Jitter radiation images, spectra and light curves from a relativistic spherical blastwave / Morsony Brian J.,Workman Jared C.,Lazzati Davide,Medvedev Mikhail V. // MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - 2009. - V. 392, l. 4. - P. 1397-1402.

ISSN/EISSN:

0035-8711 / нет данных

Type:

Article

Abstract:

We consider radiation emitted by the jitter mechanism in a Blandford-McKee self-similar blastwave. We assume the magnetic field configuration throughout the whole blastwave meets the condition for the emission of jitter radiation and we compute the ensuing images, light curves and spectra. The calculations are performed for both a uniform and a wind environment. We compare our jitter results to synchrotron results. We show that jitter radiation produces slightly different spectra than synchrotron, in particular between the self-absorption and the peak frequency, where the jitter spectrum is flat, while the synchrotron spectrum grows v(1/3). The spectral difference is reflected in the early decay slope of the light curves. We conclude that jitter and synchrotron afterglows can be distinguished from each other with good quality observations. However, it is unlikely that the difference can explain the peculiar behaviour of several recent observations, such as flat X-ray slopes and uncorrelated optical and X-ray behaviour.

Author keywords:

magnetic fields; radiation mechanisms: non-thermal; gamma rays: bursts GAMMA-RAY BURSTS; DIFFUSIVE SYNCHROTRON-RADIATION; MAGNETIC-FIELD GENERATION; SWIFT XRT DATA; COLLISIONLESS SHOCKS; PROMPT EMISSION; PARTICLE-ACCELERATION; AFTERGLOW EMISSION; CHROMATIC BREAKS; SELF-ABSORPTION

DOI:

10.1111/j.1365-2966.2008.13856

Web of Science ID:

ISI:000262479300007

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	FEB 1
Publisher	WILEY-BLACKWELL PUBLISHING, INC
Address	COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
Language	English
Keywords-Plus	GAMMA-RAY BURSTS; DIFFUSIVE SYNCHROTRON-RADIATION; MAGNETIC-FIELD GENERATION; SWIFT XRT DATA; COLLISIONLESS SHOCKS; PROMPT EMISSION; PARTICLE-ACCELERATION; AFTERGLOW EMISSION; CHROMATIC BREAKS; SELF-ABSORPTION
Research-Areas	Astronomy \& Astrophysics
Web-of-Science-Categories	Astronomy \& Astrophysics
Author-Email	brian.morsony@colorado.edu
Funding-Acknowledgement	NSF {[}AST-0407040, AST-0307502, AST-0708213]; NASA Astrophysical Theory {[}NNG04GL01G, NNX07AH08G, NNG06GI06G]; Swift Guest Investigator Program {[}NNX06AB69G, NNX07AJ50G, NNX08AL39G]; DoE {[}DE-FG02-04ER54790, DE-FG02-07ER54940]; Institute for Advanced Study
Funding-Text	This work was supported by NSF grants AST-0407040 (JW), AST- 0307502 ( BM, DL) and AST- 0708213 ( MM), NASA Astrophysical Theory Grants NNG04GL01G and NNX07AH08G ( JW) and NNG06GI06G ( BM, DL), Swift Guest Investigator Program grants NNX06AB69G ( JW, BM, DL) and NNX07AJ50G and NNX08AL39G ( MM) and DoE grants DE-FG02-04ER54790 and DE-FG02-07ER54940 ( MM). MM gratefully acknowledges support from the Institute for Advanced Study.
Number-of-Cited-References	37
Journal-ISO	Mon. Not. Roy. Astron. Soc.
Doc-Delivery-Number	394VK