Showing 2017 · astro-ph.EPShow all

32 papers · 2 filters

astro-ph.EP2017★ 15 cited

Predictions of planet detections with near infrared radial velocities in the up-coming SPIRou Legacy Survey-Planet Search

Ryan Cloutier, Étienne Artigau, Xavier Delfosse +8

The SPIRou near infrared spectro-polarimeter is destined to begin science operations at the Canada-France-Hawaii Telescope in mid-2018. One of the instrument's primary science goal…

astro-ph.EP2017★ 41 cited

A dearth of small particles in the transiting material around the white dwarf WD 1145+017

S. Xu, S. Rappaport, R. van Lieshout +35

White dwarf WD 1145+017 is orbited by several clouds of dust, possibly emanating from actively disintegrating bodies. These dust clouds reveal themselves through deep, broad, and e…

astro-ph.EP2017

Constraints on the Obliquities of Kepler Planet-Hosting Stars

Joshua N. Winn, Erik A. Petigura, Timothy D. Morton +8

Stars with hot Jupiters have obliquities ranging from 0-180 degrees, but relatively little is known about the obliquities of stars with smaller planets. Using data from the Califor…

astro-ph.EP2017★ 71 cited

Simulated JWST/NIRISS Transit Spectroscopy of Anticipated TESS Planets Compared to Select Discoveries from Space-Based and Ground-Based Surveys

Dana R. Louie, Drake Deming, Loic Albert +3

The Transiting Exoplanet Survey Satellite (TESS) will embark in 2018 on a 2-year wide-field survey mission, discovering over a thousand terrestrial, super-Earth and sub-Neptune-siz…

astro-ph.EP2017★ 21 cited

PSYM-WIDE: a survey for large-separation planetary-mass companions to late spectral type members of young moving groups

Marie-Eve Naud, Étienne Artigau, René Doyon +5

We present the results of a direct-imaging survey for very large separation (100 au), companions around 95 nearby young K5-L5 stars and brown dwarfs. They are high-likelihood ca…

astro-ph.EP2017★ 19 cited

A search for photometric variability in the young T3.5 planetary-mass companion GU Psc b

Marie-Eve Naud, Étienne Artigau, Jason F. Rowe +5

We present a photometric -band variability study of GU Psc b, a T3.5 co-moving planetary-mass companion (9-13) to a young (150 Myr) M3 member of the AB Dorad…

astro-ph.EP2017★ 62 cited

The Very Low Albedo of WASP-12b From Spectral Eclipse Observations with

Taylor J. Bell, Nikolay Nikolov, Nicolas B. Cowan +11

We present an optical eclipse observation of the hot Jupiter WASP-12b using the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. These spectra allow us to…

astro-ph.EP2017★ 75 cited

K2-136: A Hyades Binary Star with a Neptune-sized Planet

David R. Ciardi, Ian J. M. Crossfield, Adina D. Feinstein +14

We report the discovery of a Neptune-size planet (Rp = 3.0 Re) in the Hyades Cluster. The host star is in a binary system, comprising a K5V star and M7/8V star with a projected sep…

astro-ph.EP2017★ 102 cited

Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

R. Cloutier, N. Astudillo-Defru, R. Doyon +16

The bright M dwarf K2-18 at 34 pc is known to host a transiting super-Earth-sized planet orbiting within the star's habitable zone; K2-18b. Given the superlative nature of this sys…

astro-ph.EP2017★ 43 cited

Detection of Water Vapor in the Thermal Spectrum of the Non-Transiting Hot Jupiter upsilon Andromedae b

Danielle Piskorz, Bjorn Benneke, Nathan R. Crockett +6

The upsilon Andromedae system was the first multi-planet system discovered orbiting a main sequence star. We describe the detection of water vapor in the atmosphere of the innermos…

astro-ph.EP2017★ 55 cited

Phase Offsets and the Energy Budgets of Hot Jupiters

Joel C. Schwartz, Zane Kashner, Diana Jovmir +1

Thermal phase curves of short-period planets on circular orbits provide joint constraints on the fraction of incoming energy that is reflected (Bond albedo) and the fraction of abs…

astro-ph.EP2017★ 91 cited

Three's Company: An additional non-transiting super-Earth in the bright HD 3167 system, and masses for all three planets

Jessie L. Christiansen, Andrew Vanderburg, Jennifer Burt +55

HD 3167 is a bright (V = 8.9), nearby K0 star observed by the NASA K2 mission (EPIC 220383386), hosting two small, short-period transiting planets. Here we present the results of a…

astro-ph.EP2017★ 327 cited

The California-Kepler Survey V. Peas in a Pod: Planets in a Kepler Multi-planet System are Similar in Size and Regularly Spaced

Lauren M. Weiss, Geoffrey W. Marcy, Erik A. Petigura +10

We have established precise planet radii, semimajor axes, incident stellar fluxes, and stellar masses for 909 planets in 355 multi-planet systems discovered by Kepler. In this samp…

astro-ph.EP2017★ 85 cited

Seeing double with K2: Testing re-inflation with two remarkably similar planets around red giant branch stars

Samuel K. Grunblatt, Daniel Huber, Eric Gaidos +15

Despite more than 20 years since the discovery of the first gas giant planet with an anomalously large radius, the mechanism for planet inflation remains unknown. Here, we report t…

astro-ph.EP2017★ 119 cited

Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter

Jean-Baptiste Ruffio, Bruce Macintosh, Jason J. Wang +49

We present a new matched filter algorithm for direct detection of point sources in the immediate vicinity of bright stars. The stellar Point Spread Function (PSF) is first subtract…

astro-ph.EP2017★ 130 cited

Characterizing 51 Eri b from 1-5 m: a partly-cloudy exoplanet

Abhijith Rajan, Julien Rameau, Robert J. De Rosa +58

We present spectro-photometry spanning 1-5 m of 51 Eridani b, a 2-10 M planet discovered by the Gemini Planet Imager Exoplanet Survey. In this study, we present new…

astro-ph.EP2017★ 44 cited

K2-66b and K2-106b: Two extremely hot sub-Neptune-size planets with high densities

Evan Sinukoff, Andrew W. Howard, Erik A. Petigura +20

We report precise mass and density measurements of two extremely hot sub-Neptune-size planets from the K2 mission using radial velocities, K2 photometry, and adaptive optics imagin…

astro-ph.EP2017★ 40 cited

Evidence that the Directly-Imaged Planet HD 131399 Ab is a Background Star

Eric L. Nielsen, Robert J. De Rosa, Julien Rameau +55

We present evidence that the recently discovered, directly-imaged planet HD 131399 Ab is a background star with non-zero proper motion. From new JHK1L' photometry and spectroscopy…

astro-ph.EP2017★ 83 cited

An Optical/near-infrared investigation of HD 100546 b with the Gemini Planet Imager and MagAO

Julien Rameau, Katherine B. Follette, Laurent Pueyo +52

We present H band spectroscopic and Halpha photometric observations of HD 100546 obtained with GPI and MagAO. We detect H band emission at the location of the protoplanet HD 100546…

astro-ph.EP2017★ 104 cited

Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO

Katherine B. Follette, Julien Rameau, Ruobing Dong +53

We present optical and near-infrared high contrast images of the transitional disk HD 100546 taken with the Magellan Adaptive Optics system (MagAO) and the Gemini Planet Imager (GP…

astro-ph.EP2017★ 18 cited

Models of Star-Planet Magnetic Interaction

A. Strugarek

Magnetic interactions between a planet and its environment are known to lead to phenomena such as aurorae and shocks in the solar system. The large number of close-in exoplanets th…

astro-ph.EP2017★ 27 cited

Kepler-1649b: An Exo-Venus in the Solar Neighborhood

Isabel Angelo, Jason F. Rowe, Steve B. Howell +8

The Kepler mission has revealed that Earth-sized planets are common, and dozens have been discovered to orbit in or near their host star's habitable zone. A major focus in astronom…

astro-ph.EP2017★ 123 cited

Orbits for the Impatient: A Bayesian Rejection Sampling Method for Quickly Fitting the Orbits of Long-Period Exoplanets

Sarah Blunt, Eric L. Nielsen, Robert J. De Rosa +11

We describe a Bayesian rejection sampling algorithm designed to efficiently compute posterior distributions of orbital elements for data covering short fractions of long-period exo…

astro-ph.EP2017★ 22 cited

Integral Field Spectroscopy of the Low-Mass Companion HD984B with the Gemini Planet Imager

Mara Johnson-Groh, Christian Marois, Robert J. De Rosa +49

We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager as a part of the Gemini Planet Imager Exoplanet Survey campaign. Images of HD 98…