Kinematic and thermal signatures of the directly imaged protoplanet candidate around elias 2-24

planets and satellites: detection; planets and satellites: formation; protoplanetary discs; planet-disc interactions; Astrophysics - Earth and; Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics

Abstract :

[en] We report kinematic and thermal signatures associated with the directly imaged protoplanet candidate in the Elias 2-24 disc. Using the DSHARP ALMA observations of the 12CO J=2-1 line, we show that the disc kinematics are perturbed, with a detached CO emission spot at the location of the planet candidate and traces of spiral wakes, and also that the observed CO emission intensities require local heating. While the foreground extinction hides the velocity channels associated with the planet, preventing a planet mass estimate, the level of gas heating implied by the CO emission indicates the presence of a warm, embedded giant planet. Comparison with models show this could either be a ≳ 5MJup, or a lower mass ( ≳ 2MJup) but accreting proto-planet.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Pinte, C.; Monash University, School of Astrophysics, Institute de Planetologie et d'Astrophysique de Grenoble

Hammond, I.; Monash University, School of Astrophysics

Price, D. J.; Monash University, School of Astrophysics

Christiaens, Valentin ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)

Andrews, S. M.; ANU, Research School of Astronomy and Astrophysics

Chauvin, G.; Institute de Planetologie et d'Astrophysique de Grenoble, Observatoire de la Cote d'Azur, France

Pérez, L. M.; University of Chile, Department of Astronomy, Millennium Institute of Astrophysics, Chile

Jorquera, S.; University of Chile, Department of Astronomy

Garg, H.; Monash University, School of Astrophysics

Norfolk, B. J.; ANU, Research School of Astronomy and Astrophysics

Calcino, J.; Los Alamos National Laboratory, Theoretical Division

Bonnefoy, M.; Institute de Planetologie et d'Astrophysique de Grenoble

Language :

English

Title :

Kinematic and thermal signatures of the directly imaged protoplanet candidate around elias 2-24

Publication date :

01 February 2023

Journal title :

Monthly Notices of the Royal Astronomical Society

ISSN :

0035-8711

eISSN :

1365-2966

Publisher :

Oxford University Press, Oxford, Gb

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://ui.adsabs.harvard.edu/abs/2023MNRAS.tmpL..13P

Available on ORBi :

since 11 May 2023

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