Sökning: id:"swepub:oai:research.chalmers.se:04bfd6b5-c6c3-461f-9325-5adf386de33c" >
Spectral and Morpho...
Spectral and Morphological Analysis of the Remnant of Supernova 1987A with ALMA and ATCA
-
- Zanardo, G. (författare)
- University of Western Australia
-
- Staveley-Smith, L. (författare)
- ARC Centre of Excellence for All-sky Astrophysics (CAASTRO),University of Western Australia
-
- Indebetouw, R. (författare)
- University of Virginia,National Radio Astronomy Observatory
-
visa fler...
-
- Chevalier, R. (författare)
- University of Virginia
-
- Matsuura, M. (författare)
- University College London (UCL)
-
- Gaensler, B. (författare)
- The University of Sydney,ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)
-
- Barlow, M. J. (författare)
- University College London (UCL)
-
- Fransson, C. (författare)
- Stockholms universitet,Stockholm University
-
- Manchester, R. N. (författare)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
-
- Baes, Maarten (författare)
- Universiteit Gent,Ghent university
-
- Kamenetzky, J. (författare)
- University of Arizona
-
- Lakicevic, M. (författare)
- Keele University
-
- Lundqvist, P. (författare)
- Stockholms universitet,Stockholm University
-
- Marcaide, J. M. (författare)
- Universitat de Valencia,Donostia International Physics Center
-
- Marti-Vidal, Ivan, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Meixner, M. (författare)
- Space Telescope Science Institute (STScI),Johns Hopkins University
-
- Ng, C. Y. (författare)
- The University of Hong Kong
-
- Park, S. (författare)
- University of Texas at Arlington
-
- Sonneborn, G. (författare)
- NASA Goddard Space Flight Center
-
- Spyromilio, J. (författare)
- European Southern Observatory (ESO)
-
- van Loon, J. T. (författare)
- Keele University
-
visa färre...
-
(creator_code:org_t)
- 2014-11-10
- 2014
- Engelska.
-
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 796:2, s. Art. no. 82-
- Relaterad länk:
-
http://publications.... (primary) (free)
-
visa fler...
-
http://hub.hku.hk/bi...
-
https://research.cha...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We present a comprehensive spectral and morphological analysis of the remnant of supernova (SN) 1987A with the Australia Telescope Compact Array (ATCA) and the Atacama Large Millimeter/submillimeter Array (ALMA). The non-thermal and thermal components of the radio emission are investigated in images from 94 to 672 GHz (lambda 3.2 mm to 450 mu m), with the assistance of a high-resolution 44 GHz synchrotron template from the ATCA, and a dust template from ALMA observations at 672 GHz. An analysis of the emission distribution over the equatorial ring in images from 44 to 345 GHz highlights a gradual decrease of the east-to-west asymmetry ratio with frequency. We attribute this to the shorter synchrotron lifetime at high frequencies. Across the transition from radio to far infrared, both the synchrotron/dust-subtracted images and the spectral energy distribution (SED) suggest additional emission beside the main synchrotron component (S-nu proportional to nu(-0.73)) and the thermal component originating from dust grains at T similar to 22 K. This excess could be due to free-free flux or emission from grains of colder dust. However, a second flat-spectrum synchrotron component appears to better fit the SED, implying that the emission could be attributed to a pulsar wind nebula (PWN). The residual emission is mainly localized west of the SN site, as the spectral analysis yields -0.4 less than or similar to alpha less than or similar to -0.1 across the western regions, with alpha similar to 0 around the central region. If there is a PWN in the remnant interior, these data suggest that the pulsar may be offset westward from the SN position.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- radio continuum: general
- radiation mechanisms: thermal
- ISM: supernova remnants
- radiation mechanisms: non-thermal
- stars: neutron
- supernovae: individual (SN 1987A)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Zanardo, G.
-
Staveley-Smith, ...
-
Indebetouw, R.
-
Chevalier, R.
-
Matsuura, M.
-
Gaensler, B.
-
visa fler...
-
Barlow, M. J.
-
Fransson, C.
-
Manchester, R. N ...
-
Baes, Maarten
-
Kamenetzky, J.
-
Lakicevic, M.
-
Lundqvist, P.
-
Marcaide, J. M.
-
Marti-Vidal, Iva ...
-
Meixner, M.
-
Ng, C. Y.
-
Park, S.
-
Sonneborn, G.
-
Spyromilio, J.
-
van Loon, J. T.
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Astronomi astrof ...
- Artiklar i publikationen
-
Astrophysical Jo ...
- Av lärosätet
-
Chalmers tekniska högskola