CARBON MONOXIDE IN THE COLD DEBRIS OF SUPERNOVA 1987A
Artikel i vetenskaplig tidskrift, 2013
We report spectroscopic and imaging observations of rotational transitions of cold CO and SiO in the ejecta of SN1987A, the first such emission detected in a supernova remnant. In addition to line luminosities for the CO J = 1-0, 2-1, 6-5, and 7-6 transitions, we present upper limits for all other transitions up to J = 13-12, collectively measured from the Atacama Large Millimeter Array, the Atacama Pathfinder EXperiment, and the Herschel Spectral and Photometric Imaging REceiver. Simple models show the lines are emitted from at least 0.01 M-circle dot of CO at a temperature >14 K, confined within at most 35% of a spherical volume expanding at similar to 2000 km s(-1). Moreover, we locate the emission within 1 '' of the central debris. These observations, along with a partial observation of SiO, confirm the presence of cold molecular gas within supernova remnants and provide insight into the physical conditions and chemical processes in the ejecta. Furthermore, we demonstrate the powerful new window into supernova ejecta offered by submillimeter observations.
facility
sn 1987a
supernovae: individual (SN1987A)
cassiopeia
wavelength
ISM: supernova remnants
remnant
ejecta
sn-1987a
instrument
3-dimensional structure
Författare
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Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 773 2 L34Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
DOI
10.1088/2041-8205/773/2/l34