Search Publications
A Hubble PanCET Study of HAT-P-11b: A Cloudy Neptune with a Low Atmospheric Metallicity
Nikolov, Nikolay; Mikal-Evans, Thomas; Sing, David K. +14 more
We present the first comprehensive look at the 0.35-5 µm transmission spectrum of the warm (∼800 K) Neptune HAT-P-11b derived from 13 individual transits observed using the Hubble and Spitzer Space Telescopes. Along with the previously published molecular absorption feature in the 1.1-1.7 µm bandpass, we detect a distinct absorption fe…
On the Mass Accretion Rate and Infrared Excess in Herbig Ae/Be Stars
Arun, R.; Mathew, Blesson; Manoj, P. +5 more
The present study makes use of the unprecedented capability of the Gaia mission to obtain the stellar parameters such as distance, age, and mass of HAeBe stars. The accuracy of Gaia DR2 astrometry is demonstrated from the comparison of the Gaia DR2 distances of 131 HAeBe stars with the previously estimated values from the literature. This is one o…
WOBBLE: A Data-driven Analysis Technique for Time-series Stellar Spectra
Hogg, David W.; Foreman-Mackey, Daniel; Bedell, Megan +2 more
In recent years, dedicated extreme precision radial velocity (RV) spectrographs have produced vast quantities of high-resolution, high-signal-to-noise (S/N) time-series spectra for bright stars. These data contain valuable information for the dual purposes of planet detection via the measured RVs and stellar characterization via the coadded spectr…
Online Database of Class I Methanol Masers
Ladeyschikov, Dmitry A.; Sobolev, Andrey M.; Bayandina, Olga S.
In this paper, we present a database of class I methanol masers. The compiled information from the available literature provides an open and fast access to the data on class I methanol maser emission, including search, analysis, and visualization of the extensive maser data set. There is information on individual maser components detected with sin…
An Eccentric Massive Jupiter Orbiting a Subgiant on a 9.5-day Period Discovered in the Transiting Exoplanet Survey Satellite Full Frame Images
Henning, Thomas; Torres, Guillermo; Barclay, Thomas +71 more
We report the discovery of TOI-172 b from the Transiting Exoplanet Survey Satellite (TESS) mission, a massive hot Jupiter transiting a slightly evolved G star with a 9.48-day orbital period. This is the first planet to be confirmed from analysis of only the TESS full frame images, because the host star was not chosen as a two-minute cadence target…
Near-resonance in a System of Sub-Neptunes from TESS
Kristiansen, Martti H.; Vanderburg, Andrew; Latham, David W. +78 more
We report the Transiting Exoplanet Survey Satellite detection of a multi-planet system orbiting the V = 10.9 K0 dwarf TOI-125. We find evidence for up to five planets, with varying confidence. Three transit signals with high signal-to-noise ratio correspond to sub-Neptune-sized planets (2.76, 2.79, and 2.94 R ⊕), and we statistically va…
Identifying Exoplanets with Deep Learning. II. Two New Super-Earths Uncovered by a Neural Network in K2 Data
Vanderburg, Andrew; Dattilo, Anne; Bieryla, Allyson +10 more
For years, scientists have used data from NASA’s Kepler Space Telescope to look for and discover thousands of transiting exoplanets. In its extended K2 mission, Kepler observed stars in various regions of the sky all across the ecliptic plane, and therefore in different galactic environments. Astronomers want to learn how the populations of exopla…
Discovery of Three New Transiting Hot Jupiters: WASP-161 b, WASP-163 b, and WASP-170 b
Bouchy, F.; Queloz, D.; Delrez, L. +28 more
We present the discovery of three new transiting hot Jupiters by the WASP-South project, WASP-161 b, WASP-163 b, and WASP-170 b. Follow-up radial velocities obtained with the Euler/CORALIE spectrograph and transit light curves obtained with the TRAPPIST-North, TRAPPIST-South, SPECULOOS-South, NITES, and Euler telescopes have enabled us to determin…
Giant Planet Occurrence within 0.2 au of Low-luminosity Red Giant Branch Stars with K2
Huber, Daniel; Gaidos, Eric; Stello, Dennis +3 more
Every Sun-like star will eventually evolve into a red giant, a transition which can profoundly affect the evolution of a surrounding planetary system. The timescale of dynamical planet evolution and orbital decay has important implications for planetary habitability, as well as post-main-sequence star and planet interaction, evolution, and interna…
Radii of 88 M Subdwarfs and Updated Radius Relations for Low-metallicity M-dwarf Stars
Kesseli, Aurora Y.; Muirhead, Philip S.; Cushing, Michael C. +9 more
M subdwarfs are low-metallicity M dwarfs that typically inhabit the halo population of the Galaxy. Metallicity controls the opacity of stellar atmospheres; in metal-poor stars, hydrostatic equilibrium is reached at a smaller radius, leading to smaller radii for a given effective temperature. We compile a sample of 88 stars that span spectral class…