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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 559362.0, MPI für Astronomie / Publikationen_mpia
Bipolar jets produced by a spectroscopic binary
Authors:Mundt, Reinhard; Hamilton, Catrina M.; Herbst, William; Johns-Krull, Christopher M.; Winn, Joshua N.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:The Astrophysical Journal
Journal Abbrev.:ApJ
Start Page:L5
End Page:L8
Review Status:not specified
Audience:Experts Only
Abstract / Description:We present evidence that the spectroscopically identified bipolar jets of the pre-main sequence binary KH 15D (P = 48.4 d, epsilon~ 0.6, periastron separation ~18 RA , MA = 0.6 M sun, MB = 0.7 M sun) are a common product of the whole binary system, rather than being launched from either star individually. They may be launched from the innermost part of the circumbinary disk (CBD) or may result from the merging of two outflows driven by the individual stars. This evidence is based on high-resolution Hα and [O I]λ6300 line profiles obtained during eclipse phases of this nearly edge-on system. The occultation of star A (the only currently visible star) by the disk strongly suppresses the stellar Hα and continuum emission and allows one to study the faint redshifted and blueshifted emission components of the bipolar jets. The strongest evidence for jet production by the whole binary system comes from the observed radial velocity symmetry of the two jet components relative to the systemic velocity of the binary in combination with current accretion models from the CBD onto a binary system.
Free Keywords:binaries: spectroscopic; circumstellar matter; ISM: jets and outflows; stars: individual: KH 15D; stars: pre-main sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2010ApJ...708L...5M [ID No:1]
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