Zobrazeno 1 - 10
of 254
pro vyhledávání: '"Owocki, S P"'
Autor:
Das, B., Owocki, S. P.
Hot magnetic stars often exhibit incoherent circularly polarized radio emission thought to arise from gyro-synchrotron emission by energetic electrons trapped in the circumstellar magnetosphere. Theoretical scalings for electron acceleration by magne
Externí odkaz:
http://arxiv.org/abs/2308.01493
Early-type B stars with strong magnetic fields and rapid rotation form centrifugal magnetospheres (CMs), as the relatively weak stellar wind becomes magnetically confined and centrifugally supported above the Kepler co-rotation radius. CM plasma is c
Externí odkaz:
http://arxiv.org/abs/2306.03990
Autor:
Leto, P., Oskinova, L. M., Buemi, C. S., Shultz, M. E., Cavallaro, F., Trigilio, C., Umana, G., Fossati, L., Pillitteri, I., Krticka, J., Ignace, R., Bordiu, C., Bufano, F., Catanzaro, G., Cerrigone, L., Giarrusso, M., Ingallinera, A., Loru, S., Owocki, S. P., Postnov, K. A., Riggi, S., Robrade, J., Leone, F.
KQVel is a binary system composed of a slowly rotating magnetic Ap star with a companion of unknown nature. In this paper, we report the detection of its radio emission. We conducted a multi-frequency radio campaign using the ATCA interferometer (ban
Externí odkaz:
http://arxiv.org/abs/2207.14075
Autor:
Poniatowski, L. G., Kee, N. D., Sundqvist, J. O., Driessen, F. A., Moens, N., Owocki, S. P., Gayley, K. G., Decin, L., de Koter, A., Sana, H.
Publikováno v:
A&A 667, A113 (2022)
In accelerating and supersonic media, the interaction of photons with spectral lines can be of ultimate importance. However, fully accounting for such line forces currently can only be done by specialised codes in 1-D steady-state flows. More general
Externí odkaz:
http://arxiv.org/abs/2204.09981
Strongly magnetic, rapidly rotating B-type stars with relatively weak winds form centrifugal magnetospheres (CMs), as the stellar wind becomes magnetically confined above the Kepler co-rotation radius. Approximating the magnetic field as a dipole til
Externí odkaz:
http://arxiv.org/abs/2202.00615
Autor:
Shultz, M. E., Owocki, S. P., ud-Doula, A., Biswas, A., Bohlender, D., Chandra, P., Das, B., David-Uraz, A., Khalack, V., Kochukhov, O., Landstreet, J. D., Leto, P., Monin, D., Neiner, C., Rivinius, Th., Wade, G. A.
Numerous magnetic hot stars exhibit gyrosynchrotron radio emission. The source electrons were previously thought to be accelerated to relativistic velocities in the current sheet formed in the middle magnetosphere by the wind opening magnetic field l
Externí odkaz:
http://arxiv.org/abs/2201.05512
HD 144941 is an extreme He (EHe) star, a rare class of subdwarf OB star formed from the merger of two white dwarf (WD) stars. Uniquely amongst EHe stars, its light curve has been reported to be modulated entirely by rotation, suggesting the presence
Externí odkaz:
http://arxiv.org/abs/2107.11211
Autor:
Poniatowski, L. G., Sundqvist, J. O., Kee, N. D., Owocki, S. P., Marchant, P., Decin, L., de Koter, A., Mahy, L., Sana, H.
Publikováno v:
A&A 647, A151 (2021)
Vigorous mass loss in the classical Wolf-Rayet (WR) phase is important for the late evolution and final fate of massive stars. We develop spherically symmetric time-dependent and steady-state hydrodynamical models of the radiation-driven wind outflow
Externí odkaz:
http://arxiv.org/abs/2012.05823
Line-driven stellar winds from massive (OB) stars are subject to a strong line-deshadowing instability. Recently, spectropolarimetric surveys have collected ample evidence that a subset of Galactic massive stars hosts strong surface magnetic fields.
Externí odkaz:
http://arxiv.org/abs/2010.05650
Autor:
Shultz, M. E., Owocki, S., Rivinius, Th., Wade, G. A., Neiner, C., Alecian, E., Kochukhov, O., Bohlender, D., ud-Doula, A., Landstreet, J. D., Sikora, J., David-Uraz, A., Petit, V., Cerrahoğlu, P., Fine, R., Henson, G., MiMeS, the, Collaborations, BinaMIcS
Rapidly rotating early-type stars with strong magnetic fields frequently show H$\alpha$ emission originating in Centrifugal Magnetospheres (CMs), circumstellar structures in which centrifugal support due to magnetically enforced corotation of the mag
Externí odkaz:
http://arxiv.org/abs/2009.12336