First millimeter detection of the disk around a young, isolated, planetary-mass object

OTS44 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 (\(\sim\)12 M\(_{\rm Jup}\)) with a substantial disk that is actively accreting. We have obtained Band 6 (233 GHz) ALMA continuum data of...

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Veröffentlicht in:arXiv.org 2017-05
Hauptverfasser: Bayo, Amelia, Joergens, Viki, Liu, Yao, Brauer, Robert, Olofsson, Johan, Arancibia, Javier, Pinilla, Paola, Wolf, Sebastian, Ruge, Jan Philipp, Henning, Thomas, Natta, Antonella, Johnston, Katharine G, Bonnefoy, Mickael, Beuther, Henrik, Chauvin, Gael
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Sprache:eng
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Zusammenfassung:OTS44 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 (\(\sim\)12 M\(_{\rm Jup}\)) 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 shows 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\(_{\oplus}\) (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 \(M_{\rm dust}\) and \(M_{*}\) through the substellar domain down to planetary masses.
ISSN:2331-8422
DOI:10.48550/arxiv.1705.06378