CORDIS
EU research results

CORDIS

English EN

Supernova dust: production and survival rates

Objective

The dust content of galaxies is dominated by silicate and carbon grains, whose origin is the subject of much debate - are the dust grains provided mainly by red giant stars, by supernovae from massive stars, or can they grow in the interstellar medium itself from stardust seeds? My team's recent observations with Herschel of three supernova remnants, Cas A, SN 1987A and the Crab Nebula, have provided direct evidence that supernovae from massive stars can form dust masses in the range of 0.1-0.8 solar masses per event, a level at which dust evolution models for high and low redshift galaxies predict that supernovae can become the dominant contributors of dust. With both O-rich and C-rich shells, core-collapse supernovae can make both silicate and carbon particles, as observed. Most of SN 1987A's current dust mass of 0.6-0.8 solar masses appears to have been grown between 3 and 25 years after outburst, a period that is currently poorly observed for other remnants. To build on and to extend these results beyond our initial sample of three core-collapse objects, dust masses will be measured for a much larger sample of late-epoch (3-50 yrs post-outburst) supernova remnants. This will be done by using a new Monte Carlo line transfer code to model red-blue line profile asymmetries observed in 8m telescope optical spectra to derive dust masses at a range of epochs, and via JWST mid-infrared observations of SN dust emission as the dust cools. We will extend our dust and gas emission modelling code to include dust heating not just by radiation but also by particle impacts, in order to determine accurate dust masses for collisionally ionized supernova remnants covered by Herschel surveys of the Magellanic Clouds and Milky Way. The theory programme will also determine grain lifetimes against destruction by supernova remnant reverse shocks, accounting for shielding in clumps, as well as destruction lifetimes for dust in circumstellar shells impacted by supernova blast waves.
Leaflet | Map data © OpenStreetMap contributors, Credit: EC-GISCO, © EuroGeographics for the administrative boundaries

Host institution

UNIVERSITY COLLEGE LONDON

Address

Gower Street
Wc1e 6bt London

United Kingdom

Activity type

Higher or Secondary Education Establishments

EU Contribution

€ 2 498 535

Beneficiaries (1)

Sort alphabetically

Sort by EU Contribution

Expand all

UNIVERSITY COLLEGE LONDON

United Kingdom

EU Contribution

€ 2 498 535

Project information

Grant agreement ID: 694520

Status

Ongoing project

  • Start date

    1 June 2016

  • End date

    31 May 2021

Funded under:

H2020-EU.1.1.

  • Overall budget:

    € 2 498 535

  • EU contribution

    € 2 498 535

Hosted by:

UNIVERSITY COLLEGE LONDON

United Kingdom