Observations of the post-shock break-out emission of SN 2011dh with XMM-Newton
Sasaki M, Ducci L (2012)
Publication Status: Published
Publication Type: Journal article
Publication year: 2012
Journal
Publisher: EDP SCIENCES S A
Book Volume: 546
DOI: 10.1051/0004-6361/201220200
Abstract
Context. After the occurrence of the type cIIb SN 2011dh in the nearby
spiral galaxy M 51 numerous observations were performed with different
telescopes in various bands ranging from radio to γ-rays.
Aims: We
analysed the XMM-Newton and Swift observations taken 3 to 30 days after
the SN explosion to study the X-ray spectrum of SN 2011dh.
Methods:
We extracted spectra from the XMM-Newton observations, which took place
~7 and 11 days after the SN. In addition, we created integrated
Swift/XRT spectra of 3 to 10 days and 11 to 30 days.
Results: The
spectra can be well-fitted with a power-law spectrum absorbed with
Galactic foreground absorption. In addition, we find a harder spectral
component in the first XMM-Newton spectrum taken at t ≈ 7 d. This
component is also detected in the first Swift spectrum of t = 3-10 d.
Conclusions: While the persistent component can be explained as inverse
Compton emission from radio synchrotron emitting electrons or emission
of the reverse shock, the harder component is most likely bremsstrahlung
emission from the shocked stellar wind. Therefore, the harder X-ray
emission that fades away after t ≈ 10 d can be interpreted as emission
from the shocked circumstellar wind of SN 2011dh.
Authors with CRIS profile
Involved external institutions
Germany (DE)How to cite
APA:
Sasaki, M., & Ducci, L. (2012). Observations of the post-shock break-out emission of SN 2011dh with XMM-Newton. Astronomy & Astrophysics, 546. https://doi.org/10.1051/0004-6361/201220200
MLA:
Sasaki, Manami, and Lorenzo Ducci. "Observations of the post-shock break-out emission of SN 2011dh with XMM-Newton." Astronomy & Astrophysics 546 (2012).
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