Search Publications
Cataclysmic Variables in the First Year of the Zwicky Transient Facility
Riddle, Reed; Szkody, Paula; Bellm, Eric C. +25 more
Using selection criteria based on amplitude, time, and color, we have identified 329 objects as known or candidate cataclysmic variables (CVs) during the first year of testing and operation of the Zwicky Transient Facility. Of these, 90 are previously confirmed CVs, 218 are strong candidates based on the shape and color of their light curves obtai…
Transmission Spectroscopy of WASP-79b from 0.6 to 5.0 µm
Jayaraman, Rahul; Nikolov, Nikolay; Sing, David K. +18 more
As part of the Panchromatic Exoplanet Treasury program, we have conducted a spectroscopic study of WASP-79b, an inflated hot Jupiter orbiting an F-type star in Eridanus with a period of 3.66 days. Building on the original WASP and TRAPPIST photometry of Smalley et al., we examine Hubble Space Telescope (HST)/Wide Field Camera 3 (WFC3) (1.125-1.650…
The TESS-Keck Survey. III. A Stellar Obliquity Measurement of TOI-1726 c
Kristiansen, Martti H.; Batalha, Natalie M.; Latham, David W. +43 more
We report the measurement of a spectroscopic transit of TOI-1726c, one of two planets transiting a G-type star with V = 6.9 in the Ursa Major Moving Group (∼400 Myr). With a precise age constraint from cluster membership, TOI-1726 provides a great opportunity to test various obliquity excitation scenarios that operate on different timescales. By m…
WIYN Open Cluster Study. LXXXII. Radial-velocity Measurements and Spectroscopic Binary Orbits in the Open Cluster NGC 7789
Platais, Imants; Tofflemire, Benjamin M.; Mathieu, Robert D. +4 more
We present an extensive time-series radial-velocity (RV) survey of stars in the rich open cluster NGC 7789 (1.6 Gyr, [Fe/H] = +0.02). The stellar sample lies within an 18' circular radius from the cluster center (10 pc in projection, or about 2 core radii), and includes giants, red clump stars, blue stragglers, red stragglers, sub-subgiants, and m…
Robo-AO M-dwarf Multiplicity Survey: Catalog
Baranec, Christoph; Duev, Dmitry A.; Jensen-Clem, Rebecca +10 more
We analyze observations from Robo-AO's field M dwarf survey taken on the 2.1 m Kitt Peak telescope and perform a multiplicity comparison with Gaia DR2. Through its laser-guided, automated system, the Robo-AO instrument has yielded the largest adaptive optics M dwarf multiplicity survey to date. After developing an interface to visually identify an…
Estimating the Ultraviolet Emission of M Dwarfs with Exoplanets from Ca II and Hα
Loyd, R. O. Parke; Peacock, Sarah; Redfield, Seth +29 more
M dwarf stars are excellent candidates around which to search for exoplanets, including temperate, Earth-sized planets. To evaluate the photochemistry of the planetary atmosphere, it is essential to characterize the UV spectral energy distribution of the planet's host star. This wavelength regime is important because molecules in the planetary atm…
A Gaia Survey for Young Stars Associated with the Lupus Clouds
Luhman, K. L.
I have used high-precision photometry and astrometry from the second data release of the Gaia mission to perform a survey for young stars associated with the Lupus clouds, which have distances of ∼160 pc and reside within the Scorpius-Centaurus (Sco-Cen) OB association. The Gaia data have made it possible to distinguish Lupus members from most of …
A Highly Eccentric Warm Jupiter Orbiting TIC 237913194
Trifonov, Trifon; Henning, Thomas; Latham, David W. +28 more
The orbital parameters of warm Jupiters serve as a record of their formation history, providing constraints on formation scenarios for giant planets on close and intermediate orbits. Here, we report the discovery of TIC 237913194b, detected in full-frame images from Sectors 1 and 2 of the Transiting Exoplanet Survey Satellite (TESS), ground-based …
A Featureless Infrared Transmission Spectrum for the Super-puff Planet Kepler-79d
Deming, Drake; Madhusudhan, Nikku; Wakeford, Hannah R. +12 more
Extremely low-density planets ("super-puffs") are a small but intriguing subset of the transiting planet population. With masses in the super-Earth range (1 - 10 ${M}_{\oplus }$ ) and radii akin to those of giant planets (> 4 ${R}_{\oplus }$ ), their large envelopes may have been accreted beyond the water snow line and many appear to be suscept…
Speckle Interferometry at SOAR in 2019
Tokovinin, Andrei; Horch, Elliott P.; Mason, Brian D. +2 more
The results of speckle-interferometric observations at the 4.1 m Southern Astrophysical Research Telescope in 2019 are given, totaling 2555 measurements of 1972 resolved pairs with separations from 15 mas (median 0"21) and magnitude difference up to 6 mag, and non-resolutions of 684 targets. We resolved for the first time 90 new pairs or subsystem…