Search Publications
SILVERRUSH. VIII. Spectroscopic Identifications of Early Large-scale Structures with Protoclusters over 200 Mpc at z ∼ 6-7: Strong Associations of Dusty Star-forming Galaxies
Ono, Yoshiaki; Ouchi, Masami; Goto, Tomotsugu +32 more
We have obtained three-dimensional maps of the universe in ∼200 × 200 × 80 comoving Mpc3 (cMpc3) volumes each at z = 5.7 and 6.6 based on a spectroscopic sample of 179 galaxies that achieves ≳80% completeness down to the Lyα luminosity of {log}({L}Lyα }/[{erg} {{{s}}}-1])=43.0, based on our Keck and Gemi…
Resolved Young Binary Systems and Their Disks
Jensen, Eric L. N.; Carpenter, John; Ricci, Luca +4 more
We have conducted a survey of young single and multiple systems in the Taurus-Auriga star-forming region with the Atacama Large Millimeter Array (ALMA), substantially improving both the spatial resolution and sensitivity with which individual protoplanetary disks in these systems have been observed. These ALMA observations can resolve binary separ…
A New Class of Changing-look LINERs
Cenko, S. Bradley; Duev, Dmitry A.; Rusholme, Ben +28 more
We report the discovery of six active galactic nuclei (AGNs) caught “turning on” during the first nine months of the Zwicky Transient Facility (ZTF) survey. The host galaxies were classified as low-ionization nuclear emission-line region galaxies (LINERs) by weak narrow forbidden line emission in their archival SDSS spectra, and detected by ZTF as…
The Broad Absorption Line Tidal Disruption Event iPTF15af: Optical and Ultraviolet Evolution
Cenko, S. B.; Veilleux, S.; Bloom, J. S. +16 more
We present multiwavelength observations of the tidal disruption event (TDE) iPTF15af, discovered by the intermediate Palomar Transient Factory survey at redshift z = 0.07897. The optical and ultraviolet (UV) light curves of the transient show a slow decay over 5 months, in agreement with previous optically discovered TDEs. It also has a comparable…
Black Hole Mass Scaling Relations for Spiral Galaxies. I. M BH-M *,sph
Graham, Alister W.; Davis, Benjamin L.; Cameron, Ewan
The (supermassive black hole mass, M BH)-(bulge stellar mass, {M}* ,{sph}) relation is, obviously, derived using two quantities. We endeavor to provide accurate values for the latter via detailed multicomponent galaxy decompositions for the current full sample of 43 spiral galaxies having directly measured M BH val…
The First Tidal Disruption Flare in ZTF: From Photometric Selection to Multi-wavelength Characterization
Cenko, S. Bradley; Riddle, Reed; Rusholme, Ben +37 more
We present Zwicky Transient Facility (ZTF) observations of the tidal disruption flare AT2018zr/PS18kh reported by Holoien et al. and detected during ZTF commissioning. The ZTF light curve of the tidal disruption event (TDE) samples the rise-to-peak exceptionally well, with 50 days of g- and r-band detections before the time of maximum light. We al…
A Spectroscopic Analysis of the California-Kepler Survey Sample. I. Stellar Parameters, Planetary Radii, and a Slope in the Radius Gap
Cunha, Katia; Smith, Verne V.; Martinez, Cintia F. +1 more
We present results from a quantitative spectroscopic analysis conducted on archival Keck/HIRES high-resolution spectra from the California-Kepler Survey (CKS) sample of transiting planetary host stars identified from the Kepler mission. The spectroscopic analysis was based on a carefully selected set of Fe I and Fe II lines, resulting in precise v…
The Degree of Alignment between Circumbinary Disks and Their Binary Hosts
Torres, Guillermo; Wilner, David J.; Macintosh, Bruce +5 more
All four circumbinary (CB) protoplanetary disks orbiting short-period (P < 20 days) double-lined spectroscopic binaries (SB2s)—a group that includes UZ Tau E, for which we present new Atacama Large Millimeter/Submillimeter Array data—exhibit sky-plane inclinations i disk that match, to within a few degrees, the sky-plane inclinations…
The Unusual Initial Mass Function of the Arches Cluster
Hosek, Matthew W., Jr.; Lu, Jessica R.; Clarkson, William I. +5 more
As a young massive cluster in the central molecular zone, the Arches cluster is a valuable probe of the stellar initial mass function (IMF) in the extreme Galactic center environment. We use multi-epoch Hubble Space Telescope observations to obtain high-precision proper-motion and photometric measurements of the cluster, calculating cluster member…
Discovery and Early Evolution of ASASSN-19bt, the First TDE Detected by TESS
Morrell, Nidia; Strader, Jay; Newman, Andrew B. +23 more
We present the discovery and early evolution of ASASSN-19bt, a tidal disruption event (TDE) discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d ≃ 115 Mpc and the first TDE to be detected by TESS. As the TDE is located in the TESS Continuous Viewing Zone, our data set includes 30 minute cadence observations starti…