The contact binary system TYC 7275-1968-1 as seen by optical, UV and X-ray observations

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dc.contributor.authorLima, Isabel de Jesus
dc.contributor.authorMattiuci, Ana Carolina
dc.contributor.authorLuna, Gerardo Juan Manuel
dc.contributor.authorOliveira, Alexandre Soares de
dc.contributor.authorRodrigues, Claudia Vilega
dc.contributor.authorPalivanas, Natália
dc.contributor.authorNuñez, Natalia Edith
dc.date.accessioned2025-02-27T15:47:18Z
dc.date.available2025-02-27T15:47:18Z
dc.date.issued22024
dc.description.abstractWe present an analysis of publicly available X-ray and optical observations of TYC 7275-1968-1, a contact binary, red nova progenitor candidate. The long optical time series of ASAS-3, SuperWASP, CRTS, Gaia, ASASSN, and TESS enabled us to improve its orbital period to 0.3828071 ± 0.0000026 d. We show the presence of an X-ray and UV source associated with TYC 7275-1968-1 from Neil Gehrels Swift Observatory, that was previously assumed to be the counterpart of CD -36 8436 (V1044 Cen), a symbiotic star located 22 arcsec from the red nova candidate. The X-ray data indicate the presence of a region with a temperature of 𝑘𝑇 = 0.8+0.9 −0.1 keV and a luminosity of 1.4+0.1 −0.2 × 1031 erg s−1 in the range 0.3 – 10 keV. The detection of X-rays and modulated UV emission suggests that both components of the binary are chromospherically active.
dc.description.physical7 p.
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriCNPq (Proc: 382618/2021-1; Proc: 310930/2021-9) FAPESP (#2017/20309-7) CAPES (88887.823264/2023-00)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidad de Buenos Aires
dc.identifier.affiliationUniversidad Nacional de San Juan
dc.identifier.affiliationInstituto Nacional de Pesquisas Espaciais
dc.identifier.affiliationUniversidad Nacional de Hurlingham
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.bibliographicCitationLIMA, Isabel de Jesus et al. The contact binary system TYC 7275-1968-1 as seen by optical, UV and X-ray observations. New Astronomy, v. 107, p. 1-7, 2024. Disponível em:
dc.identifier.doi10.1016/j.newast.2023.102145
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/610
dc.language.isoen_US
dc.publisherElsevier
dc.rights.holderElsevier
dc.subject.keywordStars: eclipsing
dc.subject.keywordStars: mass-loss
dc.titleThe contact binary system TYC 7275-1968-1 as seen by optical, UV and X-ray observations
dc.typeArtigos de Periódicos

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