MISALIGNED DISKS IN THE BINARY PROTOSTAR IRS 43

ABSTRACT Recent high angular resolution ( ) ALMA observations of the 1.1 mm continuum and of HCO+ J = 3-2 and HCN J = 3-2 gas toward the binary protostar IRS 43 reveal multiple Keplerian disks that are significantly misaligned ( ), both in inclination and position angle and also with respect to the...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2016-10, Vol.830 (1), p.L16-L16
Main Authors: Brinch, Christian, Jørgensen, Jes K., Hogerheijde, Michiel R., Nelson, Richard P., Gressel, Oliver
Format: Article
Language:English
Subjects:
Accretion disks
astrometry
Binary stars
Continuums
Disks
Inclination
Position measurement
protoplanetary disks
Protostars
stars: formation
Turbulence
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Summary:ABSTRACT Recent high angular resolution ( ) ALMA observations of the 1.1 mm continuum and of HCO+ J = 3-2 and HCN J = 3-2 gas toward the binary protostar IRS 43 reveal multiple Keplerian disks that are significantly misaligned ( ), both in inclination and position angle and also with respect to the binary orbital plane. Each stellar component has an associated circumstellar disk while the binary is surrounded by a circumbinary disk. Together with archival VLA measurements of the stellar positions over 25 years, and assuming a circular orbit, we use our continuum measurements to determine the binary separation, , and its inclination, . The misalignment in this system suggests that turbulence has likely played a major role in the formation of IRS 43.
ISSN:2041-8205
2041-8213
DOI:10.3847/2041-8205/830/1/L16