Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/34417
DC Field | Value | Language |
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dc.contributor.author | Faherty, Jacqueline K. | en_US |
dc.contributor.author | Gagné, Jonathan | en_US |
dc.contributor.author | Popinchalk, Mark | en_US |
dc.contributor.author | Vos, Johanna M. | en_US |
dc.contributor.author | Burgasser, Adam J. | en_US |
dc.contributor.author | Schümann, Jörg | en_US |
dc.contributor.author | Schneider, Adam C. | en_US |
dc.contributor.author | Kirkpatrick, J. Davy | en_US |
dc.contributor.author | Meisner, Aaron M. | en_US |
dc.contributor.author | Kuchner, Marc J. | en_US |
dc.contributor.author | Bardalez Gagliuffi, Daniella C. | en_US |
dc.contributor.author | Marocco, Federico | en_US |
dc.contributor.author | Caselden, Dan | en_US |
dc.contributor.author | Gonzales, Eileen C. | en_US |
dc.contributor.author | Rothermich, Austin | en_US |
dc.contributor.author | Casewell, Sarah L. | en_US |
dc.contributor.author | Debes, John H. | en_US |
dc.contributor.author | Aganze, Christian | en_US |
dc.contributor.author | Ayala, Andrew | en_US |
dc.contributor.author | Hsu, Chih-Chun | en_US |
dc.contributor.author | Cooper, William J. | en_US |
dc.contributor.author | SMART, Richard Laurence | en_US |
dc.contributor.author | Gerasimov, Roman | en_US |
dc.contributor.author | Theissen, Christopher A. | en_US |
dc.contributor.author | Backyard Worlds: Planet 9 Collaboration | en_US |
dc.date.accessioned | 2023-10-02T14:20:36Z | - |
dc.date.available | 2023-10-02T14:20:36Z | - |
dc.date.issued | 2021 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/34417 | - |
dc.description.abstract | Through the Backyard Worlds: Planet 9 citizen science project we discovered a late-type L dwarf co-moving with the young K0 star BD+60 1417 at a projected separation of 37″ or 1662 au. The secondary-CWISER J124332.12+600126.2 (W1243)-is detected in both the CatWISE2020 and 2MASS reject tables. The photometric distance and CatWISE proper motion both match that of the primary within ~1σ and our estimates for a chance alignment yield a zero probability. Follow-up near-infrared spectroscopy reveals W1243 to be a very red 2MASS (J-K <SUB> s </SUB> = 2.72), low surface gravity source that we classify as L6-L8γ. Its spectral morphology strongly resembles that of confirmed late-type L dwarfs in 10-150 Myr moving groups as well as that of planetary mass companions. The position on near- and mid-infrared color-magnitude diagrams indicates the source is redder and fainter than the field sequence, a telltale sign of an object with thick clouds and a complex atmosphere. For the primary we obtained new optical spectroscopy and analyzed all available literature information for youth indicators. We conclude that the Li I abundance, its loci on color-magnitude and color-color diagrams, and the rotation rate revealed in multiple TESS sectors are all consistent with an age of 50-150 Myr. Using our re-evaluated age of the primary and the Gaia parallax, along with the photometry and spectrum for W1243, we find T <SUB>eff</SUB> = 1303 ± 31 K, log g = 4.3 ± 0.17 cm s<SUP>-2</SUP>, and a mass of 15 ± 5 M <SUB>Jup</SUB>. We find a physical separation of ~1662 au and a mass ratio of ~0.01 for this system. Placing it in the context of the diverse collection of binary stars, brown dwarfs, and planetary companions, the BD+60 1417 system falls in a sparsely sampled area where the formation pathway is difficult to assess. | en_US |
dc.language.iso | eng | en_US |
dc.title | A Wide Planetary Mass Companion Discovered through the Citizen Science Project Backyard Worlds: Planet 9 | en_US |
dc.identifier.doi | 10.3847/1538-4357/ac2499 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/ac2499 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 923 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 48 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | GBR | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.identifier.adsbibcode | 2021ApJ...923...48F | en_US |
dc.description.apc | sì | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.orcid | 0000-0002-4424-4766 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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Faherty_2021_ApJ_923_48.pdf | Pdf editoriale | 2.14 MB | Adobe PDF | View/Open |
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