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Detecting and Characterizing Mg II absorption in DESI Survey Validation Quasar Spectra
Lucas Napolitano, Agnesh Pandey, Adam D. Myers +33
We present findings of the detection of Magnesium II (Mg II, λ = 2796, 2803 Å) absorbers from the early data release of the Dark Energy Spectroscopic Instrument (DESI). DESI is pro…
Extragalactic magnetism with SOFIA (SALSA Legacy Program) -- V: First results on the magnetic field orientation of galaxies
Alejandro S. Borlaff, Enrique Lopez-Rodriguez, Rainer Beck +13
We present the analysis of the magnetic field (-field) structure of galaxies measured with far-infrared (FIR) and radio (3 and 6 cm) polarimetric observations. We use the first…
DESI Survey Validation Spectra Reveal an Increasing Fraction of Recently Quenched Galaxies at
David J. Setton, Biprateep Dey, Gourav Khullar +24
We utilize bright Luminous Red Galaxies (LRGs) from the novel Dark Energy Spectroscopic Instrument Survey Validation spectroscopic sample, leveraging its deep ($\sim2.5…
The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
David M. Alexander, Tamara M. Davis, E. Chaussidon +69
A key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data to quantify key sur…
Extragalactic magnetism with SOFIA (SALSA Legacy Program) -- III: First data release and on-the-fly polarization mapping characterization
Enrique Lopez-Rodriguez, Melanie Clarke, Sachin Shenoy +17
We describe the data processing of the Survey on extragALactic magnetiSm with SOFIA (SALSA Legacy Program). This first data release presents 33% (51.34h out of 155.7h, including ov…
Cosmicflows-4: The Catalog of ~10000 Tully-Fisher Distances
Ehsan Kourkchi, R. Brent Tully, Sarah Eftekharzadeh +14
We present the distances of 9792 spiral galaxies lying within 15,000 km/s using the relation between luminosity and rotation rate of spiral galaxies. The sample is dominantly, but…
Preliminary Target Selection for the DESI Milky Way Survey (MWS)
Carlos Allende Prieto, Andrew P. Cooper, Arjun Dey +31
The DESI Milky Way Survey (MWS) will observe 8 million stars between mag, supplemented by observations of brighter targets under poor observing conditions. The s…
Preliminary Target Selection for the DESI Bright Galaxy Survey (BGS)
Omar Ruiz-Macias, Pauline Zarrouk, Shaun Cole +28
The Dark Energy Spectroscopic Instrument (DESI) will execute a nearly magnitude-limited survey of low redshift galaxies (, median ). Clustering…
The Sloan Digital Sky Survey Reverberation Mapping Project: Photometric g and i Light Curves
K. Kinemuchi, Patrick B. Hall, Ian McGreer +28
The Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) program monitors 849 active galactic nuclei (AGN) both spectroscopically and photometrically. The photometric observati…
Quasars at intermediate redshift are not special; but they are often satellites
Shadab Alam, Nicholas P. Ross, Sarah Eftekharzadeh +4
Understanding the links between the activity of supermassive black holes (SMBH) at the centres of galaxies and their host dark matter haloes is a key question in modern astrophysic…
The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multi-Year Baseline
Yue Shen, C. J. Grier, Keith Horne +32
We investigate the effects of extended multi-year light curves (9-year photometry and 5-year spectroscopy) on the detection of time lags between the continuum variability and broad…
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…
On the small scale clustering of quasars: constraints from the MassiveBlack II simulation
Aklant K. Bhowmick, Tiziana DiMatteo, Sarah Eftekharzadeh +1
We examine recent high-precision measurements of small-scale quasar clustering (at on scales of ) from the SDSS in the context of the MassiveBla…
Velocity-resolved reverberation mapping of five bright Seyfert 1 galaxies
G. De Rosa, M. M. Fausnaugh, C. J. Grier +99
We present the first results from a reverberation-mapping campaign undertaken during the first half of 2012, with additional data on one AGN (NGC 3227) from a 2014 campaign. Our ma…
Continuum Reverberation Mapping of the Accretion Disks in Two Seyfert 1 Galaxies
M. M. Fausnaugh, D. A. Starkey, Keith Horne +69
We present optical continuum lags for two Seyfert 1 galaxies, MCG+08-11-011 and NGC 2617, using monitoring data from a reverberation mapping campaign carried out in 2014. Our light…
The Sloan Digital Sky Survey Reverberation Mapping Project: H and H Reverberation Measurements From First-year Spectroscopy and Photometry
C. J. Grier, J. R. Trump, Yue Shen +39
We present reverberation mapping results from the first year of combined spectroscopic and photometric observations of the Sloan Digital Sky Survey Reverberation Mapping Project. W…
The characteristic halo masses of half-a-million WISE-selected quasars
Michael A. DiPompeo, Ryan C. Hickox, Sarah Eftekharzadeh +1
Recent work has found evidence for a difference in the bias and dark matter halo masses of WISE-selected obscured and unobscured quasars, implying a distinction between these popul…
Clustering on very small scales from a large sample of confirmed quasar pairs: Does quasar clustering track from Mpc to kpc scales?
S. Eftekharzadeh, A. D. Myers, J. F. Hennawi +4
We present the most precise estimate to date of the clustering of quasars on very small scales, based on a sample of 47 binary quasars with magnitudes of and proper trans…
Reverberation Mapping of Optical Emission Lines in Five Active Galaxies
M. M. Fausnaugh, C. J. Grier, M. C. Bentz +68
We present the first results from an optical reverberation mapping campaign executed in 2014, targeting the active galactic nuclei (AGN) MCG+08-11-011, NGC 2617, NGC 4051, 3C 382,…
A Constraint on Quasar Clustering at z=5 from a Binary Quasar
Ian McGreer, Sarah Eftekharzadeh, Adam Myers +1
We report the discovery of a quasar pair at z=5 separated by 21 arcsec. Both objects were identified as quasar candidates using simple color selection techniques applied to photome…