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http://hdl.handle.net/20.500.12386/29678
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Zhang, Z. H. | en_US |
dc.contributor.author | Pinfield, D. J. | en_US |
dc.contributor.author | Gálvez-Ortiz, M. C. | en_US |
dc.contributor.author | Homeier, D. | en_US |
dc.contributor.author | Burgasser, A. J. | en_US |
dc.contributor.author | Lodieu, N. | en_US |
dc.contributor.author | Martín, E. L. | en_US |
dc.contributor.author | Zapatero Osorio, M. R. | en_US |
dc.contributor.author | Allard, F. | en_US |
dc.contributor.author | Jones, H. R. A. | en_US |
dc.contributor.author | SMART, Richard Laurence | en_US |
dc.contributor.author | López Martí, B. | en_US |
dc.contributor.author | Burningham, B. | en_US |
dc.contributor.author | Rebolo, R. | en_US |
dc.date.accessioned | 2021-01-12T08:21:01Z | - |
dc.date.available | 2021-01-12T08:21:01Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29678 | - |
dc.description.abstract | We report the discovery of an esdL3 subdwarf, ULAS J020858.62+020657.0, and a usdL4.5 subdwarf, ULAS J230711.01+014447.1. They were identified as L subdwarfs by optical spectra obtained with the Gran Telescopio Canarias, and followed up by optical-to-near-infrared spectroscopy with the Very Large Telescope. We also obtained an optical-to-near-infrared spectrum of a previously known L subdwarf, ULAS J135058.85+081506.8, and reclassified it as a usdL3 subdwarf. These three objects all have typical halo kinematics. They have T<SUB>eff</SUB> around 2050-2250 K, -1.8 ≤ [Fe/H] ≤ -1.5, and mass around 0.0822-0.0833 M<SUB>☉</SUB>, according to model spectral fitting and evolutionary models. These sources are likely halo transitional brown dwarfs with unsteady hydrogen fusion, as their masses are just below the hydrogen-burning minimum mass, which is ∼ 0.0845 M<SUB>☉</SUB> at [Fe/H] = -1.6 and ∼ 0.0855 M<SUB>☉</SUB> at [Fe/H] = -1.8. Including these, there are now nine objects in the `halo brown dwarf transition zone', which is a `substellar subdwarf gap' that spans a wide temperature range within a narrow mass range of the substellar population. | en_US |
dc.language.iso | eng | en_US |
dc.title | Primeval very low-mass stars and brown dwarfs - III. The halo transitional brown dwarfs | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/sty1352 | en_US |
dc.identifier.scopus | 2-s2.0-85055343067 | en_US |
dc.identifier.isi | 000441295800100 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article-abstract/479/1/1383/5001885 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 479 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 1383 | en_US |
dc.type.referee | REF_1 | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | GBR | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | ESP | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018MNRAS.479.1383Z | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.orcid | 0000-0002-4424-4766 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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2018_Zhang_primeval3_mn.pdf | 2.79 MB | Adobe PDF | Visualizza/apri | |
sty1352.pdf | Pdf editoriale | 2.04 MB | Adobe PDF | Visualizza/apri |
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