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27 papers · 2 filters
MApping the Most Massive Overdensities Through Hydrogen (MAMMOTH) I: Methodology
Zheng Cai, Xiaohui Fan, Sebastien Peirani +8
Modern cosmology predicts that a galaxy overdensity is associated to a large reservoir of the intergalactic gas, which can be traced by the Ly forest absorption. We have underta…
APOGEE Kinematics I: Overview of the Kinematics of the Galactic Bulge as Mapped by APOGEE
M. Ness, G. Zasowski, J. A. Johnson +12
We present the stellar kinematics across the Galactic bulge and into the disk at positive longitudes from the SDSS-III APOGEE spectroscopic survey of the Milky Way. APOGEE includes…
HST Emission Line Galaxies at z ~ 2: Comparing Physical Properties of Lyman Alpha and Optical Emission Line Selected Galaxies
Alex Hagen, Gregory R. Zeimann, Christoph Behrens +14
We compare the physical and morphological properties of z ~ 2 Lyman-alpha emitting galaxies (LAEs) identified in the HETDEX Pilot Survey and narrow band studies with those of z ~ 2…
Young, Star-forming Galaxies and their local Counterparts: the Evolving Relationship of Mass-SFR-Metallicity since z ~ 2.1
Henry S. Grasshorn Gebhardt, Gregory R. Zeimann, Robin Ciardullo +5
We explore the evolution of the Stellar Mass-Star Formation Rate-Metallicity Relation using a set of 256 COSMOS and GOODS galaxies in the redshift range 1.90 < z < 2.35. We present…
Globular and Open Clusters Observed by SDSS/SEGUE: the Giant Stars
Heather L. Morrison, Zhibo Ma, James L. Clem +10
We present griz observations for the clusters M92, M13 and NGC 6791 and gr photometry for M71, Be 29 and NGC 7789. In addition we present new membership identifications for all the…
The Dust Attenuation Curve versus Stellar Mass for Emission Line Galaxies at z ~ 2
Gregory R. Zeimann, Robin Ciardullo, Caryl Gronwall +8
We derive the mean wavelength dependence of stellar attenuation in a sample of 239 high redshift (1.90 < z < 2.35) galaxies selected via Hubble Space Telescope (HST) WFC3 IR grism…
The Sloan Digital Sky Survey Reverberation Mapping Project: First Broad-line Hbeta and MgII Lags at z>~0.3 from six-Month Spectroscopy
Yue Shen, Keith Horne, C. J. Grier +26
Reverberation mapping (RM) measurements of broad-line region (BLR) lags in z>0.3 quasars are important for directly measuring black hole masses in these distant objects, but so far…
Now You See It, Now You Don't: The Disappearing Central Engine of the Quasar J1011+5442
Jessie C. Runnoe, Sabrina Cales, John J. Ruan +11
We report the discovery of a new "changing-look" quasar, SDSS J101152.98+544206.4, through repeat spectroscopy from the Time Domain Spectroscopic Survey. This is an addition to a s…
Cold gas and a Milky Way-type 2175 Å bump in a metal-rich and highly depleted absorption system
Jingzhe Ma, Paul Caucal, Pasquier Noterdaeme +9
We report the detection of a strong Milky Way-type 2175 Å extinction bump at = 2.1166 in the quasar spectrum towards SDSS J121143.42+083349.7 from the Sloan Digital Sky Surv…
The Stripe 82 Massive Galaxy Project I: Catalog Construction
Kevin Bundy, Alexie Leauthaud, Shun Saito +7
The Stripe 82 Massive Galaxy Catalog (S82-MGC) is the largest-volume stellar mass-limited sample of galaxies beyond z~1 constructed to date. Spanning 139.4 deg2, the S82-MGC includ…
The SDSS-III BOSS quasar lens survey: discovery of thirteen gravitationally lensed quasars
Anupreeta More, Masamune Oguri, Issha Kayo +15
We report the discovery of 13 confirmed two-image quasar lenses from a systematic search for gravitationally lensed quasars in the SDSS-III Baryon Oscillation Spectroscopic Survey…
Detecting Effects of Filaments on Galaxy Properties in the Sloan Digital Sky Survey III
Yen-Chi Chen, Shirley Ho, Rachel Mandelbaum +6
We study the effects of filaments on galaxy properties in the Sloan Digital Sky Survey (SDSS) Data Release 12 using filaments from the `Cosmic Web Reconstruction' catalogue (Chen e…
Near-ultraviolet Spectroscopy of Star-forming Galaxies from eBOSS: Signatures of Ubiquitous Galactic-scale Outflows
Guangtun Ben Zhu, Johan Comparat, Jean-Paul Kneib +7
We present the rest-frame near-ultraviolet (NUV) spectroscopy of star-forming galaxies (SFGs) at 0.6<z<1.2 from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) in SDSS…
Oscillating red giants observed during Campaign 1 of the Kepler K2 mission: New prospects for galactic archaeology
D. Stello, D. Huber, S. Sharma +21
NASA's re-purposed Kepler mission -- dubbed K2 -- has brought new scientific opportunities that were not anticipated for the original Kepler mission. One science goal that makes op…
The Stripe 82 Massive Galaxy Project II: Stellar Mass Completeness of Spectroscopic Galaxy Samples from the Baryon Oscillation Spectroscopic Survey
Alexie Leauthaud, Kevin Bundy, Shun Saito +7
The Baryon Oscillation Spectroscopic Survey (BOSS) has collected spectra for over one million galaxies at over a volume of 15.3 Gpc (9,376 deg) -- providing us…
Probing Galactic Structure with the Spatial Correlation Function of SEGUE G-dwarf Stars
Qingqing Mao, Andreas A. Berlind, Kelly Holley-Bockelmann +8
We measure the two-point correlation function of G-dwarf stars within 1-3 kpc of the Sun in multiple lines-of-sight using the Schlesinger et al. G-dwarf sample from the SDSS SEGUE…
The Sloan Digital Sky Survey Reverberation Mapping Project: Ensemble Spectroscopic Variability of Quasar Broad Emission Lines
Mouyuan Sun, Jonathan R. Trump, Yue Shen +14
We explore the variability of quasars in the MgII and Hbeta broad emission lines and UV/optical continuum emission using the Sloan Digital Sky Survey Reverberation Mapping project…
The Sloan Digital Sky Survey Reverberation Mapping Project: Post-Starburst Signatures in Quasar Host Galaxies at z < 1
Yoshiki Matsuoka, Michael A. Strauss, Yue Shen +6
Quasar host galaxies are key for understanding the relation between galaxies and the supermassive black holes (SMBHs) at their centers. We present a study of 191 broad-line quasars…
Characteristics of He II Proximity Profiles
W. Zheng, D. Syphers, A. Meiksin +4
The proximity profile in the spectra of z~3 quasars, where fluxes extend blueward of the He II Lya wavelength 304 (1+z) A, is one of the most important spectral features in the stu…
The Sloan Digital Sky Survey Reverberation Mapping Project: Rapid CIV Broad Absorption Line Variability
C. J. Grier, P. B. Hall, W. N. Brandt +22
We report the discovery of rapid variations of a high-velocity CIV broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014…
The Sloan Digital Sky Survey Reverberation Mapping Project: No Evidence for Evolution in the M-sigma Relation to z~1
Yue Shen, Jenny E. Greene, Luis C. Ho +16
We present host stellar velocity dispersion measurements for a sample of 88 broad-line quasars at 0.1<z<1 (46 at z>0.6) from the Sloan Digital Sky Survey Reverberation Mapping (SDS…
Detection of Rest-frame Optical Lines from X-shooter Spectroscopy of Weak Emission Line Quasars
Richard M. Plotkin, Ohad Shemmer, Benny Trakhtenbrot +10
Over the past 15 years, examples of exotic radio-quiet quasars with intrinsically weak or absent broad emission line regions (BELRs) have emerged from large-scale spectroscopic sky…
Chemical Cartography with APOGEE: Metallicity Distribution Functions and the Chemical Structure of the Milky Way Disk
Michael R. Hayden, Jo Bovy, Jon A. Holtzman +32
Using a sample of 69,919 red giants from the SDSS-III/APOGEE Data Release 12, we measure the distribution of stars in the [/Fe] vs. [Fe/H] plane and the metallicity distribution…
X-ray Insights into the Nature of PHL 1811 Analogs and Weak Emission-Line Quasars: Unification with a Geometrically Thick Accretion Disk?
B. Luo, W. N. Brandt, P. B. Hall +9
We present an X-ray and multiwavelength study of 33 weak emission-line quasars (WLQs) and 18 quasars that are analogs of the extreme WLQ, PHL 1811, at z ~ 0.5-2.9. New Chandra 1.5-…