ALMA Observations of the Young Substellar Binary System 2M1207

Abstract

We present ALMA observations of the 2M1207 system, a young binary made of a brown dwarf with a planetary-mass companion at a projected separation of about 40 au. We detect emission from dust continuum at 0.89 mm and from the $J=3-2$ rotational transition of CO from a very compact disk around the young brown dwarf. The small radius found for this brown dwarf disk may be due to truncation from the tidal interaction with the planetary-mass companion. Under the assumption of optically thin dust emission, we estimated a dust mass of 0.1 $M_{\oplus }$ for the 2M1207A disk, and a 3$\sigma$ upper limit of $\sim 1M_{\mathrm{Moon}}$ for dust surrounding 2M1207b, which is the tightest upper limit obtained so far for the mass of dust particles surrounding a young planetary-mass companion. We discuss the impact of this and other non-detections of young planetary-mass companions for models of planet formation, which predict the presence of circum-planetary material surrounding these objects.

10 pages, 6 figures, accepted for publication in AJ

References in corpus (20)

• A Steeper than Linear Disk Mass-Stellar Mass Scaling Relation
• A Theoretical Interpretation of the Black Hole Fundamental Plane
• The Planetary Mass Companion 2MASS1207-3932 B: Temperature, Mass and Evidence for an Edge-On Disk
• The potential for Earth-mass planet formation around brown dwarfs
• Brown dwarf disks with ALMA: evidence for truncated dust disks in Ophiuchus
• Searching for circumplanetary disks around LkCa 15
• Measuring tiny mass accretion rates onto young brown dwarfs
• Brown dwarf disks with ALMA
• A Resolved Molecular Gas Disk around the Nearby A Star 49 Ceti
• Discovery of a Bipolar Outflow from 2MASSW J1207334-393254, A 24 Jupiter Mass Brown Dwarf
• The properties of discs around planets and brown dwarfs as evidence for disc fragmentation
• An accurate distance to 2M1207Ab
• Circumplanetary disks around young giant planets: a comparison between core-accretion and disk instability
• An ALMA Disk Mass for the Candidate Protoplanetary Companion to FW Tau
• The Trigonometric Parallax of the Brown Dwarf Planetary System 2MASSW J1207334-393254
• ALMA Measurements of Circumstellar Material in the GQ Lup System
• The First Direct Distance and Luminosity Determination for a Self-Luminous Giant Exoplanet: The Trigonometric Parallax to 2MASS1207334-393254Ab
• Shock-driven Accretion in Circumplanetary Disks: Observables and Satellite Formation
• An ALMA Constraint on the GSC 6214-210 B Circum-Substellar Accretion Disk Mass
• First millimeter detection of the disk around a young, isolated, planetary-mass object

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