eprintid: 10095549
rev_number: 14
eprint_status: archive
userid: 608
dir: disk0/10/09/55/49
datestamp: 2020-08-21 10:13:20
lastmod: 2021-11-08 00:14:41
status_changed: 2020-08-21 10:13:20
type: article
metadata_visibility: show
creators_name: Ercolano, B
creators_name: Barlow, MJ
creators_name: Sugerman, BEK
title: Dust yields in clumpy supernova shells: SN 1987A revisited
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
keywords: supernovae: individual: SN 1987A
note: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: We present a study of the effects of clumping on the emergent spectral energy distribution (SED) from dusty supernova (SN) shells illuminated by a diffuse radiation source distributed throughout the medium. These models are appropriate for Type II SNe older than a few hundred days, when the energy input is dominated by γ-rays from 56Co decay.

The fully 3D radiation transport problem is solved using a Monte Carlo code, MOCASSIN, and we present a set of models aimed at investigating the sensitivity of the SEDs to various clumping parameters. We find that, contrary to the predictions of analytical prescriptions, the combination of an optical and infrared (IR) observational data set is sufficient to constrain dust masses even in the case where optically thick clumps are present.

Using both smoothly varying and clumped grain density distributions, we obtain new estimates for the mass of dust condensed by the Type II SN 1987A by fitting the optical and IR spectrophotometric data of Wooden et al. at two epochs (day 615 and day 775). When using amorphous carbon grains, our best fits to the observational data imply that about 2.0 × 10−4 M⊙ of dust had condensed in the envelope of SN 1987A by day 615 and between 2.0 × 10−4 and 4.2 × 10−3 M⊙ by day 775. We find that the absence of a silicate emission or absorption feature in the observed mid-IR spectra implies that no more than 15 per cent of the dust formed around SN 1987A can have been in the form of silicate particles. Our models require larger dust masses for the case of graphite grains, namely between 4.2 × 10−4 and 6.6 × 10−4 M⊙ at day 615 and between 4.5 × 10−4 and 7.5 × 10−4 M⊙ at day 775. From our numerical models, we derive dust masses for SN 1987A that are comparable to previous analytic clumped graphite grain mass estimates, and at least two orders of magnitude below the 0.1–0.3 M⊙ that have been predicted to condense as dust grains in primordial core-collapse SN ejecta. This low condensation efficiency for SN 1987A is in contrast to the case of SN 2003gd, for which a dust condensation efficiency as large as 0.12 has recently been estimated.
date: 2007-03
date_type: published
publisher: WILEY-BLACKWELL
official_url: https://doi.org/10.1111/j.1365-2966.2006.11336.x
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 243872
doi: 10.1111/j.1365-2966.2006.11336.x
lyricists_name: Barlow, Michael
lyricists_id: MJBAR75
actors_name: Barlow, Michael
actors_id: MJBAR75
actors_role: owner
full_text_status: public
publication: Monthly Notices of the Royal Astronomical Society
volume: 375
number: 3
pagerange: 753-763
pages: 11
issn: 0035-8711
citation:        Ercolano, B;    Barlow, MJ;    Sugerman, BEK;      (2007)    Dust yields in clumpy supernova shells: SN 1987A revisited.                   Monthly Notices of the Royal Astronomical Society , 375  (3)   pp. 753-763.    10.1111/j.1365-2966.2006.11336.x <https://doi.org/10.1111/j.1365-2966.2006.11336.x>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10095549/1/ercolano_SN1987A_07mnras.pdf