Sub-millimetre non-contaminated detection of the disc around TWA 7 by ALMA

Simple item page
dc.catalogadorvzp
dc.contributor.authorBeamin Muhlenbrock, Juan Carlos
dc.contributor.authorBayo, A.
dc.contributor.authorOlofsson, J.
dc.contributor.authorMatrà, L.
dc.contributor.authorGallardo, J.
dc.contributor.authorde Gregorio-Monsalvo, I.
dc.contributor.authorBooth, M.
dc.contributor.authorZamora, C.
dc.contributor.authorIglesias, D.
dc.contributor.authorHenning. Th
dc.contributor.authorSchreiber, M.R.
dc.contributor.authorCáceres, C.
dc.date.accessioned2024-03-14T18:34:32Z
dc.date.available2024-03-14T18:34:32Z
dc.date.issued2019
dc.description.abstractDebris discs can be seen as the leftovers of giant planet formation and the possible nurseries of rocky planets. While M-type stars outnumber more massive stars we know very little about the time evolution of their circumstellar discs at ages older than ∼10 Myr. Sub-millimetre observations are best to provide first order estimates of the available mass reservoir and thus better constrain the evolution of such discs. Here, we present ALMA Cycle 3 Band 7 observations of the debris disc around the M2 star TWA 7, which had been postulated to harbour two spatially separated dust belts, based on unresolved far-infrared and sub-millimetre data. We show that most of the emission at wavelengths longer than ∼300 μm is in fact arising from a contaminant source, most likely a sub-mm galaxy, located at about 6.6 arcsec east of TWA 7 (in 2016). Fortunately, the high resolution of our ALMA data allows us to disentangle the contaminant emission from that of the disc and report a significant detection of the disc in the sub-millimetre for the first time with a flux density of 2.1 ± 0.4 mJy at 870 um. With this detection, we show that the spectral energy distribution can be reproduced with a single dust belt.
dc.fuente.origenORCID
dc.identifier.doi10.1093/mnras/stz1133
dc.identifier.eissn1365-2966
dc.identifier.issn0335-8711
dc.identifier.urihttp://dx.doi.org/10.1093/mnras/stz1133
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/84430
dc.information.autorucInstituto de Física; Beamin Muhlenbrock, Juan Carlos; 0000-0002-8409-6534; 154617
dc.issue.numero4
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final5557
dc.pagina.inicio5552
dc.revistaMonthly Notices of the Royal Astronomical Society
dc.rightsacceso restringido
dc.subjectStellar matter
dc.subjectStars: individual: TWA 7
dc.subjectStars: low-mass
dc.subject.ddc520
dc.subject.deweyAstronomía
dc.titleSub-millimetre non-contaminated detection of the disc around TWA 7 by ALMA
dc.typeartículo
dc.volumen486
sipa.codpersvinculados154617
sipa.trazabilidadORCID;2024-03-11
Files
Collections
Artículos de revistas