Sub-Chandrasekhar progenitors for Type Ia SNe Virtual Observatory Resource

Authors
  1. Flors A.
  2. Spyromilio J.
  3. Taubenberger S.
  4. Blondin S.
  5. Cartier R.,Leibundgut B.
  6. Dessart L.
  7. Dhawan S.
  8. Hillebrandt W.
  9. Published by
    CDS
Abstract

A non-local-thermodynamic-equilibrium level population model of the first and second ionization stages of iron, nickel, and cobalt is used to fit a sample of XShooter optical + near-infrared (NIR) spectra of Type Ia supernovae (SNe Ia). From the ratio of the NIR lines to the optical lines limits can be placed on the temperature and density of the emission region. We find a similar evolution of these parameters across our sample. Using the evolution of the FeII 12570-7155{AA} line as a prior in fits of spectra covering only the optical wavelengths we show that the 7200{AA} feature is fully explained by [FeII] and [NiII] alone. This approach allows us to determine the abundance of NiII/FeII for a large sample of 130 optical spectra of 58 SNe Ia with uncertainties small enough to distinguish between Chandrasekhar mass (M_Ch_) and sub-Chandrasekhar mass (sub-M_Ch_) explosion models. We conclude that the majority (85 per cent) of normal SNe Ia have a Ni/Fe abundance that is in agreement with predictions of sub-M_Ch_ explosion simulations of ~Z_{sun}_ progenitors. Only a small fraction (11 per cent) of objects in the sample have a Ni/Fe abundance in agreement with M_Ch_ explosion models.

Keywords
  1. Supernovae
  2. Optical astronomy
  3. Spectroscopy
  4. Infrared astronomy
  5. Chemically peculiar stars
Bibliographic source Bibcode
2020MNRAS.491.2902F
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/491/2902
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/491/2902

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/491/2902
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/491/2902
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/491/2902
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/491/2902/tableb1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/491/2902/tableb1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/491/2902/tableb1?

History

2023-04-27T15:28:40Z
Resource record created
2023-04-27T15:28:40Z
Created
2023-08-25T12:32:31Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr