Bevan, A;
Barlow, MJ;
Milisavljevic, D;
(2017)
Dust masses in the ejecta of SN 1993J, SN 1987A, SN 1980K and Cas A from modelling their red-blue optical line prole asymmetries.
In:
Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society.
(pp. pp. 397-400).
Società Astronomica Italiana: Rome, Italy.
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Abstract
Newly-formed dust masses in the ejecta of core-collapse supernovae (CCSNe) have generally been inferred by fitting their near-IR and mid-IR SEDs yielding small dust mass estimates of <10− 3 M. However, observations of a few CCSNe in the far-IR by Herschel and ALMA have indicated far higher cold dust masses (0.1 – 1.0 M). If representative of the wider CCSN population, this could potentially account for the dust masses seen in the early Universe. Unfortunately, there are now few instruments capable of detecting CCSN far-IR dust emission so other techniques must be exploited. The late-time optical and near-IR line profiles of many core-collapse supernovae exhibit a red-blue asymmetry caused by red-shifted emission from the receding parts of the ejecta, which must traverse the dusty interior of the ejecta, experiencing greater extinction than the blue-shifted emission. We present Monte Carlo line transfer models of asymmetric optical line profiles in the late-time spectra of SN 1987A, SN 1980K, SN 1993J and Cas A using the new code (Bevan & Barlow, 2016). We derive dust mass estimates at late times of 0.08 – 0.18 M for SN 1993J, 0.12 – 0.3 M for SN 1980K and ∼1.1 M for Cas A. We also discuss a series of models of the [OI] and Hα line profiles for SN 1987A over a range of epochs. The derived dust masses as a function of epoch are consistent with continuous dust formation during the first few decades of ejecta evolution and final dust mass estimates of 0.4 – 0.7 M. We conclude that dust masses > ∼0.1M have formed in the ejecta of CCSNe supporting the case that they are the dominant sources of dust in the early Universe.
Type: | Proceedings paper |
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Title: | Dust masses in the ejecta of SN 1993J, SN 1987A, SN 1980K and Cas A from modelling their red-blue optical line prole asymmetries |
Event: | The AGB-Supernovae mass transition |
Open access status: | An open access version is available from UCL Discovery |
Publisher version: | http://sait.oat.ts.astro.it/ToC.htm |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Supernovae individual: SN 1980K, SN 1987A, SN 1993J, CasA - ISM: supernova remnants - radiative transfer |
UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
URI: | https://discovery.ucl.ac.uk/id/eprint/10078305 |
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