Type Ia SN2016ije photometry and sp. follow-up

We have conducted photometric and spectroscopic observations of the peculiar Type Ia supernova (SN Ia) 2016ije that was discovered through the Tsinghua-NAOC Transient Survey. This peculiar object exploded in the outskirts of a metal-poor, low-surface brightness galaxy (i.e., M_g_=-14.5mag). Our photometric analysis reveals that SN 2016ije is subluminous (M_B,max_=-17.65+/-0.06mag) but exhibits relatively broad light curves ({Delta}m_15_(B)=1.35+/-0.14mag), similar to the behavior of SN 2002es. Our analysis of the bolometric light curve indicates that only 0.14+/-0.04M_{sun}_ of ^56^Ni was synthesized in the explosion of SN 2016ije, which suggests a less energetic thermonuclear explosion when compared to normal SNe Ia, and this left a considerable amount of unburned materials in the ejecta. Spectroscopically, SN2016ije resembles other SN 2002es-like SNe Ia, except that the ejecta velocity inferred from its carbon absorption line (~4500km/s) is much lower than that from silicon lines (~8300km/s) at around the maximum light. Additionally, most of the absorption lines are broader than other 02es-like SNe Ia. These peculiarities suggest the presence of significant unburned carbon in the inner region and a wide line-forming region along the line of sight. These characteristics suggest that SN 2016ije might originate from the violent merger of a white dwarf binary system, when viewed near an orientation along the iron-group-element cavity caused by the companion star.

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/950/17
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/950/17
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/950/17
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/950/17
Provenance
Creator Li Z.; Zhang T.; Wang X.; Zhang J.; Galbany L.; Filippenko A.V.,Brink T.G.; Ashall C.; Zheng W.; de Jaeger T.; Ragosta F.; Deckers M.,Gromadzki M.; Young D.R.; Xi G.; Chen J.; Zhao X.; Sai H.; Yan S.,Xiang D.; Chen Z.; Li W.; Wang Bo; Zou Hu; Sui J.; Wang J.; Ma J.; Nie J.,Xue S.; Zhou Xu; Zhou Z.
Publisher CDS
Publication Year 2025
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy