Ionisation loss and shock excitation of 44/20 Са I and 44/20 Са II atoms in cold remnants of type II supernovae

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dc.contributor.authorDoikov, D. N.
dc.contributor.authorAndrievsky, Serhii M.
dc.contributor.authorАндрієвський, Сергій Михайловичuk
dc.contributor.authorАндриевский, Сергей Михайлович
dc.date.accessioned2017-12-21T13:36:53Z
dc.date.available2017-12-21T13:36:53Z
dc.date.issued2017
dc.description.abstractThe light emission (“glow”) of cold dusty plasma of the remnant of SN1987A was confirmed by the Hubble Space Telescope observations on 7th January, 1995. In particular, Ca I and Ca II lines were recorded and identified in the spectrum of the supernova’s envelope. The period of complete hydrogen recombination in the remnant is 800 days. Thus, it is only radioactive decay that could be a primary source of the plasma light emission at the moment of observation. This paper describes the conditions of shock excitation and recombination of 44/20 Ca resulted from the decay of radioactive 44/20 Ti travelling in the remnant’s cold dust. The overionisation in the remnant resulted from the motion of the 44/20 Ca recoil nucleus, as well as its impact on the spectrum formation, was studied. It has been shown that the calcium lines are formed by the 44/20 Ca II ion in the inner layers of the remnant. We have reached the conclusion that the Ca I/Ca II lines strength ratio corresponds to the isotopic abundance ratio [44/20 Ca] /[44/20 Ca ] in type II supernova remnants.uk
dc.identifierDOI: http://dx.doi.org/10.18524/1810-4215.2017.30.118314
dc.identifier.citationOdessa Astronomical publications = Одесские астрономические публикации = Одеські астрономічні публікаціїuk
dc.identifier.urihttps://dspace.onu.edu.ua/handle/123456789/12240
dc.language.isoenuk
dc.publisherОдеський національний університет імені І. І. Мечниковаuk
dc.relation.ispartofseries;Vol. 30.
dc.subjectSN1987A remnantuk
dc.subjectradioactive elementsuk
dc.subjectspectroscopy of Ca I and Ca IIuk
dc.titleIonisation loss and shock excitation of 44/20 Са I and 44/20 Са II atoms in cold remnants of type II supernovaeuk
dc.typeArticleuk
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