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http://hdl.handle.net/20.500.12386/24462
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | MESSINA, Sergio | en_US |
dc.contributor.author | Parihar, P. | en_US |
dc.contributor.author | BIAZZO, Katia | en_US |
dc.contributor.author | LANZA, Antonino Francesco | en_US |
dc.contributor.author | DISTEFANO, Elisa Maria Carmela | en_US |
dc.contributor.author | Melo, C. H. F. | en_US |
dc.contributor.author | Bradstreet, D. H. | en_US |
dc.contributor.author | Herbst, W. | en_US |
dc.date.accessioned | 2020-05-04T15:53:13Z | - |
dc.date.available | 2020-05-04T15:53:13Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24462 | - |
dc.description.abstract | We present the results of our analysis on V1481 Ori (JW 239), a young SB2 in the Orion nebula Cluster with a circumbinary disc accreting on the lower mass component. The analysis is based on high-resolution spectroscopic data and high-quality photometric time series about 20-yr long. Thanks to the spectroscopy, we confirm the binary nature of this system consisting of M3 + M4 components and derive the mass ratio M<SUB>B</SUB>/M<SUB>A</SUB> = 0.54, a variable luminosity ratio L<SUB>B</SUB>/L<SUB>A</SUB> = 0.68-0.94, and an orbital period P<SUB>orb</SUB> = 4.433 d. The photometric data allowed us to measure the rotation periods of the two components P<SUB>phot</SUB> = 4.4351 d and they are found to be synchronized with the orbital period. The simultaneous modelling of V-, I-band, and radial velocity curves in the 2005 season suggests that the variability is dominated by one hotspot on the secondary component covering at least ∼3.5 per cent of the stellar surface and about 420 K hotter than the unperturbed photosphere. Such a spot may originate from the material of the circumbinary disc accreting on to the secondary component. We also detect an apparent 6-yr periodic variation in the position of this hotspot, which is inferred from the phase migration of the light-curve maximum, which we interpret as due to either the presence of surface differential rotation as large as 0.065 per cent, a value compatible with the fully convective components, or to a periodic exchange of angular momentum between the disc and the star, which implies a minimum magnetic field strength of 650 G at the stellar surface. | en_US |
dc.language.iso | eng | en_US |
dc.title | Physical parameters and long-term photometric variability of V1481 Ori, an SB2 member of Orion nebula Cluster with an accreting component | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stv3000 | en_US |
dc.identifier.scopus | 2-s2.0-84976884453 | en_US |
dc.identifier.isi | 000373583900081 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/457/3/3372/2588884 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 457 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3372 | en_US |
dc.relation.lastpage | 3383 | en_US |
dc.relation.numberofpages | 12 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 8 | en_US |
dc.description.international | sì | 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 | 2016MNRAS.457.3372M | en_US |
dc.relation.ercsector | Scienze Fisiche Settori ERC (ERC) di riferimento::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.orcid | 0000-0002-2851-2468 | - |
crisitem.author.orcid | 0000-0002-1892-2180 | - |
crisitem.author.orcid | 0000-0001-5928-7251 | - |
crisitem.author.orcid | 0000-0002-2448-2513 | - |
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