DUST PRODUCTION AND PARTICLE ACCELERATION IN SUPERNOVA 1987A REVEALED WITH ALMA
Artikel i vetenskaplig tidskrift, 2014
Supernova (SN) explosions are crucial engines driving the evolution of galaxies by shock heating gas, increasing the metallicity, creating dust, and accelerating energetic particles. In 2012 we used the Atacama Large Millimeter/Submillimeter Array to observe SN 1987A, one of the best-observed supernovae since the invention of the telescope. We present spatially resolved images at 450 mu m, 870 mu m, 1.4 mm, and 2.8 mm, an important transition wavelength range. Longer wavelength emission is dominated by synchrotron radiation from shock-accelerated particles, shorter wavelengths by emission from the largest mass of dust measured in a supernova remnant (>0.2 M-circle dot). For the first time we show unambiguously that this dust has formed in the inner ejecta (the cold remnants of the exploded star's core). The dust emission is concentrated at the center of the remnant, so the dust has not yet been affected by the shocks. If a significant fraction survives, and if SN 1987A is typical, supernovae are important cosmological dust producers.
galaxies: ISM
REVERSE SHOCK
supernovae:
EMISSION
EJECTA
individual (1987A)
REMNANT
Magellanic Clouds
OPTICAL-PROPERTIES
ISM: supernova remnants
SN 1987A
EVOLUTION
HUBBLE-SPACE-TELESCOPE
EARLY UNIVERSE
MASSIVE STARS
Författare
R. Indebetouw
University of Virginia
National Radio Astronomy Observatory
M. Matsuura
UCL
E. Dwek
NASA Goddard Space Flight Center
G. Zanardo
University of Western Australia
M. J. Barlow
UCL
Maarten Baes
Universiteit Gent
P. Bouchet
CEA Saclay
D. N. Burrows
Pennsylvania State University
R. Chevalier
University of Virginia
G. C. Clayton
Louisiana State University
C. Fransson
Stockholms universitet
B. Gaensler
The University of Sydney
Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO
R. Kirshner
Harvard-Smithsonian Center for Astrophysics
M. Lakicevic
Keele University
K. S. Long
STScI
P. Lundqvist
Stockholms universitet
Ivan Marti-Vidal
Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium
J. M. Marcaide
Universitat de ValEncia
R. McCray
University of Colorado at Boulder
M. Meixner
STScI
Johns Hopkins University
C. Y. Ng
The University of Hong Kong
S. Park
University of Texas at Arlington
G. Sonneborn
STScI
L. Staveley-Smith
Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO
University of Western Australia
C. Vlahakis
Atacama Large Millimeter-submillimeter Array
J. T. van Loon
Keele University
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 782 1 6- L2Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
DOI
10.1088/2041-8205/782/1/l2