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Type Ia Supernovae in the SDSS Stripe 82

Type Ia Supernovae in the SDSS Stripe 82. SDSS-KSG Workshop 2008. 2. 18-20 Du-Hwan Han and Changbom Park Kyungpook National University Korea Institute for Advanced Study. Progress report. SDSS Supernovae survey. Part of the SDSS-II project

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Type Ia Supernovae in the SDSS Stripe 82

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  1. Type Ia Supernovae in the SDSS Stripe 82 SDSS-KSG Workshop 2008. 2. 18-20 Du-Hwan Han and Changbom Park Kyungpook National University Korea Institute for Advanced Study Progressreport

  2. SDSS Supernovae survey Part of the SDSS-II project Aim to discover SN Ia in “redshift desert” from z=0.05 to 0.4 Well-calibrated photometry in multi-band. Extensive spectroscopic follow-up ARC, HET, MDM, Subaru, WHT, Keck, NMSU, …

  3. SDSS Supernovae survey Larger spatial volume than previous SN survey.southern equatorial Stripe 82. Repeat imaging during Fall month of 2005-2007

  4. Supernova Sample Distribution of SNe : total ~1,500 SNe SN Ia -- 148 in 2005, 332 till 2006, 497 till now

  5. Supernova Sample Distribution of SNe total ~1500 SNe 148 SN Ia in 2005332 SN Ia till 2006497 SN Ia till now

  6. Supernova Sample Host galaxies of Type Ia SNfrom photometric & spectroscopic catalogs 72 hosts overlapping with the Main galaxies in the Mr-z space

  7. (u-r) colorsimilar to the distribution of the Main galaxies of each type Slight preference of SN Ia for bluer galaxies Properties of Host Galaxy

  8. Properties of Host Galaxy (g-r) colorsimilar to the distribution of the Main galaxies of each type

  9. Properties of Host Galaxy Luminosity+ extinction+ K-correction SN Ia prefers galaxies with Mr ~ M*-0.5

  10. Properties of Host Galaxy Local density5th nearby galaxyΔv=±1000 km/s Definite preference of SN Ia for galaxiesin low density regions

  11. Properties of Host Galaxy Distance tothe nearest galaxy

  12. Summary SDSS-II Supernova Survey (Fall month of 2005-7)discovered about 500 SN Ia (now) Properties of Host galaxy -(u-r) & (g-r) color -Luminosity -Local density -Distance to r1 Future work- dependence of SN Ia properties on hosts and environment - analysis with additional SN Ia samples (2007) & luminous main galaxies (DR7)

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