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Title: Multidimensional Models of Type Ia Supernova Nebular Spectra: Strong Emission Lines from Stripped Companion Gas Rule Out Classic Single-degenerate Systems

Journal Article · · The Astrophysical Journal. Letters (Online)
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Florida State Univ., Tallahassee, FL (United States)

The classic single-degenerate model for the progenitors of Type Ia supernova (SN Ia) implies that the supernova ejecta should be enriched with solar-like abundance material stripped from the companion star. Spectroscopic observations of normal SNe Ia at late times, however, have not resulted in definite detection of hydrogen. In this Letter, we study line formation in SNe Ia at nebular times using non-LTE spectral modeling. We introduce, for the first time, multidimensional radiative transfer calculations of SNe Ia with stripped material mixed in the ejecta core, based on hydrodynamical simulations of ejecta–companion interaction. We suggest that interaction models with main-sequence companions produce significant Hα emission at late times, ruling out these types of binaries being viable progenitors of SNe Ia. We also predict significant He i line emission at optical and near-infrared wavelengths for both hydrogen-rich or helium-rich material, providing an additional observational probe of stripped ejecta. We produce models with reduced stripped masses and find a more stringent mass limit of Mst ≲ 1 × 10-4 M of stripped companion material for SN 2011fe.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-05CH11231; DGE1106400
OSTI ID:
1524169
Journal Information:
The Astrophysical Journal. Letters (Online), Vol. 852, Issue 1; ISSN 2041-8213
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Cited By (23)

Monte Carlo radiative transfer journal June 2019
Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program journal November 2018
Detection of circumstellar helium in Type Iax progenitor systems journal May 2019
ASASSN-18tb: a most unusual Type Ia supernova observed by TESS and SALT journal May 2019
Circumstellar properties of Type Ia supernovae from the helium star donor channel journal August 2019
Exploring the shell model of high-velocity features of Type Ia supernovae using tardis journal January 2019
Monte Carlo radiative transfer for the nebular phase of Type Ia supernovae journal December 2019
i -process Contribution of Rapidly Accreting White Dwarfs to the Solar Composition of First-peak Neutron-capture Elements journal February 2018
Nebular Spectroscopy of the “Blue Bump” Type Ia Supernova 2017cbv journal August 2018
Interaction of Hemispherical Blast Waves with Inhomogeneous Spheres: Probing the Collision of a Supernova Ejecta with a Nearby Companion Star in the Laboratory journal January 2019
Variable H α Emission in the Nebular Spectra of the Low-luminosity Type Ia SN2018cqj/ATLAS18qtd journal January 2020
Nebular Spectroscopy of Kepler ’s Brightest Supernova journal January 2019
No Stripped Companion Material in the Nebular Spectrum of the “Two-Component” Type Ia Supernova ASASSN-18bt journal February 2019
Nebular H α Limits for Fast Declining SNe Ia journal May 2019
Evaporating Planets in SNe Ia journal October 2019
i-Process Contribution of Rapidly Accreting White Dwarfs to the Solar Composition of First-Peak Neutron-Capture Elements text January 2017
Carnegie Supernova Project-II: The Near-infrared Spectroscopy Program text January 2018
No Stripped Companion Material in the Nebular Spectrum of the "Two-Component" Type Ia Supernova ASASSN-18bt text January 2018
Interaction of hemispherical blast waves with inhomogeneous spheres: Probing the collision of a supernova ejecta with a nearby companion star in the laboratory preprint January 2018
Exploring the shell model of high-velocity features of Type Ia supernovae using TARDIS text January 2019
ASASSN-18tb: A Most Unusual Type Ia Supernova Observed by TESS and SALT text January 2019
Circumstellar properties of Type Ia supernovae from the helium star donor channel text January 2019
Evaporating Planets in SNe Ia text January 2019

Figures / Tables (5)


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