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Binary orbits as th...
Binary orbits as the driver of gamma-ray emission and mass ejection in classical novae
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- Chomiuk, L. (författare)
- Michigan State University
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- Linford, Justin D. (författare)
- Michigan State University
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- Yang, Jun, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- O'Brien, T. J. (författare)
- University of Manchester
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- Paragi, Z. (författare)
- Joint Institute for VLBI in Europe (JIVE)
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- Mioduszewski, A. J. (författare)
- National Radio Astronomy Observatory
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- Beswick, R. J. (författare)
- University of Manchester
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- Cheung, C. C. (författare)
- Naval Research Laboratory
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- Mukai, K. (författare)
- NASA Goddard Space Flight Center,University of Maryland
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- Nelson, T. (författare)
- University of Minnesota
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- Ribeiro, Varm (författare)
- University of Cape Town
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- Rupen, M. P. (författare)
- National Research Council Canada,National Radio Astronomy Observatory
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- Sokoloski, J. L. (författare)
- Columbia University in the City of New York
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- Weston, J. (författare)
- Columbia University in the City of New York
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- Zheng, Y. (författare)
- Columbia University in the City of New York
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- Bode, M. F. (författare)
- Liverpool John Moores University
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- Eyres, S. (författare)
- University of Central Lancashire
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- Roy, N. (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Taylor, G. (författare)
- University of New Mexico
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(creator_code:org_t)
- 2014-10-08
- 2014
- Engelska.
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 514:7522, s. 339-
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Abstract
Ämnesord
Stäng
- Classical novae are the most common astrophysical thermonuclear explosions, occurring on the surfaces of white dwarf stars accreting gas from companions in binary star systems(1). Novae typically expel about 10(-4) solar masses of material at velocities exceeding 1,000 kilometres per second. However, the mechanism of mass ejection in novae is poorly understood, and could be dominated by the impulsive flash of thermonuclear energy(2), prolonged optically thick winds(3) or binary interaction with the nova envelope(4). Classical novae are now routinely detected at gigaelectronvolt gamma-ray wavelengths(5), suggesting that relativistic particles are accelerated by strong shocks in the ejecta. Here we report high-resolution radio imaging of the gamma-ray-emitting nova V959 Mon. We find that its ejecta were shaped by the motion of the binary system: some gas was expelled rapidly along the poles as a wind from the white dwarf, while denser material drifted out along the equatorial plane, propelled by orbital motion(6,7). At the interface between the equatorial and polar regions, we observe synchrotron emission indicative of shocks and relativistic particle acceleration, thereby pinpointing the location of gamma-ray production. Binary shaping of the nova ejecta and associated internal shocks are expected to be widespread among novae(8), explaining why many novae are gamma-ray emitters(5).
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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Chomiuk, L.
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Linford, Justin ...
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Yang, Jun, 1979
-
O'Brien, T. J.
-
Paragi, Z.
-
Mioduszewski, A. ...
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visa fler...
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Beswick, R. J.
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Cheung, C. C.
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Mukai, K.
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Nelson, T.
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Ribeiro, Varm
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Rupen, M. P.
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Sokoloski, J. L.
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Weston, J.
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Zheng, Y.
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Bode, M. F.
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Eyres, S.
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Roy, N.
-
Taylor, G.
-
visa färre...
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