Article (Scientific journals)
Spirals, shadows, and precession in HD 100453 - I. The orbit of the binary
Gonzalez, Jean-François; van der Plas, Gerrit; Pinte, Christophe et al.
2020In Monthly Notices of the Royal Astronomical Society, 499, p. 3837
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Keywords :
hydrodynamics; radiative transfer; methods: numerical; protoplanetary discs; stars: individual: HD 100453; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Astrophysics of Galaxies; Astrophysics - Solar and Stellar Astrophysics
Abstract :
[en] In recent years, several protoplanetary discs have been observed to exhibit spirals, both in scattered light and (sub)millimetre continuum data. The HD 100453 binary star system hosts such a disc around its primary. Previous work has argued that the spirals were caused by the gravitational interaction of the secondary, which was assumed to be on a circular orbit, coplanar with the disc (meaning here the large outer disc, as opposed to the very small inner disc). However, recent observations of the CO gas emission were found incompatible with this assumption. In this paper, we run SPH simulations of the gas and dust disc for seven orbital configurations taken from astrometric fits and compute synthetic observations from their results. Comparing to high-resolution ALMA [SUP]12[/SUP]CO data, we find that the best agreement is obtained for an orbit with eccentricity e = 0.32 and semimajor axis a = 207 au, inclined by 61° relative to the disc plane. The large misalignment between the disc and orbit planes is compatible with the tidal evolution of a circumprimary disc in an eccentric, unequal-mass binary star.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gonzalez, Jean-François;  Univ Lyon, Univ Claude Bernard Lyon 1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, F-69230 Saint-Genis-Laval, France
van der Plas, Gerrit;  Univ. Grenoble Alpes, CNRS, IPAG (UMR 5274), F-38000 Grenoble, France
Pinte, Christophe;  Univ. Grenoble Alpes, CNRS, IPAG (UMR 5274), F-38000 Grenoble, France
Cuello, Nicolás;  Univ. Grenoble Alpes, CNRS, IPAG (UMR 5274), F-38000 Grenoble, France
Nealon, Rebecca;  School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
Ménard, François;  Univ. Grenoble Alpes, CNRS, IPAG (UMR 5274), F-38000 Grenoble, France
Revol, Alexandre;  Univ Lyon, Univ Claude Bernard Lyon 1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, F-69230 Saint-Genis-Laval, France
Rodet, Laetitia;  Cornell Center for Astrophysics and Planetary Science, Department of Astronomy, Cornell University, Ithaca, NY 14853, USA
Langlois, Maud;  Univ Lyon, Univ Claude Bernard Lyon 1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, F-69230 Saint-Genis-Laval, France
Maire, Anne-Lise ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > PSILab
Language :
English
Title :
Spirals, shadows, and precession in HD 100453 - I. The orbit of the binary
Publication date :
01 September 2020
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Oxford University Press, Oxford, United Kingdom
Volume :
499
Pages :
3837
Peer reviewed :
Peer Reviewed verified by ORBi
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