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Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 6
2016 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 821, no 1, L5Article in journal (Refereed) Published
Abstract [en]

Both CO and SiO have been observed at early and late phases in SN 1987A. H-2 was predicted to form at roughly the same time as these molecules, but was not detected at early epochs. Here, we report the detection of NIR lines from H-2 at 2.12 and 2.40 mu m in VLT/SINFONI spectra obtained between days 6489 and 10,120. The emission is concentrated to the core of the SN in contrast to Ha and approximately coincides with the [Si I]/[Fe II] emission detected previously in the ejecta. Different excitation mechanisms and power sources of the emission are discussed. From the nearly constant H-2 luminosities, we favor excitation resulting from the Ti-44 decay.

Place, publisher, year, edition, pages
2016. Vol. 821, no 1, L5
Keyword [en]
molecular processes, supernovae: general, supernovae: individual (SN 1987A)
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-130174DOI: 10.3847/2041-8205/821/1/L5ISI: 000373812000005OAI: diva2:927146
Available from: 2016-05-11 Created: 2016-05-09 Last updated: 2016-05-11Bibliographically approved

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Fransson, Claes
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Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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