Gas flow and accretion via spiral streamers and circumstellar disks in a young binary protostar

The majority of stars are part of gravitationally bound stellar systems, such as binaries. Observations of protobinary systems constrain the conditions that lead to stellar multiplicity and subsequent orbital evolution. We report high-angular resolution observations of the circumbinary disk around [...

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Published inScience (American Association for the Advancement of Science) Vol. 366; no. 6461; pp. 90 - 93
Main Authors Alves, F O, Caselli, P, Girart, J M, Segura-Cox, D, Franco, G A P, Schmiedeke, A, Zhao, B
Format Journal Article
LanguageEnglish
Published United States The American Association for the Advancement of Science 04.10.2019
Subjects
Accretion
Accretion disks
Angular resolution
Binary stars
Celestial bodies
Cosmic dust
Embedded systems
Filaments
Gas flow
Orbital mechanics
Protostars
Radio jets (astronomy)
Star formation
Stellar evolution
Stellar systems
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Summary:The majority of stars are part of gravitationally bound stellar systems, such as binaries. Observations of protobinary systems constrain the conditions that lead to stellar multiplicity and subsequent orbital evolution. We report high-angular resolution observations of the circumbinary disk around [BHB2007] 11, a young binary protostar system. The two protostars are embedded in circumstellar disks that have radii of 2 to 3 astronomical units and probably contain a few Jupiter masses. These systems are surrounded by a complex structure of filaments connecting to the larger circumbinary disk. We also observe accretion and radio jets associated with the protobinary system. The accretion is preferentially onto the lower-mass protostar, consistent with theoretical predictions.
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content type line 23
ISSN:0036-8075
1095-9203
DOI:10.1126/science.aaw3491