NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
The Host Galaxies of Type Ia Supernovae Discovered by the Palomar Transient FactoryWe present spectroscopic observations of the host galaxies of 82 low-redshift type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory (PTF). We determine star-formation rates, gas-phase stellar metallicities, and stellar masses and ages of these objects. As expected, strong correlations between the SN Ia light-curve width (stretch) and the host age mass metallicity are found: fainter, faster-declining events tend to be hosted by older massive metal-rich galaxies. There is some evidence that redder SNe Ia explode in higher metallicity galaxies, but we found no relation between the SN colour and host galaxy extinction based on the Balmer decrement, suggesting that the colour variation of these SNe does not primarily arise from this source. SNe Ia in higher-mass metallicity galaxies also appear brighter after stretch colour corrections than their counterparts in lower mass hosts, and the stronger correlation is with gas-phase metallicity suggesting this may be the more important variable. We also compared the host stellar mass distribution to that in galaxy targeted SN surveys and the high-redshift untargeted Supernova Legacy Survey (SNLS). SNLS has many more low mass galaxies, while the targeted searches have fewer. This can be explained by an evolution in the galaxy stellar mass function, coupled with a SN delay-time distribution proportional to t1. Finally, we found no significant difference in the mass--metallicity relation of our SN Ia hosts compared to field galaxies, suggesting any metallicity effect on the SN Ia rate is small.
Document ID
20150011670
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Pan, Y.-C. (Oxford Univ. Oxford, United Kingdom)
Sullivan, M. (Southampton Univ. United Kingdom)
McGuire, K. (Oxford Univ. Oxford, United Kingdom)
Hook, I. M. (National Inst. for Astrophysics Astronomical Observatory (INAF) Trieste, Italy)
Nugent, P. E. (California Univ. Berkeley, CA, United States)
Howell, D. A. (Las Cumbres Observatory Global Telescope Network, Inc. Goleta, CA, United States)
Arcavi, I. (Weizmann Inst. of Science Rehovot, Israel)
Botyanszki, J. (California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Cenko, Stephen Bradley (NASA Goddard Space Flight Center Greenbelt, MD United States)
DeRose, J. (California Univ. Berkeley, CA, United States)
Date Acquired
June 26, 2015
Publication Date
January 1, 2013
Publication Information
Publisher: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN23288
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
host
transient
factory

Related Records

There are no records associated with this record.
No Preview Available