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Planetary Candidates from K2 Campaign 16
Henning, Thomas; Schlieder, Joshua E.; Fulton, Benjamin J. +20 more
Given that Campaign 16 of the K2 mission is one of just two K2 campaigns observed so far in “forward-facing” mode, which enables immediate follow-up observations from the ground, we present a catalog of interesting targets identified through photometry alone. Our catalog includes 30 high-quality planet candidates (showing no signs of being non-pla…
Direct Imaging of the HD 35841 Debris Disk: A Polarized Dust Ring from Gemini Planet Imager and an Outer Halo from HST/STIS
Duchêne, Gaspard; Esposito, Thomas M.; Oppenheimer, Rebecca +55 more
We present new high resolution imaging of a light-scattering dust ring and halo around the young star HD 35841. Using spectroscopic and polarimetric data from the Gemini Planet Imager in H-band (1.6 µm), we detect the highly inclined (i = 85°) ring of debris down to a projected separation of ∼12 au (∼0.″12) for the first time. Optical imagin…
Discovery of a Transiting Adolescent Sub-Neptune Exoplanet with K2
Vanderburg, Andrew; Bieryla, Allyson; Latham, David W. +19 more
The role of stellar age in the measured properties and occurrence rates of exoplanets is not well understood. This is in part due to a paucity of known young planets and the uncertainties in age-dating for most exoplanet host stars. Exoplanets with well-constrained ages, particularly those which are young, are useful as benchmarks for studies aimi…
The Gas Composition and Deep Cloud Structure of Jupiter's Great Red Spot
Wong, M. H.; Orton, G. S.; de Pater, I. +3 more
We have obtained high-resolution spectra of Jupiter’s Great Red Spot (GRS) between 4.6-5.4 µm using telescopes on Mauna Kea to derive gas abundances and to constrain its cloud structure between 0.5-5 bars. We used line profiles of deuterated methane (CH3D) at 4.66 µm to infer the presence of an opaque cloud at 5 ± 1 bars. Fr…
The Warm Neptunes around HD 106315 Have Low Stellar Obliquities
Vanderburg, Andrew; Bieryla, Allyson; Latham, David W. +8 more
We present the obliquity of the warm Neptune HD 106315c measured via a series of spectroscopic transit observations. HD 106315c is a 4.4 R Earth warm Neptune orbiting a moderately rotating late F star with a period of 21.05 days. HD 106315 also hosts a 2.5 R Earth super-Earth on a 9.55 day orbit. Our Doppler tomographic analy…
Fundamental Properties of Co-moving Stars Observed by Gaia
Faherty, Jacqueline K.; Gagné, Jonathan; Bochanski, John J. +5 more
We have estimated fundamental parameters for a sample of co-moving stars observed by Gaia and identified by Oh et al. We matched the Gaia observations to the 2MASS and Wide-Field Infrared Survey Explorer catalogs and fit MIST isochrones to the data, deriving estimates of the mass, radius, [Fe/H], age, distance, and extinction to 9754 stars in the …
Memberships of the Open Cluster NGC 6405 Based on a Combined Method: Gaussian Mixture Model and Random Forest
Gao, Xinhua
This paper presents a combined method of Gaussian mixture model and random forest to compute membership probabilities of stars by using large, high-dimensional data sets. A significant advantage of this method is that it allows us to easily identify likely cluster members in large data sets starting from small training samples. As a benchmark, we …
Four New Eclipsing Mid M-dwarf Systems from the New Luyten Two Tenths Catalog
Latham, David W.; Berlind, Perry; Calkins, Michael L. +7 more
Using data from the MEarth-North and MEarth-South transit surveys, we present the detection of eclipses in four mid M-dwarf systems: LP 107-25, LP 261-75, LP 796-24, and LP 991-15. Combining the MEarth photometry with spectroscopic follow-up observations, we show that LP 107-25 and LP 796-24 are short-period (1.388 and 0.523 day, respectively) ecl…
The Hawaii Infrared Parallax Program. III. 2MASS J0249-0557 c: A Wide Planetary-mass Companion to a Low-mass Binary in the β Pic Moving Group
Kratter, Kaitlin M.; Dupuy, Trent J.; Kraus, Adam L. +6 more
We have discovered a wide planetary-mass companion to the β Pic moving group member 2MASS J02495639-0557352 (M6 VL-G) using Canada-France-Hawaii Telescope/WIRCam astrometry from the Hawaii Infrared Parallax Program. In addition, Keck laser guide star adaptive optics aperture-masking interferometry shows that the host is itself a tight binary. Alto…
First Data Release of the All-sky NOAO Source Catalog
Nidever, David L.; Olsen, Knut; Dey, Arjun +6 more
Most of the sky has been imaged with NOAO’s telescopes from both hemispheres. While the large majority of these data were obtained for PI-led projects and almost all of the images are publicly available, only a small fraction have been released to the community via well-calibrated and easily accessible catalogs. We are remedying this by creating a…