Search Publications
Long-period Giant Companions to Three Compact, Multiplanet Systems
Fulton, Benjamin J.; Hirsch, Lea A.; Howard, Andrew W. +7 more
Understanding the relationship between long-period giant planets and multiple smaller short-period planets is critical for formulating a complete picture of planet formation. This work characterizes three such systems. We present Kepler-65, a system with an eccentric (e = 0.28 ± 0.07) giant planet companion discovered via radial velocities (RVs) e…
The VLT-FLAMES Tarantula Survey. XXX. Red stragglers in the clusters Hodge 301 and SL 639
van Loon, J. Th.; Lennon, D. J.; Herrero, A. +10 more
Aims: We estimate physical parameters for the late-type massive stars observed as part of the VLT-FLAMES Tarantula Survey (VFTS) in the 30 Doradus region of the Large Magellanic Cloud (LMC).
Methods: The observational sample comprises 20 candidate red supergiants (RSGs) which are the reddest ((B - V) > 1 mag) and brightest (V < 16 …
Jets blowing bubbles in the young radio galaxy 4C 31.04
Groves, Brent; Mukherjee, Dipanjan; Wagner, Alexander Y. +5 more
We report the discovery of shocked molecular and ionized gas resulting from jet-driven feedback in the low-redshift (z = 0.0602) compact radio galaxy 4C 31.04 using near-IR imaging spectroscopy. 4C 31.04 is a ∼100 pc double-lobed Compact Steep Spectrum source believed to be a very young active galactic nucleus (AGN). It is hosted by a giant ellipt…
The TRGB Distance to the Second Galaxy “Missing Dark Matter”: Evidence for Two Groups of Galaxies at 13.5 and 19 Mpc in the Line of Sight of NGC 1052
Trujillo, Ignacio; Monelli, Matteo
A second galaxy “missing dark matter” (NGC 1052-DF4) has been reported recently. Here we show, using the location of the tip of the red giant branch (TRGB), that the distance to this galaxy is 14.2 ± 0.7 Mpc. This locates the galaxy 6 Mpc closer than previously determined. We also analyze the distances to the brightest galaxies in the field of vie…
Probing the final-stage progenitor evolution for Type IIP Supernova 2017eaw in NGC 6946
Wang, Lifan; Wang, Xiaofeng; Zhang, Jujia +6 more
We presented a detailed analysis of progenitor properties of type IIP supernova 2017eaw in NGC 6946, based on the pre-explosion images and early-time observations obtained immediately after the explosion. An unusually red star, with MF814W = -6.9 mag and mF606W - mF814W = 2.9 ± 0.2 mag, can be identified at the SN …
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…