Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/23087
Campo DC | Valore | Lingua |
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dc.contributor.author | Rauw, G. | - |
dc.contributor.author | Nazé, Y. | - |
dc.contributor.author | Wright, N. J. | - |
dc.contributor.author | Drake, J. J. | - |
dc.contributor.author | GUARCELLO, Mario Giuseppe | - |
dc.contributor.author | Prinja, R. K. | - |
dc.contributor.author | Peck, L. W. | - |
dc.contributor.author | Albacete Colombo, J. F. | - |
dc.contributor.author | Herrero, A. | - |
dc.contributor.author | Kobulnicky, H. A. | - |
dc.contributor.author | SCIORTINO, Salvatore | - |
dc.contributor.author | Vink, J. S. | - |
dc.date.accessioned | 2020-03-03T16:13:27Z | - |
dc.date.available | 2020-03-03T16:13:27Z | - |
dc.date.issued | 2015 | - |
dc.identifier.issn | 0067-0049 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/23087 | - |
dc.description | The Liège team acknowledges support from Belspo through an XMM PRODEX contract, from the FRS/FNRS and from an ARC grant for Concerted Research Actions, financed by the Federation Wallonia-Brussels. N.J.W. was supported by a Royal Astronomical Society research fellowship. Facilities: CXO , XMM . | - |
dc.description.abstract | We report on the analysis of the Chandra-ACIS data of O, B, and WR stars in the young association Cyg OB2. X-ray spectra of 49 O-stars, 54 B-stars, and 3 WR-stars are analyzed and for the brighter sources, the epoch dependence of the X-ray fluxes is investigated. The O-stars in Cyg OB2 follow a well-defined scaling relation between their X-ray and bolometric luminosities: {log}\\frac{{L}<SUB>{{X</SUB>}}}{{L}<SUB>{bol</SUB>}}=-7.2+/- 0.2. This relation is in excellent agreement with the one previously derived for the Carina OB1 association. Except for the brightest O-star binaries, there is no general X-ray overluminosity due to colliding winds in O-star binaries. Roughly half of the known B-stars in the surveyed field are detected, but they fail to display a clear relationship between L<SUB>X</SUB> and L<SUB>bol</SUB>. Out of the three WR stars in Cyg OB2, probably only WR 144 is itself responsible for the observed level of X-ray emission, at a very low {log}\\frac{{L}<SUB>{{X</SUB>}}}{{L}<SUB>{bol</SUB>}}=-8.8+/- 0.2. The X-ray emission of the other two WR-stars (WR 145 and 146) is most probably due to their O-type companion along with a moderate contribution from a wind-wind interaction zone. | - |
dc.language.iso | eng | - |
dc.title | X-Ray Emission from Massive Stars in Cyg OB2 | - |
dc.type | Article | - |
dc.identifier.doi | 10.1088/0067-0049/221/1/1 | en_US |
dc.identifier.scopus | 2-s2.0-84948747946 | en_US |
dc.identifier.isi | 000366620600001 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.1088/0067-0049/221/1/1 | - |
dc.identifier.url | https://arxiv.org/pdf/1401.8098 | - |
dc.relation.medium | STAMPA | - |
dc.relation.volume | 221 | - |
dc.relation.issue | 1 | - |
dc.relation.firstpage | 1 | - |
dc.type.referee | REF_1 | - |
dc.description.numberofauthors | 12 | - |
dc.description.international | sì | - |
dc.contributor.country | ITA | - |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | - |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | - |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015ApJS..221....1R | - |
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 | - |
dc.description.apc | no | - |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | - |
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. Palermo | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.orcid | 0000-0002-3010-2310 | - |
crisitem.author.orcid | 0000-0001-8691-1443 | - |
crisitem.journal.journalissn | 0067-0049 | - |
crisitem.journal.ance | E016254 | - |
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