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dc.contributor.author
Flaccomio, E.
dc.contributor.author
Albacete Colombo, Juan Facundo
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dc.contributor.author
Drake, J. J.
dc.contributor.author
Guarcello, M. G.
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Kashyap, V.
dc.contributor.author
Wright, N. J.
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Briggs, K.
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Ercolano, B.
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McCollough, M.
dc.contributor.author
Sciortino, S.
dc.date.available
2024-04-08T12:53:06Z
dc.date.issued
2023-10
dc.identifier.citation
Flaccomio, E.; Albacete Colombo, Juan Facundo; Drake, J. J.; Guarcello, M. G.; Kashyap, V.; et al.; X-Ray Spectral Characterization of the Young Cygnus OB2 Population; IOP Publishing; Astrophysical Journal Supplement Series; 269; 1; 10-2023; 1-19
dc.identifier.issn
0067-0049
dc.identifier.uri
http://hdl.handle.net/11336/232316
dc.description.abstract
We analyze the X-ray spectra of the ∼8000 sources detected in the Cygnus OB2 Chandra Legacy Survey (this focus issue), with the goals of characterizing the coronal plasma of the young low-mass stars in the region and estimating their intrinsic X-ray luminosities. We adopt two different strategies for X-ray sources for which more or less than 20 photons were detected. For the brighter sample we fit the spectra with absorbed isothermal models. In order to limit uncertainties, for most of the fainter Cygnus OB2 members in this sample we constrain the spectral parameters to characteristic ranges defined from the brightest stars. For X-ray sources with <20 net photons we adopt a conversion factor from detected photon flux to intrinsic flux. This was defined, building on the results for the previous sample, as a function of the 20% quantile of the detected photon energy distributions, which we prove to also correlate well with extinction. We then use the X-ray extinction from the spectral fits to constrain the ratio between optical and X-ray extinction toward Cyg OB2, finding it consistent with standard “Galactic” values, when properly accounting for systematics. Finally, we exploit the large number of sources to constrain the average coronal abundances of several elements, through two different ensemble analyses of the X-ray spectra of low-mass Cyg OB2 members. We find the pattern of abundances to be largely consistent with that derived for the young stellar coronae in the Orion Nebula Cluster.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Stellar activity
dc.subject
Stellar coronae
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pre main sequence stars
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T Tauri stars
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
X-Ray Spectral Characterization of the Young Cygnus OB2 Population
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-04-08T11:12:54Z
dc.journal.volume
269
dc.journal.number
1
dc.journal.pagination
1-19
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Flaccomio, E.. Istituto Nazionale di Astrofísica. Osservatorio Astronómico di Palermo; Italia
dc.description.fil
Fil: Albacete Colombo, Juan Facundo. Universidad Nacional de Rio Negro. Sede Atlantica. Departamento de Investigación en Ciencias Exactas, Naturales y de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Confluencia; Argentina
dc.description.fil
Fil: Drake, J. J.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Guarcello, M. G.. Istituto Nazionale di Astrofísica. Osservatorio Astronómico di Palermo; Italia
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Fil: Kashyap, V.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
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Fil: Wright, N. J.. Keele University.; Reino Unido
dc.description.fil
Fil: Briggs, K.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Ercolano, B.. Massachusetts Institute of Technology; Estados Unidos
dc.description.fil
Fil: McCollough, M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Sciortino, S.. Istituto Nazionale di Astrofísica. Osservatorio Astronómico di Palermo; Italia
dc.journal.title
Astrophysical Journal Supplement Series
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://doi.org/10.3847/1538-4365/acdd66
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3847/1538-4365/acdd66
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