First Millimeter Detection of the Disk around a Young, Isolated, Planetary-mass Object
Ruge, Jan Philipp
Johnston, Katharine G.
AffiliationUniv Arizona, Dept Astron, Steward Observ
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PublisherIOP PUBLISHING LTD
CitationFirst Millimeter Detection of the Disk around a Young, Isolated, Planetary-mass Object 2017, 841 (1):L11 The Astrophysical Journal
Rights© 2017. The American Astronomical Society. All rights reserved.
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AbstractOTS44 is one of only four free-floating planets known to have a disk. We have previously shown that it is the coolest and least massive known free-floating planet (similar to 12 M-Jup) with a substantial disk that is actively accreting. We have obtained Band 6 (233 GHz) ALMA continuum data of this very young disk-bearing object. The data show a clear unresolved detection of the source. We obtained disk-mass estimates via empirical correlations derived for young, higher-mass, central (substellar) objects. The range of values obtained are between 0.07 and 0.63 M-circle plus (dust masses). We compare the properties of this unique disk with those recently reported around higher-mass (brown dwarfs) young objects in order to infer constraints on its mechanism of formation. While extreme assumptions on dust temperature yield disk-mass values that could slightly diverge from the general trends found for more massive brown dwarfs, a range of sensible values provide disk masses compatible with a unique scaling relation between M-dust and M* through the substellar domain down to planetary masses.
VersionFinal published version
SponsorsProyecto Fondecyt Iniciacion ; Science Foundation Ireland [13/ERC/12907]; NSFC ; Natural Science Foundation of Jiangsu Province of China [BK20141046]; German Academic Exchange Service; China Scholarship Council; UV; European Science Council under the Horizon 2020 framework program via the ERC Consolidator grant [CSF-648505]; NASA through Hubble Fellowship - Space Telescope Science Institute [HST-HF2-51380.001-A]; NASA [NAS 5-26555]