Table · dataset · 2024
Multiepoch opt. obs. of 91T/99aa-like SNe Ia
Listed in IVOA Registry (Virtual Observatory)
We present the photometry of 16 91T/99aa-like Type Ia Supernovae (SNeIa) observed by the Las Cumbres Observatory.
Description
We also use an additional set of 21 91T/99aa-like SNe Ia and 87 normal SNe Ia from the literature for an analysis of the standardizability of the luminosity of 91T/99aa-like SNe. We find that 91T/99aa-like SNe are 0.2mag brighter than normal SNe Ia, even when fully corrected by the light-curve shapes and colors.
The weighted rms of the 91T/99aa-like SNe (with z_CMB_>0.01) Hubble residuals is 0.25+/-0.03mag, suggesting that 91T/99aa-like SNe are also excellent relative distance indicators to +/-12%. We compare the Hubble residuals with the pseudo-equivalent width (pEW) of SiII{lambda}{lambda}6355 around the date of maximum brightness. We find that there is a broken linear correlation between those two measurements for our sample including both 91T/99aa-like and normal SNe Ia.
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As the pEW_max_(SiII{lambda}{lambda}6355) increases, the Hubble residual increases when pEW_max_(SiII{lambda}{lambda}6355)<55.6{AA}. However, the Hubble residual stays constant beyond this. Given that 91T/99aa-like SNe possess shallower SiII lines than normal SNe Ia, the linear correlation at pEW_max_(SiII{lambda}{lambda}6355)<55.6{AA} can account for the overall discrepancy of Hubble residuals derived from the two subgroups.
Such a systematic effect needs to be taken into account when using SNe Ia to measure luminosity distances.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/938/83 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022ApJ...938...83Y ui.adsabs.harvard.edu/abs/2022ApJ...938...83Y ↗
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/938/83 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 71%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/938/83 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (71%) |
| 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 |