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19932026
Showing 2019 · astro-ph.EPShow all

82 papers · 2 filters

astro-ph.EP2019★ 52 cited

Mass constraints for 15 protoplanetary disks from HD 1-0

M. Kama, L. Trapman, D. Fedele +6

Hydrogen deuteride (HD) rotational line emission can provide reliable protoplanetary disk gas mass measurements, but it is difficult to observe and detections have been limited to…

astro-ph.EP2019★ 15 cited

Type II migration strikes back -- An old paradigm for planet migration in discs

Chiara E. Scardoni, Giovanni P. Rosotti, Giuseppe Lodato +1

In this paper we analyse giant gap-opening planet migration in protoplanetary discs, focusing on the type II migration regime. According to standard type II theory, planets migrate…

astro-ph.EP2019★ 29 cited

Effects of photoevaporation on protoplanetary disc `isochrones'

Alice Somigliana, Claudia Toci, Giuseppe Lodato +2

Protoplanetary discs are the site of star and planet formation, and their evolution and consequent dispersal deeply affect the formation of planetary systems. In the standard scena…

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★ 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★ 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★ 75 cited

Wind of Change: retrieving exoplanet atmospheric winds from high-resolution spectroscopy

J. V. Seidel, D. Ehrenreich, L. Pino +5

Context. The atmosphere of exoplanets has been studied extensively in recent years, using numerical models to retrieve chemical composition, dynamical circulation or temperature fr…

astro-ph.EP2019★ 136 cited

MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4-5 m. I. Photometric analysis of Pic b, HIP 65426 b, PZ Tel B and HD 206893 B

Tomas Stolker, Sascha P. Quanz, Kamen O. Todorov +6

Directly imaged planets and substellar companions are key targets for the characterization of self-luminous atmospheres. Their photometric appearance at 4-5 m is sensitive to th…

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★ 83 cited

Disks Around T Tauri Stars with SPHERE (DARTTS-S) II: Twenty-one new polarimetric images of young stellar disks

Antonio Garufi, Henning Avenhaus, Sebastian Perez +8

Near-IR polarimetric images of protoplanetary disks enable us to characterize substructures that might be due to the interaction with (forming) planets. The available census is str…

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★ 64 cited

Jupiter formed as a pebble pile around the N ice line

Arthur D. Bosman, Alex J. Cridland, Yamila Miguel

The region around the HO ice line, due to its higher surface density, seems to be the ideal location to form planets. The core of Jupiter, as well as the cores of close in gas…

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★ 30 cited

TOI-132 b: A short-period planet in the Neptune desert transiting a G-type star

Matías R. Díaz, James S. Jenkins, Davide Gandolfi +45

The Neptune desert is a feature seen in the radius-mass-period plane, whereby a notable dearth of short period, Neptune-like planets is found. Here we report the {\it TESS} discove…

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★ 28 cited

Gravity-Darkening Analysis of Misaligned Hot Jupiter MASCARA-4 b

John P. Ahlers, Ethan Kruse, Knicole D. Colon +17

MASCARA-4 b is a hot Jupiter in a highly-misaligned orbit around a rapidly-rotating A3V star that was observed for 54 days by the Transiting Exoplanet Survey Satellite (\tess). We…

astro-ph.EP2019★ 88 cited

Spiral arms in the proto-planetary disc HD100453 detected with ALMA: evidence for binary-disc interaction and a vertical temperature gradient

G. P. Rosotti, M. Benisty, A. Juhász +7

Scattered light high-resolution imaging of the proto-planetary disc orbiting HD100453 shows two symmetric spiral arms, possibly launched by an external stellar companion. In this p…

astro-ph.EP2019★ 116 cited

Ionized calcium in the atmospheres of two ultra-hot exoplanets WASP-33b and KELT-9b

F. Yan, N. Casasayas-Barris, K. Molaverdikhani +25

Ultra-hot Jupiters are emerging as a new class of exoplanets. Studying their chemical compositions and temperature structures will improve the understanding of their mass loss rate…

astro-ph.EP2019★ 91 cited

Connecting planet formation and astrochemistry: A main sequence for C/O in hot-exoplanetary atmospheres

Alex J. Cridland, Ewine F. van Dishoeck, Matthew Alessi +1

To understand the role that planet formation history has on the observable atmospheric carbon-to-oxygen ratio (C/O) we have produced a population of astrochemically evolving protop…

astro-ph.EP2019★ 84 cited

VLT/SPHERE exploration of the young multiplanetary system PDS70

D. Mesa, M. Keppler, F. Cantalloube +51

Context. PDS 70 is a young (5.4 Myr), nearby (~113 pc) star hosting a known transition disk with a large gap. Recent observations with SPHERE and NACO in the near-infrared (NIR) al…

astro-ph.EP2019★ 24 cited

An updated visual orbit of the directly-imaged exoplanet 51 Eridani b and prospects for a dynamical mass measurement with Gaia

Robert J. De Rosa, Eric L. Nielsen, Jason J. Wang +52

We present a revision to the visual orbit of the young, directly-imaged exoplanet 51 Eridani b using four years of observations with the Gemini Planet Imager. The relative astromet…

astro-ph.EP2019★ 33 cited

Radiation-Hydrodynamical Models of X-ray Photoevaporation in Carbon Depleted Circumstellar Discs

Lisa Wölfer, Giovanni Picogna, Barbara Ercolano +1

The so-called transition discs provide an important tool to probe various mechanisms that might influence the evolution of protoplanetary discs and therefore the formation of plane…

astro-ph.EP2019★ 25 cited

Measuring the atomic composition of planetary building blocks

M. K. McClure, C. Dominik, M. Kama

Volatile molecules are critical to terrestrial planetary habitability, yet difficult to observe directly where planets form at the midplanes of protoplanetary disks. It is unclear…

astro-ph.EP2019★ 130 cited

A giant exoplanet orbiting a very low-mass star challenges planet formation models

J. C. Morales, A. J. Mustill, I. Ribas +179

Statistical analyses from exoplanet surveys around low-mass stars indicate that super-Earth and Neptune-mass planets are more frequent than gas giants around such stars, in agreeme…