Photometric properties of intermediate-redshift Type Ia supernovae observed by the Sloan Digital Sky Survey-II Supernova Survey
Journal Article
·
· Monthly Notices of the Royal Astronomical Society
- Univ. of Tokyo, Tokyo (Japan)
- Univ. of Tokyo, Tokyo (Japan); Univ. of Tokyo, Chiba (Japan)
- Univ. of Tokyo, Chiba (Japan)
- Millennium Institute of Astrophysics, Santiago (Chile); Univ. de Chile, Santiago (Chile)
- Nikon Corp., Kanagawa (Japan)
- Pennsylvania State Univ., University Park, PA (United States)
- Wayne State Univ., Detroit, MI (United States)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
We have analyzed multi-band light curves of 328 intermediate redshift (0.05 <= z < 0.24) type Ia supernovae (SNe Ia) observed by the Sloan Digital Sky Survey-II Supernova Survey (SDSS-II SN Survey). The multi-band light curves were parameterized by using the Multi-band Stretch Method, which can simply parameterize light curve shapes and peak brightness without dust extinction models. We found that most of the SNe Ia which appeared in red host galaxies (u - r > 2.5) don't have a broad light curve width and the SNe Ia which appeared in blue host galaxies (u - r < 2.0) have a variety of light curve widths. The Kolmogorov-Smirnov test shows that the colour distribution of SNe Ia appeared in red / blue host galaxies is different (significance level of 99.9%). We also investigate the extinction law of host galaxy dust. As a result, we find the value of Rv derived from SNe Ia with medium light curve width is consistent with the standard Galactic value. On the other hand, the value of Rv derived from SNe Ia that appeared in red host galaxies becomes significantly smaller. Furthermore, these results indicate that there may be two types of SNe Ia with different intrinsic colours, and they are obscured by host galaxy dust with two different properties.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1343972
- Report Number(s):
- FERMILAB-PUB--16-645-CD; arXiv:1610.06396; 1492947
- Journal Information:
- Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 2 Vol. 465; ISSN 0035-8711
- Publisher:
- Royal Astronomical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Constraining Temporal Oscillations of Cosmological Parameters Using SNe Ia
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