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10 papers · 2 filters
The correlations between optical/UV broad lines and X-ray emission for a large sample of quasars
J. D. Timlin, W. N. Brandt, Q. Ni +5
We present Chandra observations of 2106 radio-quiet quasars in the redshift range 1.7<z<2.7 from the Sloan Digital Sky Survey (SDSS), through data release fourteen (DR14), that do…
The Mass-Metallicity Relation at : Redshift Evolution and Parameter Dependency
Chi Huang, Hu Zou, Xu Kong +11
The spectra of emission-line galaxies (ELGs) from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digit Sky Survey (SDSS) are used to study the mass-metal…
The Sloan Digital Sky Survey Reverberation Mapping Project: Comparison of Lag Measurement Methods with Simulated Observations
Jennifer I-Hsiu Li, Yue Shen, W. N. Brandt +8
We investigate the performance of different methodologies that measure the time lag between broad-line and continuum variations in reverberation mapping data using simulated light…
The Sloan Digital Sky Survey Reverberation Mapping Project: Accretion and Broad Emission Line Physics from a Hypervariable Quasar
Jason Dexter, Shuo Xin, Yue Shen +18
We analyze extensive spectroscopic and photometric data of the hypervariable quasar SDSS J131424+530527 (RMID 017) at z=0.456, an optical "changing look" quasar from the Sloan Digi…
The Sloan Digital Sky Survey Reverberation Mapping Project: Initial CIV Lag Results from Four Years of Data
C. J. Grier, Yue Shen, Keith Horne +31
We present reverberation-mapping lags and black-hole mass measurements using the CIV 1549 broad emission line from a sample of 349 quasars monitored as a part of the Sloan Digital…
Variability of Low-ionization Broad Absorption Line Quasars Based on Multi-epoch Spectra from The Sloan Digital Sky Survey
Weimin. Yi, W. N. Brandt, P. B. Hall +5
We present absorption variability results for 134 bona fide \mgii\ broad absorption line (BAL) quasars at 0.46~~2.3 covering days to 10 yr in the rest f…
A Cautionary Tale of Attenuation in Star Forming Regions
M. Molina, N. Ajgaonkar, R. Yan +5
The attenuation of light in star forming galaxies is correlated with a multitude of physical parameters including star formation rate, metallicity and total dust content. This vari…
Galaxies of the Universe. I. Grism-Selected Rest-Frame Optical Emission Line Galaxies
William P. Bowman, Gregory R. Zeimann, Robin Ciardullo +6
Euclid, WFIRST, and HETDEX will make emission-line selected galaxies the largest observed constituent in the universe. However, we only have a limited understanding of the…
The Sloan Digital Sky Survey Reverberation Mapping Project: Low-Ionization Broad-Line Widths and Implications for Virial Black Hole Mass Estimation
Shu Wang, Yue Shen, Linhua Jiang +8
The width of the broad emission lines in quasars is commonly characterized either by the full-width-at-half-maximum (FWHM) or the square root of the second moment of the line profi…
Interpreting the star formation - extinction relation with MaNGA
Huan Li, Stijn Wuyts, Lei Hao +5
We investigate the resolved relation between local extinction and star formation surface density within nearby star-forming galaxies selected from the MaNGA survey. Balmer decremen…