Change search
ReferencesLink to record
Permanent link

Direct link
Optical and near-infrared observations of SN 2014ck: an outlier among the Type Iax supernovae
Show others and affiliations
Number of Authors: 21
2016 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 459, no 1, 1018-1038 p.Article in journal (Refereed) Published
Abstract [en]

We present a comprehensive set of optical and near-infrared (NIR) photometric and spectroscopic observations for SN 2014ck, extending from pre-maximum to six months later. These data indicate that SN 2014ck is photometrically nearly identical to SN 2002cx, which is the prototype of the class of peculiar transients named SNe Iax. Similar to SN 2002cx, SN 2014ck reached a peak brightness M-B = -17.37 +/- 0.15 mag, with a post-maximum decline rate Delta m(15)(B) = 1.76 +/- 0.15 mag. However, the spectroscopic sequence shows similarities with SN 2008ha, which was three magnitudes fainter and faster declining. In particular, SN 2014ck exhibits extremely low ejecta velocities, similar to 3000 km s(-1) at maximum, which are close to the value measured for SN 2008ha and half the value inferred for SN 2002cx. The bolometric light curve of SN 2014ck is consistent with the production of 0.10(-0.03)(+0.04) M-circle dot of Ni-56. The spectral identification of several iron-peak features, in particular Co II lines in the NIR, provides a clear link to SNe Ia. Also, the detection of narrow Si, S and C features in the pre-maximum spectra suggests a thermonuclear explosion mechanism. The late-phase spectra show a complex overlap of both permitted and forbidden Fe, Ca and Co lines. The appearance of strong [Ca II] lambda lambda 7292, 7324 again mirrors the late-time spectra of SN 2008ha and SN 2002cx. The photometric resemblance to SN 2002cx and the spectral similarities to SN 2008ha highlight the peculiarity of SN 2014ck, and the complexity and heterogeneity of the SNe Iax class.

Place, publisher, year, edition, pages
2016. Vol. 459, no 1, 1018-1038 p.
Keyword [en]
supernovae: general, supernovae: individual: SN 2014ck, supernovae: individual: SN 2006fp, galaxies: individual: UGC 12182
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-132042DOI: 10.1093/mnras/stw696ISI: 000376386600076OAI: diva2:949446
Available from: 2016-07-19 Created: 2016-07-06 Last updated: 2016-07-19Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Taddia, Francesco
By organisation
Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
In the same journal
Monthly notices of the Royal Astronomical Society
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 2 hits
ReferencesLink to record
Permanent link

Direct link