On the behavior of the black hole candidate 1E 1740.7-2942’scorona based on long-term INTEGRAL database

Página do item simplificado
dc.contributor.authorStecchini, Paulo Eduardo
dc.contributor.authorLeão, Jurandi
dc.contributor.authorCastro, Manuel
dc.contributor.authorD'Amico, Flavio
dc.date.accessioned2025-04-08T12:51:53Z
dc.date.available2025-04-08T12:51:53Z
dc.date.issued22021
dc.description.abstractOne of the most straightforward ways to explain the hard X-ray spectra observed in X-ray binaries is to assume that comptonization of soft photons from the accretion disk is occurring. The region where this process takes place, called the corona, is characterized by only two parameters: its thermal energy kT and its optical depth τ. Hard X-ray spectra analysis is, thus, an imperative tool in diagnosing the behavior of these parameters. The lack of consistency in obtain-ing/analyzing long-term databases, however, may have been hindering this kind of characterization from being attained. With the aim of better understanding the corona behavior in the black hole candidate 1E 1740.7-2942, we performed a homogeneous analysis for a large hard X-ray data set from the ISGRI telescope on-board the INTEGRAL satellite. Results from modeling the spectra show that, for most of our sample, unsaturated thermal comptonization is the main mechanism responsible for the hard X-ray spectra observed in 1E 1740.7-2942.Moreover, such extensive database allowed us to produce what is probably the longest hard X-ray light curve of 1E 1740.7-2942 and whose units—due to recent findings regarding dynamical quantities of the system—could be expressed in %of Eddington’s luminosity.
dc.description.physical5 p.
dc.format.mimetypePDF
dc.identifier.affiliationInstituto Nacional de Pesquisas Espaciais
dc.identifier.affiliationInstituto Federal de São Paulo
dc.identifier.affiliationUniversidade Estadual de Campinas
dc.identifier.bibliographicCitationSTECCHINI, Paulo Eduardo et al. On the behavior of the black hole candidate 1E 1740.7-2942’scorona based on long-term INTEGRAL database. Astronomische Nachrichten, v. 342, n. 1-2, p. 315-319, 2021. Disponível em: https://onlinelibrary.wiley.com/doi/10.1002/asna.202113926.
dc.identifier.doi10.1002/asna.202113926
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/820
dc.language.isoen_US
dc.publisherWiley
dc.rights.holderAstronomische Nachrichten
dc.subject.keywordX-ray: binaries
dc.subject.keywordX-rays: general
dc.subject.keywordBlack hole physics
dc.subject.keywordSurveys
dc.titleOn the behavior of the black hole candidate 1E 1740.7-2942’scorona based on long-term INTEGRAL database
dc.typeArtigos de Periódicos

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
On the behavior of the black hole candidate 1E 1740.7-2942s corona based on long-term INTEGRAL database.pdf
Tamanho:
758.57 KB
Formato:
Adobe Portable Document Format
Descrição:
Acesso via Portal Capes
Baixar
Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar

Coleções

Produção acadêmica-PPGFA