Supernovae and their host galaxies -- VII. The diversity of Type Ia supernova progenitors

Abstract

We present an analysis of the light curve (LC) decline rates $(\Delta m_{15})$ of 407 normal and peculiar supernovae (SNe) Ia and global parameters of their host galaxies. As previously known, there is a significant correlation between the $\Delta m_{15}$ of normal SNe Ia and global ages (morphologies, colours, masses) of their hosts. On average, those normal SNe Ia that are in galaxies from the Red Sequence (early-type, massive, old hosts) have faster declining LCs in comparison with those from the Blue Cloud (late-type, less massive, younger hosts) of the colour-mass diagram. The observed correlations between the $\Delta m_{15}$ of normal SNe Ia and hosts' parameters appear to be due to the superposition of at least two distinct populations of faster and slower declining normal SNe Ia from older and younger stellar components. We show, for the first time, that the $\Delta m_{15}$ of 91bg- and 91T-like SNe is independent of host morphology and colour. The distribution of hosts on the colour-mass diagram confirms the known tendency for 91bg-like SNe to occur in globally red/old galaxies while 91T-like events prefer blue/younger hosts. On average, the youngest global ages of 02cx-like SNe hosts and their positions in the colour-mass diagram hint that these events likely originate from young population, but they differ from 91T-like events in the LC decline rate. Finally, we discuss the possible explosion channels and present our favoured SN Ia models that have the potential to explain the observed SN-host relations.

17 pages, 9 figures, 13 tables, online data, accepted for publication in MNRAS

References in corpus (27)

• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• CfA3: 185 Type Ia Supernova Light Curves from the CfA
• The Evolution of Compact Binary Star Systems
• A Common Explosion Mechanism for Type Ia Supernovae
• The Spectroscopic Diversity of Type Ia Supernovae
• SkyMapper Southern Survey: Second Data Release (DR2)
• The role of minor mergers in the recent star formation history of early-type galaxies
• LOSS Revisited - II: The relative rates of different types of supernovae vary between low- and high-mass galaxies
• Ages of Type Ia Supernovae Over Cosmic Time
• Comprehensive Observations of the Bright and Energetic Type Iax SN 2012Z: Interpretation as a Chandrasekhar Mass White Dwarf Explosion
• Early-type Host Galaxies of Type Ia Supernovae. II. Evidence for Luminosity Evolution in Supernova Cosmology
• Progenitors of type Ia supernovae
• Lick Observatory Supernova Search Follow-Up Program: Photometry Data Release of 93 Type Ia Supernovae
• Slow-Speed Supernovae from the Palomar Transient Factory: Two Channels
• Supernovae and their host galaxies. I. The SDSS DR8 database and statistics
• Think Global, Act Local: The Influence of Environment Age and Host Mass on Type Ia Supernova Light Curves
• The Carnegie Supernova Project-I: Correlation Between Type Ia Supernovae and Their Host Galaxies from Optical to Near-Infrared Bands
• Early-type galaxies with core collapse supernovae
• Investigating the Diversity of Type Ia Supernova Spectra with the Open-Source Relational Database Kaepora
• Single-Degenerate Type Ia Supernovae Are Preferentially Overluminous
• The influence of Host Galaxies in Type Ia Supernova Cosmology
• Defining Photometric Peculiar Type Ia Supernovae
• The Evolution of the Type Ia Supernova Luminosity Function
• Supernovae and their host galaxies - V. The vertical distribution of supernovae in disc galaxies
• Normal type Ia supernovae from disruptions of hybrid He-CO white-dwarfs by CO white-dwarfs
• High-velocity feature as the indicator of the stellar population of Type Ia supernovae
• The physical properties of S0 galaxy PGC 26218: the origin of starburst and star formation

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