VVV-WIT-01: Highly obscured classical nova or protostellar collision?

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dc.contributor.authorLucas, P.
dc.contributor.authorMinniti, D.
dc.contributor.authorKamble, A.
dc.contributor.authorKaplan, D.
dc.contributor.authorCross, N.
dc.contributor.authorDekany, I.
dc.contributor.authorIvanov, V.
dc.contributor.authorKurtev, R.
dc.contributor.authorSaito, R.
dc.contributor.authorSmith, L.
dc.contributor.authorCatelan, M.
dc.contributor.authorMasetti, N.
dc.date.accessioned2021-07-15T18:36:46Z
dc.date.available2021-07-15T18:36:46Z
dc.date.issued2020-01
dc.descriptionIndexación: Scopus.es
dc.description.abstractA search of the first Data Release of the VISTA Variables in the Via Lactea (VVV) Survey discovered the exceptionally red transient VVV-WIT-01 (H - Ks = 5.2). It peaked before March 2010, then faded by ∼9.5 mag over the following 2 yr. The 1.6-22 μm spectral energy distribution in March 2010 was well fit by a highly obscured blackbody with T ∼ 1000 K and AKs ∼ 6.6 mag. The source is projected against the Infrared Dark Cloud (IRDC) SDC G331.062-0.294. The chance projection probability is small for any single event (p ≈ 0.01-0.02), which suggests a physical association, e.g. a collision between low mass protostars. However, blackbody emission at T ∼ 1000 K is common in classical novae (especially CO novae) at the infrared peak in the light curve due to condensation of dust ∼30-60 d after the explosion. Radio follow-up with the Australia Telescope Compact Array detected a fading continuum source with properties consistent with a classical nova but probably inconsistent with colliding protostars. Considering all VVV transients that could have been projected against a catalogued IRDC raises the probability of a chance association to p = 0.13-0.24. After weighing several options, it appears likely that VVV-WIT-01 was a classical nova event located behind an IRDC.es
dc.description.urihttps://academic.oup.com/mnras/article/492/4/4847/5709937
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Volume 492, Issue 4, Pages 4847 - 4857, 2020es
dc.identifier.doiDOI: 10.1093/MNRAS/STAA155
dc.identifier.issn0035-8711
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/19404
dc.language.isoenes
dc.publisherRoyal Astronomical Society [Associate Organisation] Oxford University Press [Commercial Publisher]es
dc.subjectInfrared: starses
dc.subjectISM: cloudses
dc.subjectNovaees
dc.subjectcataclysmic variableses
dc.subjectStars: formationes
dc.titleVVV-WIT-01: Highly obscured classical nova or protostellar collision?es
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