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Variable structures in the stellar wind of the HMXB Vela X-1

Autor: Abalo, L., Kretschmar, P., Fürst, F., Diez, C. M., Mellah, I. El, Grinberg, V., Guainazzi, M., Martínez-Núñez, S., Manousakis, A., Amato, R., Zhou, M., Beijersbergen, M. W.

Strong stellar winds are an important feature in wind-accreting high-mass X-ray binary (HMXB) systems, providing insights into stellar evolution and their impact on surrounding environments. However, the long-term evolution and temporal variability o

Externí odkaz: http://arxiv.org/abs/2410.21456

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Characterisation of the stellar wind in Cyg X-1 via modelling of colour-colour diagrams

Autor: Lai, E. V., De Marco, B., Cavecchi, Y., Mellah, I. El, Cinus, M., Diez, C. M., Grinberg, V., Zdziarski, A. A., Uttley, P., Bachetti, M., José, J., Sala, G., Różańska, A., Wilms, J.

Cygnus X-1 is a high mass X-ray binary where accretion onto the black hole is mediated by the stellar wind from the blue supergiant companion star HDE 226868. Depending on the position of the black hole along the orbit, X-ray observations can probe d

Externí odkaz: http://arxiv.org/abs/2408.05852

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Observing the onset of the accretion wake in Vela X-1

Autor: Diez, C. M., Grinberg, V., Fürst, F., Mellah, I. El, Zhou, M., Santangelo, A., Martínez-Núñez, S., Amato, R., Hell, N., Kretschmar, P.

Publikováno v: A&A 674, A147 (2023)

High-Mass X-ray Binaries (HMXBs) offer a unique opportunity for the investigation of accretion onto compact objects and of wind structure in massive stars. A key source for such studies is the bright neutron star HMXB Vela X-1 whose convenient physic

Externí odkaz: http://arxiv.org/abs/2303.09631

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The spectral-timing analysis of Cygnus X-1 with Insight-HXMT

Autor: Zhou, M., Grinberg, V., Bu, Q. -C., Santangelo, A., Cangemi, F., Diez, C. M., König, O., Ji, L., Nowak, M. A., Pottschmidt, K., Rodriguez, J., Wilms, J., Zhang, S., Qu, J. -L., Zhang, S. -N.

Publikováno v: A&A 666, A172 (2022)

Cygnus X-1, as the first discovered black hole binary, is a key source for understanding the mechanisms of state transitions, and the scenarios of accretion in extreme gravity fields. We present a spectral-timing analysis of observations taken with t

Externí odkaz: http://arxiv.org/abs/2209.05930

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Continuum, cyclotron line, and absorption variability in the high-mass X-ray binary Vela X-1

Autor: Diez, C. M., Grinberg, V., Fürst, F., Sokolova-Lapa, E., Santangelo, A., Wilms, J., Pottschmidt, K., Martínez-Núñez, S., Malacaria, C., Kretschmar, P.

Publikováno v: A&A 660, A19 (2022)

Because of its complex clumpy wind, prominent cyclotron resonant scattering features, intrinsic variability and convenient physical parameters (close distance, high inclination, small orbital separation) which facilitate the observation and analysis

Externí odkaz: http://arxiv.org/abs/2201.04169

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