Zobrazeno 1 - 10
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pro vyhledávání: '"Bjornsson, C."'
[SHORTENED VERSION] Observations of radio emission from young core-collapse supernovae (CCSNe) allow one to study the history of the pre-supernova stellar wind, trace the density structure of the ejected material, and probe the magnetohydrodynamics t
Externí odkaz:
http://arxiv.org/abs/2410.07800
Autor:
Bjornsson, C. -I.
Observations of radiative cooling in a synchrotron source offer a possibility to further constrain its properties. Inverse Compton cooling is indicated in the radio spectra during the early phases of SN\,2020oi. It is shown that contrary to previous
Externí odkaz:
http://arxiv.org/abs/2209.03057
Autor:
Bjornsson, C. -I.
Inhomogeneities can influence the polarisation emerging from a synchrotron source. However, it is shown that the frequency distribution of circular polarisation is only marginally affected, although its magnitude may change substantially. This is use
Externí odkaz:
http://arxiv.org/abs/2004.06978
Akademický článek
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Autor:
Perez-Torres, M. A., Lundqvist, P., Beswick, R., Bjornsson, C. -I., Muxlow, T. W. M., Paragi, Z., Ryder, S., Alberdi, A., Fransson, C., Marcaide, J. M., Marti-Vidal, I., Ros, E., Argo, M., Guirado, J. C.
We report deep EVN and eMERLIN observations of the Type Ia SN 2014J in the nearby galaxy M 82. Our observations represent, together with JVLA observations of SNe 2011fe and 2014J, the most sensitive radio studies of Type Ia SNe ever. By combining dat
Externí odkaz:
http://arxiv.org/abs/1405.4702
Autor:
Bjornsson, C. -I.
Inhomogeneities in a synchrotron source can severely affect the conclusions drawn from observations regarding the source properties. However, their presence is not always easy to establish, since several other effects can give rise to similar observe
Externí odkaz:
http://arxiv.org/abs/1303.4254
Autor:
Borgonovo, L., Bjornsson, C. -I.
Publikováno v:
Astrophys.J.652:1423-1435,2006
The statistical properties of a complete, flux limited sample of 197 long gamma--ray bursts (GRBs) detected by BATSE are studied. In order to bring forth their main characteristics, care was taken to define a representative set of ten parameters. A m
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606487
Autor:
Bjornsson, C. -I., Fransson, C.
Publikováno v:
Astrophys.J. 605 (2004) 823-829
The radio and X-ray observations of the Type Ic supernova SN 2002ap are modeled. We find that inverse Compton cooling by photospheric photons explains the observed steep radio spectrum, and also the X-ray flux observed by XMM. Thermal emission from t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0401196
Autor:
Bjornsson, C. -I.
The role of Compton cooling in the standard model for the afterglows of gamma-ray bursts is considered. When electrons cool by scattering off their own synchrotron photons, three cooling regimes are identified in which the observed synchrotron radiat
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105034
Akademický článek
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