TY - JOUR
T1 - An ALMA Dynamical Mass Estimate of the Proposed Planetary-mass Companion FW Tau C
AU - Wu, Ya Lin
AU - Sheehan, Patrick D.
N1 - Publisher Copyright:
© 2017. The American Astronomical Society. All rights reserved.
PY - 2017/9/10
Y1 - 2017/9/10
N2 - Dynamical 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 ∼10 MJup planet-mass companion at ∼330 au from the host binary FW Tau AB. We spatially and spectrally resolve the accretion disk of FW Tau C in 12CO (2-1). By modeling the Keplerian rotation of gas, we derive a dynamical mass of ∼0.1 M⊙. 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 ∼0.1 M⊙ stars.
AB - Dynamical 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 ∼10 MJup planet-mass companion at ∼330 au from the host binary FW Tau AB. We spatially and spectrally resolve the accretion disk of FW Tau C in 12CO (2-1). By modeling the Keplerian rotation of gas, we derive a dynamical mass of ∼0.1 M⊙. 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 ∼0.1 M⊙ stars.
KW - accretion, accretion disks
KW - planets and satellites: individual (FW Tau C)
KW - stars: individual (FW Tau)
KW - techniques: interferometric
UR - https://www.scopus.com/pages/publications/85029531475
UR - https://www.scopus.com/pages/publications/85029531475#tab=citedBy
U2 - 10.3847/2041-8213/aa8771
DO - 10.3847/2041-8213/aa8771
M3 - Article
AN - SCOPUS:85029531475
SN - 2041-8205
VL - 846
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L26
ER -