Magnetic field, magnetospheric accretion, and candidate planet of the young star GM Aurigae observed with SPIRou

Página do item simplificado
dc.creatorBonnie Romano Zaire
dc.creatorJean-Francois Donati
dc.creatorSilvia Helena Paixão Alencar
dc.creatorJerome Bouvier
dc.creatorClaire Moutou
dc.creatorStefano Bellotti
dc.creatorAndres Carmona
dc.creatorPascal Petit
dc.creatorÁgnes Kóspál
dc.creatorHsien Shang
dc.creatorEvelyne Alecian
dc.creatorCarlo Felice Manara
dc.creatorScott Gregory
dc.creatorPascal Fouqué
dc.date.accessioned2026-01-06T20:57:12Z
dc.date.issued2024-08-13
dc.identifier.doihttps://doi.org/10.1093/mnras/stae1955
dc.identifier.issn1365-2966
dc.identifier.urihttps://hdl.handle.net/1843/1292
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofMonthly notices of the royal astronomical society
dc.rightsAcesso aberto
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAstronomia estelar
dc.subject.otherTechniques: polarimetric
dc.subject.otherPlanets and satellites: detection
dc.subject.otherStars: formation
dc.subject.otherStars: magnetic field
dc.subject.otherStars: variables: T Tauri
dc.subject.otherHerbig Ae/Be
dc.subject.otherStars: individual: GM Aur
dc.titleMagnetic field, magnetospheric accretion, and candidate planet of the young star GM Aurigae observed with SPIRou
dc.typeArtigo de periódico
local.citation.epage2915
local.citation.issue3
local.citation.spage2893
local.citation.volume533
local.description.resumoThis paper analyses spectropolarimetric observations of the classical T Tauri star (CTTS) GM Aurigae collected with SPIRou, the near-infrared spectropolarimeter at the Canada–France–Hawaii Telescope, as part of the SLS and SPICE Large Programs. We report for the first time results on the large-scale magnetic field at the surface of GM Aur using Zeeman Doppler imaging. Its large-scale magnetic field energy is almost entirely stored in an axisymmetric poloidal field, which places GM Aur close to other CTTSs with similar internal structures. A dipole of about 730 G dominates the large-scale field topology, while higher order harmonics account for less than 30 per cent of the total magnetic energy. Overall, we find that the main difference between our three reconstructed maps (corresponding to sequential epochs) comes from the evolving tilt of the magnetic dipole, likely generated by non-stationary dynamo processes operating in this largely convective star rotating with a period of about 6 d. Finally, we report a 5.5σ detection of a signal in the activity-filtered radial velocity data of semi-amplitude 110 ± 20 m s−1 at a period of 8.745 ± 0.009 d. If attributed to a close-in planet in the inner accretion disc of GM Aur, it would imply that this planet candidate has a minimum mass of 1.10 ± 0.30 MJup and orbits at a distance of 0.082 ± 0.002 au.
local.publisher.countryBrasil
local.publisher.departmentICEX - INSTITUTO DE CIÊNCIAS EXATAS
local.publisher.initialsUFMG
local.subject.cnpqCIENCIAS EXATAS E DA TERRA::ASTRONOMIA
local.url.externahttps://academic.oup.com/mnras/article/533/3/2893/7733099

Arquivos

Pacote original

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Magnetic field, magnetospheric accretion, and candidate planet of the young star GM Aurigae observed with SPIRou.pdf
Tamanho:
4.35 MB
Formato:
Adobe Portable Document Format
Baixar

Licença do pacote

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
license.txt
Tamanho:
2.07 KB
Formato:
Item-specific license agreed to upon submission
Descrição:
Baixar

Coleções

Artigo de Periódico

Logo UFMG