An ALMA Dynamical Mass Estimate of the Proposed Planetary-mass Companion FW Tau C

Ya Lin Wu, Patrick D. Sheehan

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article numberL26
JournalAstrophysical Journal Letters
Volume846
Issue number2
DOIs
Publication statusPublished - 2017 Sep 10
Externally publishedYes

Keywords

  • accretion, accretion disks
  • planets and satellites: individual (FW Tau C)
  • stars: individual (FW Tau)
  • techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'An ALMA Dynamical Mass Estimate of the Proposed Planetary-mass Companion FW Tau C'. Together they form a unique fingerprint.

Cite this