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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| creator | 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 |
| description | 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. |
| doi_str_mv | 10.48550/arxiv.1705.06378 |
| format | Article |
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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.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1705.06378</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Accretion disks ; Brown dwarf stars ; Brown dwarfs ; Dust ; Physics - Astrophysics of Galaxies ; Physics - Earth and Planetary Astrophysics ; Physics - Solar and Stellar Astrophysics ; Planet detection ; Rogue planets ; Uniqueness</subject><ispartof>arXiv.org, 2017-05</ispartof><rights>2017. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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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. 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| subjects | Accretion disks Brown dwarf stars Brown dwarfs Dust Physics - Astrophysics of Galaxies Physics - Earth and Planetary Astrophysics Physics - Solar and Stellar Astrophysics Planet detection Rogue planets Uniqueness |
| title | First millimeter detection of the disk around a young, isolated, planetary-mass object |
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