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19912026
Showing 2019 · astro-ph.EPShow all

134 papers · 2 filters

astro-ph.EP2019★ 28 cited

The Detectability and Constraints of Biosignature Gases in the Near & Mid-Infrared from Transit Transmission Spectroscopy

Luke Tremblay, Michael R Line, Kevin B Stevenson +4

The James Webb Space Telescope (JWST) is expected to revolutionize our understanding of Jovian worlds over the coming decade. However, as we push towards characterizing cooler, sma…

astro-ph.EP2019★ 51 cited

Pre-discovery Activity of New Interstellar Comet 2I/Borisov Beyond 5 AU

Quanzhi Ye, Michael S. P. Kelley, Bryce T. Bolin +15

Comet 2I/Borisov, the first unambiguous interstellar comet ever found, was discovered in August 2019 at au from the Sun on its inbound leg. No pre-discovery detection beyon…

astro-ph.EP2019★ 18 cited

TOI 564 b and TOI 905 b: Grazing and Fully Transiting Hot Jupiters Discovered by TESS

Allen B. Davis, Songhu Wang, Matias Jones +46

We report the discovery and confirmation of two new hot Jupiters discovered by the Transiting Exoplanet Survey Satellite (TESS): TOI 564 b and TOI 905 b. The transits of these two…

astro-ph.EP2019★ 71 cited

Are Inner Disc Misalignments Common? ALMA Reveals an Isotropic Outer Disc Inclination Distribution for Young Dipper Stars

M. Ansdell, E. Gaidos, C. Hedges +12

Dippers are a common class of young variable star exhibiting day-long dimmings with depths of up to several tens of percent. A standard explanation is that dippers host nearly edge…

astro-ph.EP2019★ 18 cited

(704) Interamnia: A transitional object between a dwarf planet and a typical irregular-shaped minor body

J. Hanuš, P. Vernazza, M. Viikinkoski +56

With an estimated diameter in the 320 to 350 km range, (704) Interamnia is the fifth largest main belt asteroid and one of the few bodies that fills the gap in size between the fou…

astro-ph.EP2019★ 32 cited

A Twilight Search for Atiras, Vatiras and Co-orbital Asteroids: Preliminary Results

Quanzhi Ye, Frank J. Masci, Wing-Huen Ip +12

Near-Earth Objects (NEOs) that orbit the Sun on or within Earth's orbit are tricky to detect for Earth-based observers due to their proximity to the Sun in the sky. These small bod…

astro-ph.EP2019★ 60 cited

The Young Suns Exoplanet Survey: Detection of a wide orbit planetary mass companion to a solar-type Sco-Cen member

A. J. Bohn, M. A. Kenworthy, C. Ginski +9

The Young Suns Exoplanet Survey (YSES) consists of a homogeneous sample of 70 young, solar-mass stars located in the Lower Centaurus-Crux subgroup of the Scorpius-Centaurus associa…

astro-ph.EP2019★ 25 cited

A parallel-GPU code for asteroid aggregation problems with angular particles

F. Ferrari, M. Lavagna, E. Blazquez

The paper presents a numerical implementation of the gravitational N-body problem with contact interactions between non-spherically shaped bodies. The work builds up on a previous…

astro-ph.EP2019★ 3 cited

Future stellar flybys of the Voyager and Pioneer spacecraft

Coryn A. L. Bailer-Jones, Davide Farnocchia

The Pioneer 10 and 11 and Voyager 1 and 2 spacecraft, launched in the 1970s, are heading out of the solar system. Using the astrometric and radial velocity data from the second Gai…

astro-ph.EP2019★ 5 cited

ALMA and NACO observations towards the young exoring transit system J1407 (V1400 Cen)

M. A. Kenworthy, P. D. Klaassen, M. Min +8

Our aim was to directly detect the thermal emission of the putative exoring system responsible for the complex deep transits observed in the light curve for the young Sco-Cen star…

astro-ph.EP2019★ 44 cited

O2- and CO-Rich Atmospheres for Potentially Habitable Environments on TRAPPIST-1 Planets

Renyu Hu, Luke Peterson, Eric T. Wolf

Small exoplanets of nearby M dwarf stars present the possibility to find and characterize habitable worlds within the next decade. TRAPPIST-1, an ultracool M dwarf star, was recent…

astro-ph.EP2019★ 1 cited

: Planet or Noise?

Jacob Golomb, Graça Rocha, Tiffany Meshkat +5

The work presented here attempts at answering the question: how do we decide when a given adetection is a planet or just residual noise in exoplanet direct imaging data? To this en…

astro-ph.EP2019★ 37 cited

Colour and Tropospheric Cloud Structure of Jupiter from MUSE/VLT: Retrieving a Universal Chromophore

Ashwin S. Braude, Patrick G. J. Irwin, Glenn S. Orton +1

Recent work by Sromovsky et al. (2017, Icarus 291, 232-244) suggested that all red colour in Jupiter's atmosphere could be explained by a single colour-carrying compound, a so-call…

astro-ph.EP2019★ 15 cited

The detection of dust gap-ring structure in the outer region of the CR Cha protoplanetary disk

Seongjoong Kim, Sanemichi Takahashi, Hideko Nomura +13

We observe the dust continuum at 225 GHz and CO isotopologue (12CO, 13CO, and C18O) J=2-1 emission lines toward the CR Cha protoplanetary disk using the Atacama Large Millimeter/Su…

astro-ph.EP2019★ 30 cited

Uranus in Northern Mid-Spring: Persistent Atmospheric Temperatures and Circulations Inferred from Thermal Imaging

Michael T. Roman, Leigh N. Fletcher, Glenn S. Orton +2

We present results from mid-infrared imaging of Uranus at wavelengths of 13.0 micron and 18.7 micron, sensing emission from the stratosphere and upper troposphere, acquired using t…

astro-ph.EP2019★ 17 cited

Revisiting the cosmic-ray induced Venusian radiation dose in the context of habitability

Konstantin Herbst, Saša Banjac, Dimitra Atri +1

The Atmospheric Radiation Interaction Simulator (AtRIS) was used to model the altitude-dependent Venusian absorbed dose and the Venusian dose equivalent. For the first time, we mod…

astro-ph.EP2019★ 49 cited

The Gemini Planet Imager Exoplanet Survey: Dynamical Mass of the Exoplanet beta Pictoris b from Combined Direct Imaging and Astrometry

Eric L. Nielsen, Robert J. De Rosa, Jason J. Wang +51

We present new observations of the planet beta Pictoris b from 2018 with GPI, the first GPI observations following conjunction. Based on these new measurements, we perform a joint…

astro-ph.EP2019★ 7 cited

Atmospheric Characterization and Further Orbital Modeling of And b

Taichi Uyama, Thayne Currie, Yasunori Hori +18

We present Andromeda b's photometry and astrometry taken with Subaru/SCExAO+HiCIAO and Keck/NIRC2, combined with recently published SCExAO/CHARIS low-resolution spectroscopy an…

astro-ph.EP2019★ 6 cited

Aggregate Growth and Internal structures of Chondrite Parent Bodies Forming from Dense Clumps

Yuji Matsumoto, Shigeru Wakita, Yasuhiro Hasegawa +1

Major components of chondrites are chondrules and matrix. Measurements of the volatile abundance in Semarkona chondrules suggest that chondrules formed in a dense clump that had a…

astro-ph.EP2019★ 20 cited

First Resolved Scattered-Light Images of Four Debris Disks in Scorpius-Centaurus with the Gemini Planet Imager

Justin Hom, Jennifer Patience, Thomas M. Esposito +57

We present the first spatially resolved scattered-light images of four debris disks around members of the Scorpius-Centaurus (Sco-Cen) OB Association with high-contrast imaging and…

astro-ph.EP2019★ 22 cited

Orbits and resonances of the regular moons of Neptune

Marina Brozović, Mark R. Showalter, Robert A. Jacobson +3

We report integrated orbital fits for the inner regular moons of Neptune based on the most complete astrometric data set to date, with observations from Earth-based telescopes, Voy…

astro-ph.EP2019★ 27 cited

Information in the Reflected Light Spectra of Widely Separated Giant Exoplanets

Renyu Hu

Giant exoplanets located >1 AU away from their parent stars have atmospheric environments cold enough for water and/or ammonia clouds. We have developed a new equilibrium cloud and…

astro-ph.EP2019★ 26 cited

TESS Reveals HD 118203 b to be a Transiting Planet

Joshua Pepper, Stephen R. Kane, Joseph E. Rodriguez +30

The exoplanet HD 118203 b, orbiting a bright (V = 8.05) host star, was discovered using the radial velocity method by da Silva et al. (2006), but was not previously known to transi…

astro-ph.EP2019★ 22 cited

Observations and numerical modelling of a convective disturbance in a large-scale cyclone in Jupiter's South Temperate Belt

P. Iñurrigarro, R. Hueso, J. Legarreta +8

Moist convective storms in Jupiter develop frequently and can trigger atmospheric activity of different scales, from localized storms to planetary-scale disturbances including conv…