INTEGRAL Observations of OAO 1657-415: Gamma-Ray Tomography of a B Super Giant

• Autorzy: Denis M. , Bulik T. , Marcinkowski R.
• Języki publikacji: EN

Abstrakty

EN

OAO 1657-415 is an accreting pulsar in an eclipsing binary system. We analyzed the INTEGRAL core program observations of this object and obtained the eclipse light curve in the soft gamma-ray band between 15 keV and 40 keV. We note that the gamma rays from the pulsar allow to probe the density profile of the outer layers of the B super giant companion. We find that the density profile of the outer layer can be described by a power law with the index α=8.5. We also note that the fit hints toward smaller inclinations of the system within the allowed range 60°

Słowa kluczowe

EN

pulsars: individual: OAO 1657-415; gamma rays: observations

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2010
• Tom: Vol. 60, No. 1
• Strony: 75--82
• Opis fizyczny: Bibliogr. 14 poz., mapa, wykr.

Twórcy

autor

Denis M.

• Space Research Center, Bartycka 18a, 00-718 Warsaw, Poland

autor

Bulik T.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
• Nicolaus Copernicus Center, Bartycka 18, 00-718 Warsaw, Poland

autor

Marcinkowski R.

• Institute for Nuclear Studies, 05-400 Świerk, Poland

Bibliografia

• Armstrong, J.T., et al. 1980, ApJ, 236, L131.
• Barnstedt, J., et al. 2008, A&A, 486, 293.
• Bildsten, L., et al. 1997, ApJS, 113, 367.
• Byrne, P.F., et al. 1981, ApJ, 246, 951.
• Chakrabarty, D., et al. 1993, ApJ, 403, L33.
• Chakrabarty, D., Wang, Z., Juett, A.M., Lee, J.C., and Roche, P. 2002, ApJ, 573, 789.
• Denis, M., et al. 2004, Proceedings of the 5th INTEGRAL Workshop on The INTEGRAL Universe, 453.
• Kamata, Y., et al. 1990, PASJ, 42, 785.
• Naik, S., Mikherjee, U., Paul, B., and Choi, C.S 2009, Adv. in Sp. Res., 43, 900.
• Orlandini, M., et al. 1999, A&A, 349, L9.
• Polidan, R.S., Pollard, G.S.G., Sanford, P.W., and Locke, M.C. 1978, Nature, 275, 296.
• Ubertini, P.,et al. 2003, A&A, 411, L131.
• White, N.E., and Pravdo, S.H. 1979, ApJ, 233, L121.
• Winkler, C., et al. 2003, A&A, 411, L1.