Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

SN2012ca: a stripped envelope core-collapse SN interacting with dense circumstellar medium

Inserra, C. ORCID:, Smartt, S. J., Scalzo, R., Fraser, M., Pastorello, A., Childress, M., Pignata, G., Jerkstrand, A., Kotak, R., Benetti, S., Della Valle, M., Gal-Yam, A., Mazzali, P., Smith, K., Sullivan, M., Valenti, S., Yaron, O., Young, D. and Reichart, D. 2013. SN2012ca: a stripped envelope core-collapse SN interacting with dense circumstellar medium. Monthly Notices of the Royal Astronomical Society - Letters 437 (1) , L51-L55. 10.1093/mnrasl/slt138

[thumbnail of slt138.pdf]
PDF - Published Version
Download (738kB) | Preview


We report optical and near-infrared observations of SN2012ca with the Public ESO Spectroscopy Survey of Transient Objects (PESSTO), spread over one year since discovery. The supernova (SN) bears many similarities to SN1997cy and to other events classified as Type IIn but which have been suggested to have a thermonuclear origin with narrow hydrogen lines produced when the ejecta impact a hydrogen-rich circumstellar medium (CSM). Our analysis, especially in the nebular phase, reveals the presence of oxygen, magnesium and carbon features. This suggests a core-collapse explanation for SN2012ca, in contrast to the thermonuclear interpretation proposed for some members of this group. We suggest that the data can be explained with a hydrogen- and helium-deficient SN ejecta (Type I) interacting with a hydrogen-rich CSM, but that the explosion was more likely a Type Ic core-collapse explosion than a Type Ia thermonuclear one. This suggests that two channels (both thermonuclear and stripped envelope core-collapse) may be responsible for these SN 1997cy-like events.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Blackwell Publishing Ltd
ISSN: 1745-3925
Date of First Compliant Deposit: 2 January 2019
Date of Acceptance: 1 October 2013
Last Modified: 06 May 2023 20:53

Citation Data

Cited 7 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics