Table · dataset · 2023
Opt. phot. & sp. for the type Iax SN 2021fcg
Listed in IVOA Registry (Virtual Observatory)
We present the discovery of ZTF 21aaoryiz/SN 2021fcg-an extremely low luminosity Type Iax supernova.
Description
SN 2021fcg was discovered by the Zwicky Transient Facility in the star-forming galaxy IC0512 at a distance of ~27Mpc. It reached a peak absolute magnitude of M_r_=-12.66+/-0.20mag, making it the least luminous thermonuclear supernova discovered to date.
The E(B-V) contribution from the underlying host galaxy is unconstrained. However, even if it were as large as 0.5mag, the peak absolute magnitude would be M_r_=-13.78+/-0.20mag-still consistent with being the lowest-luminosity SN. Optical spectra of SN 2021fcg taken at 37 and 65 days post-maximum show strong [CaII], CaII, and NaID emission and several weak [FeII] emission lines.
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The [CaII] emission in the two spectra has extremely low velocities of ~1300 and 1000km/s, respectively. The spectra very closely resemble those of the very low luminosity Type Iax supernovae SN2008ha, SN2010ae, and SN2019gsc taken at similar phases. The peak bolometric luminosity of SN2021fcg is ~2.5_-0.3_^+1.5^x10^40^erg/s, which is a factor of 3 lower than that for SN2008ha.
The bolometric lightcurve of SN2021fcg is consistent with a very low ejected nickel mass (M_Ni_~0.8_-0.5_^+0.4^x10^-3^M_{sun}_). The low luminosity and nickel mass of SN2021fcg pose a challenge to the picture that low-luminosity SNe Iax originate from deflagrations of near-Mch hybrid carbon-oxygen-neon white dwarfs. Instead, the merger of a carbon-oxygen and oxygen-neon white dwarf is a promising model to explain SN2021fcg.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/921/L6 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021ApJ...921L...6K ui.adsabs.harvard.edu/abs/2021ApJ...921L...6K ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/apj/921/l6 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/921/l6 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |