An ALMA Dynamical Mass Estimate of the Proposed Planetary-mass Companion FW Tau C
AffiliationUniv Arizona, Steward Observ
Keywordsaccretion, accretion disks
planets and satellites: individual (FW Tau C)
stars: individual (FW Tau)
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationAn ALMA Dynamical Mass Estimate of the Proposed Planetary-mass Companion FW Tau C 2017, 846 (2):L26 The Astrophysical Journal
Rights© 2017. The American Astronomical Society. All rights reserved.
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AbstractDynamical mass estimates down to the planet-mass regime can help to understand planet formation. We present Atacama Large Millimeter/submillimeter Array (ALMA) 1.3 mm observations of FW Tau C, a proposed similar to 10M(Jup) planet-mass companion at similar to 330 au from the host binary FW Tau AB. We spatially and spectrally resolve the accretion disk of FWTau C in (CO)-C-12 (2-1). By modeling the Keplerian rotation of gas, we derive a dynamical mass of similar to 0.1 M-circle dot. Therefore, FW Tau C is unlikely a planet, but rather a low-mass star with a highly inclined disk. This also suggests that FW Tau is a triple system consisting of three similar to 0.1. M-circle dot stars.
VersionFinal published version
SponsorsNASA Origins of Solar Systems award; TRIF fellowship