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RELICS: Strong Lensing Analysis of MACS J0417.5-1154 and Predictions for Observing the Magnified High-redshift Universe with JWST
Ouchi, Masami; Mahler, Guillaume; Frye, Brenda L. +37 more
Strong gravitational lensing by clusters of galaxies probes the mass distribution at the core of each cluster and magnifies the universe behind it. MACS J0417.5-1154 at z = 0.443 is one of the most massive clusters known based on weak lensing, X-ray, and Sunyaev-Zel’dovich analyses. Here we compute a strong lens model of MACS J0417 based on Hubble…
Analysis of the physical nature of 22 New VVV Survey Globular Cluster candidates in the Milky Way bulge
Minniti, Dante; Hempel, Maren; Fernández-Trincado, José G. +11 more
In order to characterize 22 new globular cluster (GC) candidates in the Galactic bulge, we present their colour-magnitude diagrams (CMDs) and Ks-band luminosity functions (LFs) using the near-infrared VVV database as well as Gaia-DR2 proper motion data set. CMDs were obtained, on one hand, after properly decontaminating the observed dia…
The Extremely Luminous Quasar Survey in the Sloan Digital Sky Survey Footprint. III. The South Galactic Cap Sample and the Quasar Luminosity Function at Cosmic Noon
Fan, Xiaohui; McGreer, Ian D.; Huang, Yun-Hsin +11 more
We have designed the Extremely Luminous Quasar Survey (ELQS) to provide a highly complete census of unobscured UV-bright quasars during the cosmic noon, z = 2.8-5.0. Here we report the discovery of 70 new quasars in the ELQS South Galactic Cap (ELQS-S) quasar sample, doubling the number of known extremely luminous quasars in 4237.3 deg2…
Radio continuum size evolution of star-forming galaxies over 0.35 < z < 2.25
Bondi, M.; Magnelli, B.; Smolčić, V. +18 more
To better constrain the physical mechanisms driving star formation, we present the first systematic study of the radio continuum size evolution of star-forming galaxies (SFGs) over the redshift range 0.35 < z < 2.25. We use the VLA COSMOS 3 GHz map (noise rms = 2.3 µJy beam-1, θbeam = 0.75 arcsec) to construct a m…
TESS Asteroseismology of the Known Red-giant Host Stars HD 212771 and HD 203949
Stock, Stephan; Reffert, Sabine; Chaplin, William J. +45 more
The Transiting Exoplanet Survey Satellite (TESS) is performing a near all-sky survey for planets that transit bright stars. In addition, its excellent photometric precision enables asteroseismology of solar-type and red-giant stars, which exhibit convection-driven, solar-like oscillations. Simulations predict that TESS will detect solar-like oscil…
On the Gaia DR2 distances for Galactic luminous blue variables
Drout, Maria R.; Smith, Nathan; Stassun, Keivan G. +3 more
We examine parallaxes and distances for Galactic luminous blue variables (LBVs) in the Gaia second data release (DR2). The sample includes 11 LBVs and 14 LBV candidates. For about half of the sample, DR2 distances are either similar to commonly adopted literature values, or the DR2 values have large uncertainties. For the rest, reliable DR2 distan…
Record-breaking Coronal Magnetic Field in Solar Active Region 12673
Fleishman, Gregory D.; Anfinogentov, Sergey A.; Stupishin, Alexey G. +1 more
The strongest magnetic fields on the Sun are routinely detected at dark sunspots. The magnitude of the field is typically about 3000 G, with only a few exceptions that reported the magnetic field in excess of 5000 G. Given that the magnetic field decreases with height in the solar atmosphere, no coronal magnetic field above ∼2000 G has ever been r…
Molecular gas and dust properties of galaxies from the Great Observatories All-sky LIRG Survey
Sanders, D. B.; Frayer, D. T.; Kim, D. -C. +23 more
We present IRAM-30 m Telescope 12CO and 13CO observations of a sample of 55 luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) in the local universe. This sample is a subset of the Great Observatory All-Sky LIRG Survey (GOALS), for which we use ancillary multi-wavelength data to better understand their interstell…
SDSS-IV eBOSS Spectroscopy of X-Ray and WISE AGNs in Stripe 82X: Overview of the Demographics of X-Ray- and Mid-infrared-selected Active Galactic Nuclei
Ananna, Tonima Tasnim; Salvato, Mara; Vivek, M. +5 more
We report the results of a Sloan Digital Sky Survey IV eBOSS program to target X-ray sources and mid-infrared-selected Wide-field Infrared Survey Explorer (WISE) active galactic nucleus (AGN) candidates in a 36.8 deg2 region of Stripe 82. About half this survey (15.6 deg2) covers the largest contiguous portion of the Stripe 8…
Revisiting the Long-period Transiting Planets from Kepler
Zhu, Wei; Wu, Yanqin; Herman, Miranda K.
Currently, we have only limited means to probe the presence of planets at large orbital separations. Foreman-Mackey et al. searched for long-period transiting planets in the Kepler light curves using an automated pipeline. Here, we apply their pipeline, with minor modifications, to a larger sample and use updated stellar parameters from Gaia DR2. …