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 <SUP>12</SUP>CO 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 ≳ 5M<SUB>Jup</SUB>, or a lower mass ( ≳ 2M<SUB>Jup</SUB>) 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
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