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.

HUBBLE-SPACE-TELESCOPE

OPTICAL-PROPERTIES

EJECTA

ISM: supernova remnants

EMISSION

individual (1987A)

SN 1987A

galaxies: ISM

EARLY UNIVERSE

REVERSE SHOCK

REMNANT

MASSIVE STARS

EVOLUTION

supernovae:

Magellanic Clouds

Författare

R. Indebetouw

National Radio Astronomy Observatory

University of Virginia

M. Matsuura

University College London (UCL)

E. Dwek

NASA Goddard Space Flight Center

G. Zanardo

University of Western Australia

M. J. Barlow

University College London (UCL)

Maarten Baes

Universiteit Gent

P. Bouchet

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

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

ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)

R. Kirshner

Harvard-Smithsonian Center for Astrophysics

M. Lakicevic

Keele University

K. S. Long

Space Telescope Science Institute (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

Johns Hopkins University

Space Telescope Science Institute (STScI)

C. Y. Ng

The University of Hong Kong

S. Park

University of Texas at Arlington

G. Sonneborn

Space Telescope Science Institute (STScI)

L. Staveley-Smith

University of Western Australia

ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)

C. Vlahakis

Atacama Large Millimeter-submillimeter Array (ALMA)

J. T. van Loon

Keele University

Astrophysical Journal Letters

2041-8205 (ISSN) 2041-8213 (eISSN)

Vol. 782 1 6- L2

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1088/2041-8205/782/1/l2