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Author (up) Ruiz-Rodriguez, D.A.; Cieza, L.A.; Casassus, S.; Almendros-Abad, V.; Jofre, P.; Muzic, K.; Ramirez, K.P.; Batalla-Falcon, G.; Dunham, M.M.; Gonzalez-Ruilova, C.; Hales, A.; Humphreys, E.; Nogueira, P.H.; Paladini, C.; Tobin, J.; Williams, J.P.; Zurlo, A.
Title Discovery of a Brown Dwarf with Quasi-spherical Mass Loss Type
Year 2022 Publication Astrophysical Journal Abbreviated Journal Astrophys. J.
Volume 938 Issue 1 Pages 54
Abstract We report the serendipitous discovery of an elliptical shell of CO associated with the faint stellar object SSTc2d J163134.1-240060 as part of the “Ophiuchus Disk Survey Employing ALMA” (ODISEA), a project aiming to study the entire population of protoplanetary disks in the Ophiuchus Molecular Cloud from 230 GHz continuum emission and (CO)-C-12 (J = 2-1), (CO)-C-13 (J = 2-1) and (CCO)-C-18 (J = 2-1) lines readable in Band 6. Remarkably, we detect a bright (CO)-C-12 elliptical shape emission of similar to 3 '' x 4 '' toward SSTc2d J163134.1-240060 without a 230 GHz continuum detection. Based on the observed near-IR spectrum taken with the Very Large Telescope (KMOS), the brightness of the source, its three-dimensional motion, and Galactic dynamic arguments, we conclude that the source is not a giant star in the distant background (>5-10 kpc) and is most likely to be a young brown dwarf in the Ophiuchus cloud, at a distance of just similar to 139 pc. This is the first report of quasi-spherical mass loss in a young brown dwarf. We suggest that the observed shell could be associated with a thermal pulse produced by the fusion of deuterium, which is not yet well understood, but for a substellar object is expected to occur during a short period of time at an age of a few Myr, in agreement with the ages of the objects in the region. Other more exotic scenarios, such as a merger with planetary companions, cannot be ruled out from the current observations.
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
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Series Volume Series Issue Edition
ISSN 0004-637X ISBN Medium
Area Expedition Conference
Notes WOS:000867382600001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1676
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