Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
ALMA Resolves CI Emission from the beta Pictoris Debris Disk
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. National Astronomical Observatory of Japan, USA; Hungarian Academy of Sciences, Hungary.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi.
Vise andre og tillknytning
Rekke forfattare: 112018 (engelsk)Inngår i: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 861, nr 1, artikkel-id 72Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The debris disk around beta Pictoris is known to contain gas. Previous ALMA observations revealed a CO belt at similar to 85 au with a distinct clump, interpreted as a location of enhanced gas production. Photodissociation converts CO into C and O within similar to 50 a. We resolve C I emission at 492 GHz using ALMA and study its spatial distribution. C I shows the same clump as seen for CO. This is surprising, as C is expected to quickly spread in azimuth. We derive a low C mass (between 5 x 10(-4) and 3.1 x 10(-3) MA(circle plus)), indicating that gas production started only recently (within similar to 5000 a). No evidence is seen for an atomic accretion disk inward of the CO belt, perhaps because the gas did not yet have time to spread radially. The fact that C and CO share the same asymmetry argues against a previously proposed scenario where the clump is due to an outward-migrating planet trapping planetesimals in a resonance, nor can the observations be explained by an eccentric planetesimal belt secularly forced by a planet. Instead, we suggest that the dust and gas disks should be eccentric. Such a configuration, we further speculate, might be produced by a recent tidal disruption event. Assuming that the disrupted body has had a CO mass fraction of 10%, its total mass would be greater than or similar to 3M(Moon).

sted, utgiver, år, opplag, sider
2018. Vol. 861, nr 1, artikkel-id 72
Emneord [en]
circumstellar matter, methods: observational, radiative transfer, stars: individual (beta Pictoris), submillimeter: planetary systems, techniques: interferometric
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-158345DOI: 10.3847/1538-4357/aac5f3ISI: 000437718000007OAI: oai:DiVA.org:su-158345DiVA, id: diva2:1239035
Tilgjengelig fra: 2018-08-15 Laget: 2018-08-15 Sist oppdatert: 2022-02-26bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekst

Person

Cataldi, GianniBrandeker, AlexisOlofsson, Göran

Søk i DiVA

Av forfatter/redaktør
Cataldi, GianniBrandeker, AlexisOlofsson, Göran
Av organisasjonen
I samme tidsskrift
Astrophysical Journal

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 22 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf