Binary-induced spiral arms inside the disc cavity of AB Aurigae

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dc.contributor.authorPoblete, Pedro P.
dc.contributor.authorCalcino, Josh
dc.contributor.authorCuello, Nicolas
dc.contributor.authorMacias, Enrique
dc.contributor.authorRibas, Alvaro
dc.contributor.authorPrice, Daniel J.
dc.contributor.authorCuadra, Jorge
dc.contributor.authorPinte, Christophe
dc.date.accessioned2025-01-23T19:49:01Z
dc.date.available2025-01-23T19:49:01Z
dc.date.issued2020
dc.description.abstractIn this work we demonstrate that the inner spiral structure observed in AB Aurigae can be created by a binary star orbiting inside the dust cavity. We find that a companion with a mass-ratio of 0.25, semimajor axis of 40 au, eccentricity of 0.5, and inclination of 90 degrees produces gaseous spirals closely matching the ones observed in (CO)-C-12 (2-1) line emission. Based on dust dynamics in circumbinary discs (Poblete, Cuello & Cuadra 2019), we constrain the inclination of the binary with respect to the circumbinary disc to range between 60 degrees and 90 degrees. We predict that the stellar companion is located roughly 0.18 arcsec from the central star towards the east-southeast, above the plane of the disc. Should this companion be detected in the near future, our model indicates that it should be moving away from the primary star at a rate of 6 mas yr(-1) on the plane of the sky. Since our companion is inclined, we also predict that the spiral structure will appear to change with time, and not simply corotate with the companion.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/staa1655
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/staa1655
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100475
dc.identifier.wosidWOS:000561118000094
dc.issue.numero2
dc.language.isoen
dc.pagina.final2371
dc.pagina.inicio2362
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjecthydrodynamics
dc.subjectmethods: numerical
dc.subjectprotoplanetary discs
dc.subjectcircumstellar matter
dc.subjectstars: individual: AB Aurigae
dc.titleBinary-induced spiral arms inside the disc cavity of AB Aurigae
dc.typeartículo
dc.volumen496
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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