| Autor(es): |
Borges, Sarah V.
;
Rodrigues, Claudia. V.
;
Coelho, Jaziel G.
;
Malheiro, Manuel
;
Castro, Manuel
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | 15TH MARCEL GROSSMANN MEETING, PT A; v. N/A, p. 6-pg., 2022-01-01. |
| Resumo | |
The persistent emission of the anomalous X-ray pulsar 4U 0142+61 extends over a broad range of energy, from mid-infrared up to hard X-rays. In particular, this object is unique among soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) in presenting simultaneously mid-infrared emission and also pulsed optical emission. In spite of having many propositions to explain this wide range of emission, it is still lacking one that reproduces simultaneously all the observations. Filling this gap, we present a model that is able, for the first time, to reproduce simultaneously the entire spectral energy distribution of 4U 0142+61 using plausible physical components and parameters. We propose that the persistent emission comes from an accreting white dwarf (WD) surrounded by a debris disk. This model is thoroughly discussed at Ref. 2 and assumes that: (i) the hard X-rays are due to the bremsstrahlung emission from the post-shock region of the accretion column; (ii) the soft X-rays are originated by hot spots on the WD surface; and (iii) the optical and infrared emissions are caused by an optically thick dusty disk, the WD photosphere, and the tail of the post-shock region emission. In this scenario, 4U 0142+61 harbors a fast-rotator near-Chandrasekhar WD, which is highly magnetized. Such a WD can be formed by a merger of two less massive WDs. (AU) | |
| Processo FAPESP: | 13/15088-0 - Magnetares e os pulsares de Anãs Brancas magnetizadas, muito rápidas, massivas e estranhas e a geração de ondas gravitacionais |
| Beneficiário: | Jaziel Goulart Coelho |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/26258-4 - Matéria superdensa no universo |
| Beneficiário: | Manuel Máximo Bastos Malheiro de Oliveira |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 15/25972-0 - Desenvolvimento e Caracterização do Sistema de Detectores do Experimento MIRAX |
| Beneficiário: | Manuel Antonio Castro Ávila |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |