@article{4cda5bb576bf41e1b261fc40c446f130,
title = "The host galaxies of type Ia supernovae discovered by the palomar transient factory",
abstract = "We present spectroscopic observations of the host galaxies of 82 low-redshift Type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory.We determine star formation rates, gas-phase/stellarmetallicities, and stellarmasses 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 an SN delay-time distribution proportional to t-1. 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.",
keywords = "Cosmology: observations, Distance scale, Supernovae: general",
author = "Pan, {Y. C.} and M. Sullivan and K. Maguire and Hook, {I. M.} and Nugent, {P. E.} and Howell, {D. A.} and I. Arcavi and J. Botyanszki and Cenko, {S. B.} and J. DeRose and Fakhouri, {H. K.} and A. Gal-Yam and E. Hsiao and Kulkarni, {S. R.} and Laher, {R. R.} and C. Lidman and J. Nordin and Walker, {E. S.} and D. Xu",
note = "Royal Society; EU; ERC; ISF; BSF; Minerva ARCHES award; Kimmel award; W.M. Keck FoundationMS acknowledges support from the Royal Society. AG acknowledges support from the EU/FP7 via and ERC grant, funding from the ISF and BSF, and the Minerva ARCHES and Kimmel awards.Based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministerio da Ciencia, Tecnologia e Inovacao (Brazil) and Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina). Based on Gemini progammes GN-2010B-Q-111, GS-2010B-Q-82, GN-2011A-Q-82, GN-2011B-Q-108, GN-2012A-Q-91, GS-2012A-Q3, GN-2012B-Q-122 and GS-2012B-Q-83 for the host galaxy observations, and GN-2010A-Q-20, GN-2010B-Q-13, GN-2011A-Q-16 and GS-2009B-Q-11 for the SN observations. The William Herschel Telescope is operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. Observations obtained with the Samuel Oschin Telescope at the Palomar Observatory as part of the PTF project, a scientific collaboration between the California Institute of Technology, Columbia University, Las Cumbres Observatory, the Lawrence Berkeley National Laboratory, the National Energy Research Scientific Computing Center, the University of Oxford and the Weizmann Institute of Science. Some of the data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. Based",
year = "2014",
month = mar,
doi = "10.1093/mnras/stt2287",
language = "الإنجليزيّة",
volume = "438",
pages = "1391--1416",
journal = "MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",
}