Andrews, S. M.
Carpenter, J. M.
Bowler, Brendan P.
AffiliationUniv Arizona, Lunar & Planetary Lab
planets and satellites: formation
stars: individual (2M1207)
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationALMA Observations of the Young Substellar Binary System 2M1207 2017, 154 (1):24 The Astronomical Journal
JournalThe Astronomical Journal
Rights© 2017. The American Astronomical Society. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractWe 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 estimate. a dust mass of 0.1 M-circle plus. for the 2M1207A disk and a 3 sigma upper limit of similar to 1 M-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 that predict circumplanetary material to surround these objects.
VersionFinal published version
SponsorsNational Aeronautics and Space Administration [15XRP15_20140]; NASA [HST-HF2-51369.001-A]; Space Telescope Science Institute [NAS5-26555]