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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 719954.0, MPI für Astronomie / Publikationen_mpia
The VLA Nascent Disk and Multiplicity (VANDAM) Survey of Perseus protostars. Resolving the sub-arcsecond binary system in NGC 1333 IRAS2A
Authors:Tobin, J. J.; Dunham, M. M.; Looney, L. W.; Li, Z.-Y.; Chandler, C. J.; Segura-Cox, D.; Sadavoy, S. I.; Melis, C.; Harris, R. J.; Perez, L. M.; Kratter, K.; Jørgensen, J. K.; Plunkett, A. L.; Hull, C. L. H.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:The Astrophysical Journal
Issue / Number:1
Start Page:id. 61 (13 pp)
Audience:Not Specified
Abstract / Description:We are conducting a Jansky Very Large Array (VLA) Ka-band (8 mm and 1 cm) and C-band (4 cm and 6.4 cm) survey of all known protostars in the Perseus Molecular Cloud, providing resolution down to ~0.''06 and ~0.''35 in the Ka band and C band, respectively. Here we present first results from this survey that enable us to examine the source NGC 1333 IRAS2A in unprecedented detail and resolve it into a protobinary system separated by 0.''621 ± 0.''006 (~143 AU) at 8 mm, 1 cm, and 4 cm. These two sources (IRAS2A VLA1 and VLA2) are likely driving the two orthogonal outflows known to originate from IRAS2A. The brighter source IRAS2A VLA1 is extended perpendicular to its outflow in the VLA data, with a deconvolved size of 0.''055 (~13 AU), possibly tracing a protostellar disk. The recently reported candidate companions (IRAS2A MM2 and MM3) are not detected in either our VLA data, Combined Array for Research in Millimeter-wave Astronomy (CARMA) 1.3 mm data, or Submillimeter Array (SMA) 850 μm data. SMA CO (J = 3 → 2), CARMA
Free Keywords:binaries: general; ISM: individual objects: NGC 1333; protoplanetary disks; stars: formation; stars: protostars
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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