Symbiotic stars in X-rays: IV. XMM-Newton, Swift, and TESS observations

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorInstituto de Astronomía y Física Del Espacio (IAFE)-
Autor(es): dc.contributorRivadavia-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorCONICET-Universidad Nacional de Hurlingham-
Autor(es): dc.contributorNASA Goddard Space Flight Center-
Autor(es): dc.contributorUniversity of Maryland Baltimore County-
Autor(es): dc.contributorUniversidade Do Vale Do Paraíba-
Autor(es): dc.contributorMC 5247 Columbia University-
Autor(es): dc.contributorStony Brook University-
Autor(es): dc.creatorLima, I. J.-
Autor(es): dc.creatorLuna, G. J.M.-
Autor(es): dc.creatorMukai, K.-
Autor(es): dc.creatorOliveira, A. S.-
Autor(es): dc.creatorSokoloski, J. L.-
Autor(es): dc.creatorWalter, F. M.-
Autor(es): dc.creatorPalivanas, N.-
Autor(es): dc.creatorNuñez, N. E.-
Autor(es): dc.creatorSouza, R. R.-
Autor(es): dc.creatorAraujo, R. A.N.-
Data de aceite: dc.date.accessioned2025-08-21T20:09:05Z-
Data de disponibilização: dc.date.available2025-08-21T20:09:05Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1051/0004-6361/202449913-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/300401-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/300401-
Descrição: dc.descriptionWhite dwarf symbiotic binaries are detected in X-rays with luminosities in the range of 1030 1034 ergs s-1. Their X-ray emission arises either from the accretion disk boundary layer, from a region where the winds from both components collide, or from nuclear burning on the surface of the white dwarf (WD). In our continuous effort to identify X-ray-emitting symbiotic stars, we studied four systems using observations from the Neil Gehrels Swift Observatory and XMM-Newton satellites in X-rays and from Transiting Exoplanet Survey Satellite (TESS) in the optical. The X-ray spectra were fit with absorbed optically thin thermal plasma models that are either single-or multitemperature with kT < 8 keV for all targets. Based on the characteristics of their X-ray spectra, we classified BD Cam as possible β-Type, V1261 Ori and CD-27-8661 as δ-Type, and confirmed NQ Gem as β/δ-Type. The δ-Type X-ray emission most likely arises from the boundary layer of the accretion disk, while in the case of BD Cam, its mostly soft emission originates from shocks, possibly between the red giant and WD and disk winds. In general, we find that the observed X-ray emission is powered by accretion at a low accretion rate of about 10-11 M· yr-1. The low ratio of X-ray to optical luminosities, however indicates that the accretion-disk boundary layer is mostly optically thick and tends to emit in the far or extreme UV. The detection of flickering in optical data provides evidence of the existence of an accretion disk.-
Descrição: dc.descriptionCONICET-Universidad de Buenos Aires Instituto de Astronomía y Física Del Espacio (IAFE), Av. Inte. Güiraldes 2620-
Descrição: dc.descriptionUniversidad Nacional de San Juan Facultad de Ciencias Exactas Físicas y Naturales Complejo Universitario Islas Malvinas Rivadavia, Av. Ignacio de la Roza 590 (O)-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho UNESP Campus of Guaratinguetá, Av. Dr. Ariberto Pereira da Cunha, 333 Pedregulho-
Descrição: dc.descriptionCONICET-Universidad Nacional de Hurlingham, Av. Gdor. Vergara 2222, Villa Tesei-
Descrição: dc.descriptionCRESST and X-ray Astrophysics Laboratory NASA Goddard Space Flight Center-
Descrição: dc.descriptionDepartment of Physics University of Maryland Baltimore County, 1000 Hilltop Circle-
Descrição: dc.descriptionIP and D Universidade Do Vale Do Paraíba, SP-
Descrição: dc.descriptionColumbia Astrophysics Lab. 1027 Pupin Hall MC 5247 Columbia University, 550 W120th St.-
Descrição: dc.descriptionDepartment of Physics and Astronomy Stony Brook University-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho UNESP Campus of Guaratinguetá, Av. Dr. Ariberto Pereira da Cunha, 333 Pedregulho-
Idioma: dc.languageen-
Relação: dc.relationAstronomy and Astrophysics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBinaries: symbiotic-
Palavras-chave: dc.subjectStars: individual: BD Cam-
Palavras-chave: dc.subjectStars: individual: CD-27-8661-
Palavras-chave: dc.subjectStars: individual: NQ Gem-
Palavras-chave: dc.subjectStars: individual: V1261 Ori-
Palavras-chave: dc.subjectWhite dwarfs-
Título: dc.titleSymbiotic stars in X-rays: IV. XMM-Newton, Swift, and TESS observations-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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