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Infrared spectroscopy of free-floating planet candidates in Upper Scorpius and Ophiuchus

hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBOUY, H.
dc.contributor.authorTAMURA, M.
dc.contributor.authorBARRADO, D.
dc.contributor.authorMOTOHARA, K.
dc.contributor.authorCASTRO RODRÍGUEZ, N.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorMIRET-ROIG, N.
dc.contributor.authorKONISHI, M.
dc.contributor.authorKOYAMA, S.
dc.contributor.authorTAKAHASHI, H.
dc.contributor.authorHUÉLAMO, N.
hal.structure.identifierCanada-France-Hawaii Telescope Corporation [CFHT]
dc.contributor.authorBERTIN, E.
dc.contributor.authorOLIVARES, J.
dc.contributor.authorSARRO, L. M.
dc.contributor.authorBERIHUETE, A.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorCUILLANDRE, J. -C.
dc.contributor.authorGALLI, P. A. B.
dc.contributor.authorYOSHII, Y.
dc.contributor.authorMIYATA, T.
dc.date.issued2022
dc.identifier.issn0004-6361
dc.description.abstractEnContext. A rich population of low-mass brown dwarfs and isolated planetary mass objects has been reported in the Upper Scorpius and Ophiuchus star-forming complex. <BR /> Aims: We investigate the membership, nature, and properties of 17 of these isolated planetary mass candidates using low-resolution near-infrared spectra. <BR /> Methods: We investigated the membership by looking for evidence of their youth using four diagnostics: the slope of the continuum between the J and Ks band, the H<SUB>cont</SUB>, and the TLI-g gravity-sensitive indices. In addition, we compared the spectra to young and field (old) M and L-dwarf standards. <BR /> Results: All the targets but one are confirmed as young ultracool objects, with spectral types between L0 and L6 and masses in the range 0.004-0.013 M<SUB>⊙</SUB>, according to evolutionary models. The status of the last target is unclear at this point. <BR /> Conclusions: Only one possible contaminant has been identified among the 17 targets, suggesting that the contamination level of the original sample must be low (≲6%). <P />Full Table B.4 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr/">cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/664/A111">http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/664/A111</A>
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enbrown dwarfs
dc.subject.enstars: late-type
dc.subject.enstars: pre-main sequence
dc.subject.enplanets and satellites: formation
dc.subject.enAstrophysics - Solar and Stellar Astrophysics
dc.subject.enAstrophysics - Earth and Planetary Astrophysics
dc.title.enInfrared spectroscopy of free-floating planet candidates in Upper Scorpius and Ophiuchus
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202243850
dc.subject.halPlanète et Univers [physics]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv2206.00916
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.volume664
bordeaux.peerReviewedoui
hal.identifierinsu-03846756
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//insu-03846756v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&amp;rft.date=2022&amp;rft.volume=664&amp;rft.eissn=0004-6361&amp;rft.issn=0004-6361&amp;rft.au=BOUY,%20H.&amp;TAMURA,%20M.&amp;BARRADO,%20D.&amp;MOTOHARA,%20K.&amp;CASTRO%20RODR%C3%8DGUEZ,%20N.&amp;rft.genre=article


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