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20022026
Showing 2021 · astro-ph.EPShow all

33 papers · 2 filters

astro-ph.EP2021★ 12 cited

Ground-based HCN submillimetre measurements in Titan's atmosphere: an intercomparison with Herschel observations

M. Rengel, D. Shulyak, P. Hartogh +4

The aim of this study is to measure the vertical distribution of HCN on Titan's stratosphere using ground-based submm observations acquired quasi-simultaneously with the Herschel o…

astro-ph.EP2021

K2-99 revisited: a non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant

A. M. S. Smith, S. N. Breton, Sz. Csizmadia +29

We report new photometric and spectroscopic observations of the K2-99 planetary system. Asteroseismic analysis of the short-cadence light curve from K2's Campaign 17 allows us to r…

astro-ph.EP2021★ 9 cited

An extended scattered light disk around AT Pyx -- Possible planet formation in a cometary globule

C. Ginski, R. Gratton, A. Bohn +35

To understand how the multitude of planetary systems that have been discovered come to be, we need to study systems at different evolutionary stages, with different central stars b…

astro-ph.EP2021★ 8 cited

Narrow belt of debris around the Sco-Cen star HD 141011

M. Bonnefoy, J. Milli, F. Menard +22

We initiated a deep-imaging survey of Scorpius-Centaurus A-F stars with predicted warm inner and cold outer belts of debris reminiscent of the architecture of emblematic systems su…

astro-ph.EP2021★ 21 cited

Signs of late infall and possible planet formation around DR Tau using VLT/SPHERE and LBTI/LMIRCam

D. Mesa, C. Ginski, R. Gratton +31

Context. Protoplanetary disks around young stars often contain substructures like rings, gaps, and spirals that could be caused by interactions between the disk and forming planets…

astro-ph.EP2021★ 24 cited

Carbon monoxide gas produced by a giant impact in the inner region of a young system

Tajana Schneiderman, Luca Matrà, Alan P. Jackson +7

Models of terrestrial planet formation predict that the final stages of planetary assembly, lasting tens of millions of years beyond the dispersal of young protoplanetary disks, ar…

astro-ph.EP2021★ 14 cited

Volatile transport modeling on Triton with new observational constraints

T. Bertrand, E. Lellouch, B. J. Holler +18

Neptune's moon Triton shares many similarities with Pluto, including volatile cycles of N2, CH4 and CO, and represents a benchmark case for the study of surface-atmosphere interact…

astro-ph.EP2021★ 68 cited

The PLATO field selection process I. Identification and content of the long-pointing fields

V. Nascimbeni, G. Piotto, A. Börner +26

PLATO (PLAnetary Transits and Oscillations of stars) is an ESA M-class satellite planned for launch by end 2026 and dedicated to the wide-field search of transiting planets around…

astro-ph.EP2021★ 14 cited

Universal protoplanetary disk size under complete non-ideal magnetohydrodynamics: The interplay between ion-neutral friction, Hall effect, and the Ohmic dissipation

Yueh-Ning Lee, Pierre Marchand, Yu-Hsuan Liu +1

The role of non-ideal magnetohydrodynamics has been proven critical during the formation of the protoplanetary disk, particularly in regulating its size. We provide a simple model…

astro-ph.EP2021★ 32 cited

37 New Validated Planets in Overlapping K2 Campaigns

J. P. de Leon, J. Livingston, M. Endl +24

We analysed 68 candidate planetary systems first identified during Campaigns 5 and 6 (C5 and C6) of the NASA \textit{K2} mission. We set out to validate these systems by using a su…

astro-ph.EP2021★ 77 cited

The all-sky PLATO input catalogue

M. Montalto, G. Piotto, P. M. Marrese +29

Context. The ESA PLAnetary Transits and Oscillations of stars (PLATO) mission will search for terrestrial planets in the habitable zone of solar-type stars. Because of telemetry li…

astro-ph.EP2021★ 12 cited

First MATISSE L-band observations of HD 179218. Is the inner 10 au region rich in carbon dust particles?

E. Kokoulina, A. Matter, B. Lopez +58

Carbon is one of the most abundant components in the Universe. While silicates have been the main focus of solid phase studies in protoplanetary discs (PPDs), little is known about…

astro-ph.EP2021

Asteroseismology of iota Draconis and Discovery of an Additional Long-Period Companion

Michelle L. Hill, Stephen R. Kane, Tiago L. Campante +25

Giant stars as known exoplanet hosts are relatively rare due to the potential challenges in acquiring precision radial velocities and the small predicted transit depths. However, t…

astro-ph.EP2021★ 46 cited

Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020

B. E. Morgado, B. Sicardy, F. Braga-Ribas +78

The Centaur (10199) Chariklo has the first rings system discovered around a small object. It was first observed using stellar occultation in 2013. Stellar occultations allow the de…

astro-ph.EP2021★ 17 cited

Investigating point sources in MWC 758 with SPHERE

A. Boccaletti, E. Pantin, F. Ménard +26

Context. Spiral arms in protoplanetary disks could be shown to be the manifestation of density waves launched by protoplanets and propagating in the gaseous component of the disk.…

astro-ph.EP2021★ 14 cited

Mapping the zonal winds of Jupiter's stratospheric equatorial oscillation

B. Benmahi, T. Cavalié, T. K. Greathouse +5

Since the 1950s, quasi-periodic oscillations have been studied in the terrestrial equatorial stratosphere. Other planets of the solar system present (or are expected to present) su…

astro-ph.EP2021★ 15 cited

Revealing asymmetrical dust distribution in the inner regions of HD 141569

Garima Singh, Trisha Bhowmik, Anthony Boccaletti +42

We obtained polarimetric differential imaging of a gas-rich debris disk around HD 141569A with SPHERE in the H-band to compare the scattering properties of the innermost ring at 44…

astro-ph.EP2021

The formation of planetary systems with SPICA

I. Kamp, M. Honda, H. Nomura +38

In this era of spatially resolved observations of planet forming disks with ALMA and large ground-based telescopes such as the VLT, Keck and Subaru, we still lack statistically rel…

astro-ph.EP2021★ 37 cited

High resolution ALMA and HST images of q Eri: an asymmetric debris disc with an eccentric Jupiter

J. B. Lovell, S. Marino, M. C. Wyatt +10

We present \textit{ALMA} 1.3 mm and 0.86 mm observations of the nearby (17.34 pc) F9V star q1 Eri (HD 10647, HR 506). This system, with age Gyr, hosts a au ra…

astro-ph.EP2021

Survival of exomoons around exoplanets

V. Dobos, S. Charnoz, A. Pál +2

Despite numerous attempts, no exomoon has firmly been confirmed to date. New missions like CHEOPS aim to characterize previously detected exoplanets, and potentially to discover ex…

astro-ph.EP2021★ 12 cited

Constraints on the nearby exoplanet Ind Ab from deep near/mid-infrared imaging limits

Gayathri Viswanath, Markus Janson, Carl-Henrik Dahlqvist +16

The past decade has seen increasing efforts in detecting and characterising exoplanets by high contrast imaging in the near/mid-infrared, which is the optimal wavelength domain for…

astro-ph.EP2021★ 29 cited

High contrast imaging at 10 microns, a search for exoplanets around: Eps Indi A, Eps Eri, Tau Ceti, Sirius A and Sirius B

P. Pathak, D. J. M. Petit dit de la Roche, M. Kasper +15

The direct imaging of rocky exoplanets is one of the major science goals for upcoming large telescopes. The contrast requirement for imaging such planets is challenging. However, t…

astro-ph.EP2021★ 16 cited

A molecular wind blows out of the Kuiper belt

Quentin Kral, J. E. Pringle, Aurélie Guilbert-Lepoutre +9

Gas has been detected in many exoplanetary systems (10 Myr), thought to be released in the destruction of volatile-rich planetesimals orbiting in exo-Kuiper belts. In this lette…

astro-ph.EP2021★ 38 cited

First direct measurement of auroral and equatorial jets in the stratosphere of Jupiter

T. Cavalié, B. Benmahi, V. Hue +11

Context. The tropospheric wind pattern in Jupiter consists of alternating prograde and retrograde zonal jets with typical velocities of up to 100 m/s around the equator. At much hi…