Search Publications
The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones for Testing the Effects of Starspots on Structure and Colors
Somers, Garrett; Pinsonneault, Marc H.; Cao, Lyra
One-dimensional stellar evolution models have been successful at representing the structure and evolution of stars in diverse astrophysical contexts, but complications have been noted in the context of young, magnetically active stars, as well as close binary stars with significant tidal interactions. Numerous puzzles are associated with pre-main-…
GROWTH on S190814bv: Deep Synoptic Limits on the Optical/Near-infrared Counterpart to a Neutron Star-Black Hole Merger
Cenko, S. Bradley; Kong, Albert K. H.; Gromadzki, Mariusz +49 more
On 2019 August 14, the Advanced LIGO and Virgo interferometers detected the high-significance gravitational wave (GW) signal S190814bv. The GW data indicated that the event resulted from a neutron star-black hole (NSBH) merger, or potentially a low-mass binary BH merger. Due to the low false-alarm rate and the precise localization (23 deg2
Rotation Curves in z ∼ 1-2 Star-forming Disks: Evidence for Cored Dark Matter Distributions
Lutz, D.; Wuyts, S.; Förster Schreiber, N. M. +22 more
We report high-quality, Hα or CO rotation curves (RCs) to several Re for 41 large, massive, star-forming disk galaxies (SFGs) across the peak of cosmic galaxy evolution (z ∼ 0.67-2.45), taken with the ESO-VLT, the LBT and IRAM-NOEMA. Most RC41 SFGs have reflection-symmetric RCs plausibly described by equilibrium dynamics. We fit the maj…
PLATON II: New Capabilities and a Comprehensive Retrieval on HD 189733b Transit and Eclipse Data
Knutson, Heather A.; Zhang, Michael; Kempton, Eliza M. -R. +2 more
Recently, we introduced PLanetary Atmospheric Tool for Observer Noobs (PLATON), a Python package that calculates model transmission spectra for exoplanets and retrieves atmospheric characteristics based on observed spectra. We now expand its capabilities to include the ability to compute secondary eclipse depths. We have also added the option to c…
RELICS: The Reionization Lensing Cluster Survey and the Brightest High-z Galaxies
Frye, Brenda L.; Strait, Victoria; Lovisari, Lorenzo +32 more
Massive foreground galaxy clusters magnify and distort the light of objects behind them, permitting a view into both the extremely distant and intrinsically faint galaxy populations. We present here the $z\sim 6\mbox{--}8$ candidate high-redshift galaxies from the Reionization Lensing Cluster Survey (RELICS), a Hubble and Spitzer Space Telescope s…
Keeping It Cool: Much Orbit Migration, yet Little Heating, in the Galactic Disk
Ting, Yuan-Sen; Rix, Hans-Walter; Frankel, Neige +1 more
A star in the Milky Way's disk can now be at a Galactocentric radius quite distant from its birth radius for two reasons: either its orbit has become eccentric through radial heating, which increases its radial action JR ("blurring"), or merely its angular momentum Lz has changed and thereby its guiding radius ("churning"). W…
The Lyman Continuum Escape Survey. II. Ionizing Radiation as a Function of the [O III]/[O II] Line Ratio
Tang, Mengtao; Stark, Daniel P.; Ellis, Richard S. +2 more
We discuss the rest-frame optical emission line spectra of a large (∼50) sample of z ∼ 3.1 Lyα emitting galaxies (LAEs) whose physical properties suggest such sources are promising analogs of galaxies in the reionization era. Reliable Lyman continuum (LyC) escape fractions have now been determined for a large sample of such LAEs from the LymAn Con…
Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. XI. Accretion Disk Reverberation Mapping of Mrk 142
Ho, Luis C.; Barth, Aaron J.; Horne, Keith +15 more
We performed an intensive accretion disk reverberation mapping campaign on the high accretion rate active galactic nucleus Mrk 142 in early 2019. Mrk 142 was monitored with the Neil Gehrels Swift Observatory for four months in X-rays and six different UV/optical filters. Ground-based photometric monitoring was obtained from the Las Cumbres Observa…
Initiation and Early Kinematic Evolution of Solar Eruptions
Inhester, B.; Cheng, X.; Ding, M. D. +5 more
We investigate the initiation and early evolution of 12 solar eruptions, including six active-region hot channel and six quiescent filament eruptions, which were well observed by the Solar Dynamics Observatory, as well as by the Solar Terrestrial Relations Observatory for the latter. The sample includes one failed eruption and 11 coronal mass ejec…
Wide-field Survey of Dwarf Satellite Systems around 10 Hosts in the Local Volume
Greene, Jenny E.; Beaton, Rachael L.; Carlsten, Scott G. +1 more
We present the results of an extensive search for dwarf satellite galaxies around 10 primary host galaxies in the Local Volume (LV, D < 12 Mpc) using archival CFHT/MegaCam imaging data. The hosts span a wide range in properties, with stellar masses ranging from that of the Large Magellanic Cloud to ∼3 times that of the Milky Way. The surveyed h…