, R~2000, moderate signal-to-noise ratio (SNR), SNR~15,…
Optical vs. infrared studies of dusty galaxies and AGN: (I) Nebular emission lines
Vivienne Wild, Brent Groves, Timothy Heckman +6
Optical nebular emission lines are commonly used to estimate the star formation rate of galaxies and the black hole accretion rate of their central active nucleus. The accuracy of…
Indicators of Intrinsic AGN Luminosity: a Multi-Wavelength Approach
Stephanie M. LaMassa, Timothy M. Heckman, Andrew Ptak +4
We consider five indicators for intrinsic AGN luminosity: the luminosities of the [OIII]5007 line, the [OIV]25.89m line, the mid-infrared (MIR) continuum emission by the toru…
The GALEX Arecibo SDSS Survey II: The Star Formation Efficiency of Massive Galaxies
David Schiminovich, Barbara Catinella, Guinevere Kauffmann +23
We use measurements of the HI content, stellar mass and star formation rates in ~190 massive galaxies with stellar masses greater than 10^10 Msun, obtained from the Galex Arecibo S…
Improved redshifts for SDSS quasar spectra
Paul C. Hewett, Vivienne Wild
A systematic investigation of the relationship between different redshift estimation schemes for more than 91000 quasars in the Sloan Digital Sky Survey (SDSS) Data Release 6 (DR6)…