Showing 2019 · astro-ph.EPShow all

121 papers · 2 filters

astro-ph.EP2019★ 11 cited

OGLE-2013-BLG-0911Lb: A Secondary on the Brown-Dwarf Planet Boundary around an M-dwarf

Shota Miyazaki, Takahiro Sumi, David P. Bennett +92

We present the analysis of the binary-lens microlensing event OGLE-2013-BLG-0911. The best-fit solutions indicate the binary mass ratio of q~0.03 which differs from that reported i…

astro-ph.EP2019★ 37 cited

Andrade rheology in time-domain. Application to Enceladus' dissipation of energy due to forced libration

Yeva Gevorgyan, Gwenaël Boué, Clodoaldo Ragazzo +2

The main purpose of this work is to present a time-domain implementation of the Andrade rheology, instead of the traditional expansion in terms of a Fourier series of the tidal pot…

astro-ph.EP2019★ 62 cited

A new chemical scheme for giant planet thermochemistry. Update of the methanol chemistry and new reduced chemical scheme

Olivia Venot, Thibault Cavalié, Roda Bounaceur +3

Several chemical networks have been developed to study warm (exo)planetary atmospheres. The kinetics of the reactions related to the methanol chemistry included in these schemes ha…

astro-ph.EP2019★ 231 cited

Mass-Metallicity Trends in Transiting Exoplanets from Atmospheric Abundances of HO, Na, and K

Luis Welbanks, Nikku Madhusudhan, Nicole F. Allard +3

Atmospheric compositions can provide powerful diagnostics of formation and migration histories of planetary systems. We investigate constraints on atmospheric abundances of HO,…

astro-ph.EP2019★ 141 cited

Peering into the formation history of beta Pictoris b with VLTI/GRAVITY long baseline interferometry

GRAVITY Collaboration, M. Nowak, S. Lacour +65

Our objective is to estimate the C/O ratio in the atmosphere of beta Pictoris b and obtain an estimate of the dynamical mass of the planet, as well as to refine its orbital paramet…

astro-ph.EP2019★ 14 cited

Debris Disks in Multi-Planet Systems: Are Our Inferences Compromised by Unseen Planets?

Jiayin Dong, Rebekah I. Dawson, Andrew Shannon +1

Resolved debris disk features (e.g., warps, offsets, edges and gaps, azimuthal asymmetries, radially thickened rings, scale heights) contain valuable information about the underlyi…

astro-ph.EP2019★ 24 cited

A dusty benchmark brown dwarf near the ice line of HD 72946

A. -L. Maire, J. -L. Baudino, S. Desidera +12

Context. HD72946 is a bright and nearby solar-type star hosting a low-mass companion at long period (P~16 yr) detected with the radial velocities (RV) method. The companion has a m…

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★ 45 cited

Martian water ice clouds during the 2018 global dust storm as observed by the ACS-MIR channel onboard the Trace Gas Orbiter

Aurélien Stcherbinine, Mathieu Vincendon, Franck Montmessin +8

The Atmospheric Chemistry Suite (ACS) instrument onboard the ExoMars Trace Gas Orbiter (TGO) ESA-Roscosmos mission began science operations in March 2018. ACS Mid InfraRed (MIR) ch…

astro-ph.EP2019★ 21 cited

RefPlanets: Search for reflected light from extra-solar planets with SPHERE/ZIMPOL

S. Hunziker, H. M. Schmid, D. Mouillet +55

RefPlanets is a guaranteed time observation (GTO) programme that uses the Zurich IMaging POLarimeter (ZIMPOL) of SPHERE/VLT for a blind search for exoplanets in wavelengths from 60…

astro-ph.EP2019★ 67 cited

Shadowing and multiple rings in the protoplanetary disk of HD 139614

G. A. Muro-Arena, M. Benisty, C. Ginski +20

Shadows in scattered light images of protoplanetary disks are a common feature and support the presence of warps or misalignments between disk regions. These warps are possibly due…

astro-ph.EP2019★ 132 cited

Impact of Clouds and Hazes on the Simulated JWST Transmission Spectra of Habitable Zone Planets in the TRAPPIST-1 System

Thomas J. Fauchez, Martin Turbet, Geronimo L. Villanueva +9

The TRAPPIST-1 system, consisting of an ultra-cool host star having seven known Earth-size planets will be a prime target for atmospheric characterization with JWST. However, the d…

astro-ph.EP2019★ 27 cited

Modeling Kelvin-Helmholtz instability-driven turbulence with hybrid simulations of Alfvénic turbulence

Luca Franci, Julia E. Stawarz, Emanuele Papini +9

Magnetospheric Multiscale (MMS) observations of plasma turbulence generated by a Kelvin-Helmholtz (KH) event at the Earth's magnetopause are compared with a high-resolution two-dim…

astro-ph.EP2019★ 73 cited

Idealised simulations of the deep atmosphere of hot jupiters: Deep, hot, adiabats as a robust solution to the radius inflation problem

F. Sainsbury-Martinez, P. Wang, S. Fromang +10

Context: The anomalously large radii of hot Jupiters has long been a mystery. However, by combining both theoretical arguments and 2D models, a recent study has suggested that the…

astro-ph.EP2019★ 27 cited

Circumbinary exoplanets and brown dwarfs with the Laser Interferometer Space Antenna

Camilla Danielski, Valeriya Korol, Nicola Tamanini +1

We explore the prospects for the detection of giant circumbinary exoplanets and brown dwarfs (BDs) orbiting Galactic double white dwarfs binaries (DWDs) with the Laser Interferomet…

astro-ph.EP2019★ 5 cited

Debris disks around stars in the NIKA2 era

J. -F. Lestrade, J. -C. Augereau, M. Booth +42

The new NIKA2 camera at the IRAM 30m radiotelescope was used to observe three known debris disks in order to constrain the SED of their dust emission in the millimeter wavelength d…

astro-ph.EP2019★ 4 cited

Probing the subsurface of the two faces of Iapetus

Léa E. Bonnefoy, Jean-François Lestrade, Emmanuel Lellouch +4

Saturn's moon Iapetus, which is in synchronous rotation, is covered by an optically dark material mainly on its leading side, while its trailing side is significantly brighter. Bec…

astro-ph.EP2019★ 40 cited

Transmission Spectroscopy of WASP-79b from 0.6 to 5.0 m

Kristin S. Sotzen, Kevin B. Stevenson, David K. Sing +18

As part of the PanCET 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…

astro-ph.EP2019★ 55 cited

WASP-127b transmission spectrum]{Abundance measurements of HO and carbon-bearing species in the atmosphere of WASP-127b confirm its super-solar metallicity

Jessica J. Spake, David K. Sing, Hannah R. Wakeford +14

The chemical abundances of exoplanet atmospheres may provide valuable information about the bulk compositions, formation pathways, and evolutionary histories of planets. Exoplanets…

astro-ph.EP2019★ 18 cited

HD 117214 debris disk: scattered-light images and constraints on the presence of planets

N. Engler, C. Lazzoni, R. Gratton +34

We performed observations of the Sco-Cen F star HD 117214 aiming at a search for planetary companions and the characterization of the debris disk structure. HD 117214 was observed…

astro-ph.EP2019★ 32 cited

Kojima-1Lb Is a Mildly Cold Neptune around the Brightest Microlensing Host Star

A. Fukui, D. Suzuki, N. Koshimoto +56

We report the analysis of additional multiband photometry and spectroscopy and new adaptive optics (AO) imaging of the nearby planetary microlensing event TCP J05074264+2447555 (Ko…

astro-ph.EP2019★ 14 cited

From the stellar properties of HD219134 to the internal compositions of its transiting exoplanets

Roxanne Ligi, Caroline Dorn, Aurélien Crida +8

The harvest of exoplanet discoveries has opened the area of exoplanet characterisation. But this cannot be achieved without a careful analysis of the host star parameters. The syst…

astro-ph.EP2019★ 43 cited

Seasonal changes in the middle atmosphere of Titan from Cassini/CIRS observations: temperature and trace species abundance profiles from 2004 to 2017

Christophe Mathé, Sandrine Vinatier, Bruno Bézard +6

The Cassini/Composite InfraRed Spectrometer (CIRS) instrument has been observing the middle atmosphere of Titan over almost half a Saturnian year. We used the CIRS dataset processe…

astro-ph.EP2019★ 9 cited

The first observed stellar occultations by the irregular satellite (Saturn IX) Phoebe and improved rotational period

A. R. Gomes-Júnior, M. Assafin, F. Braga-Ribas +24

We report six stellar occultations by (Saturn IX) Phoebe, an irregular satellite of Saturn, obtained between mid-2017 and mid-2019. The 2017 July 06 event is the first stellar occu…