The Evolution of the Type Ia Supernova Luminosity Function
arXiv:1710.09384 · doi:10.3847/2041-8213/aaa015
Abstract
Type Ia supernovae (SNe Ia) exhibit a wide diversity of peak luminosities and light curve shapes: the faintest SNe Ia are 10 times less luminous and evolve more rapidly than the brightest SNe Ia. Their differing characteristics also extend to their stellar age distributions, with fainter SNe Ia preferentially occurring in old stellar populations and vice versa. In this Letter, we quantify this SN Ia luminosity - stellar age connection using data from the Lick Observatory Supernova Search (LOSS). Our binary population synthesis calculations agree qualitatively with the observed trend in the >1 Gyr-old populations probed by LOSS if the majority of SNe Ia arise from prompt detonations of sub-Chandrasekhar mass white dwarfs (WDs) in double WD systems. Under appropriate assumptions, we show that double WD systems with less massive primaries, which yield fainter SNe Ia, interact and explode at older ages than those with more massive primaries. We find that prompt detonations in double WD systems are capable of reproducing the observed evolution of the SN Ia luminosity function, a constraint that any SN Ia progenitor scenario must confront.
Accepted for publication in ApJL. Minor changes to previous version for clarity. Data used to construct the observational CDFs in Figure 4 are available in an ancillary file
References in corpus (14)
- Rates and properties of type Ia supernovae as a function of mass and star-formation in their host galaxies
- CfA3: 185 Type Ia Supernova Light Curves from the CfA
- Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries
- SDSS-IV MaNGA: Spatially resolved star formation histories in galaxies as a function of galaxy mass and type
- Revisiting the Lick Observatory Supernova Search Volume-Limited Sample: Updated Classifications and Revised Stripped-Envelope Supernova Fractions
- LOSS Revisited - II: The relative rates of different types of supernovae vary between low- and high-mass galaxies
- He-Accreting WDs: accretion regimes and final outcomes
- Every interacting double white dwarf binary may merge
- Evidence for sub-Chandrasekhar-mass progenitors of Type Ia supernovae at the faint end of the width-luminosity relation
- Light and color curve properties of type Ia supernovae: Theory vs. Observations
- LOSS Revisited - I: Unraveling correlations between supernova rates and galaxy properties, as measured in a reanalysis of the Lick Observatory Supernova Search
- The binary fraction, separation distribution, and merger rate of white dwarfs from SPY
- On the evolution of rotating accreting white dwarfs and type Ia supernovae
- Searching for giga-Jansky fast radio bursts from the Milky Way with a global array of low-cost radio receivers