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DISCOVERY OF MOLECULAR HYDROGEN IN SN 1987A
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-0065-2933
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2016 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 821, no 1, L5Article in journal (Refereed) Published
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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
Institute of Physics Publishing , 2016. Vol. 821, no 1, L5
Keyword [en]
molecular processes, supernovae: general, supernovae: individual (SN 1987A)
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-185973DOI: 10.3847/2041-8205/821/1/L5ISI: 000373812000005Scopus ID: 2-s2.0-84964264800OAI: oai:DiVA.org:kth-185973DiVA: diva2:926562
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QC 20160509

Available from: 2016-05-09 Created: 2016-04-29 Last updated: 2016-05-09Bibliographically approved

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