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CARBON MONOXIDE IN THE COLD DEBRIS OF SUPERNOVA 1987A

J. Kamenetzky ; R. McCray ; R. Indebetouw ; M. J. Barlow ; M. Matsuura ; M. Baes ; Jadl Blommaert ; A. Bolatto ; L. Decin ; L. Dunne ; C. Fransson ; J. Glenn ; H. L. Gomez ; M. A. T. Groenewegen ; R. Hopwood ; R. P. Kirshner ; M. Lakicevic ; J. Marcaide ; Ivan Marti-Vidal (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; M. Meixner ; P. Royer ; A. Soderberg ; G. Sonneborn ; L. Staveley-Smith ; B. M. Swinyard ; G. Van de Steene ; P. A. M. van Hoof ; J. T. van Loon ; J. Yates ; G. Zanardo
Astrophysical Journal Letters (2041-8205). Vol. 773 (2013), 2,
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: ISM: supernova remnants, supernovae: individual (SN1987A), sn 1987a, 3-dimensional structure, ejecta, cassiopeia, sn-1987a, remnant, wavelength, instrument, facility



Denna post skapades 2013-10-30. Senast ändrad 2017-02-27.
CPL Pubid: 185863

 

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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium (2010-2017)

Ämnesområden

Astronomi, astrofysik och kosmologi

Chalmers infrastruktur