1. 2005-10-16 Bing Jiang, Astronomy Department, NJU 1 Progenitors of SN Ia : Circumstellar Interaction, Rotation, and Steady Interaction, Rotation, and Steady Hydrogen Burning Hydrogen Burning Nomoto, Suzuki, Deng, J.S., Uenishi & Hachisu astro-ph/0603432 Nomoto, Suzuki, Deng, J.S., Uenishi & Hachisu astro-ph/0603432 Published in "1604-2004: Supernovae as Cosmological Lighthouses", ASP Conf. Ser. 342, (ASP), 105-114 (2005)

2. 2005-10-16 Bing Jiang, Astronomy Department, NJU 2 Most favoured scenario for Type Ia SN system Lack of H Prominent Si line near maximum light Thermonuclear exposion of accreting WD in binary surpassing Mch=1.44 Msun

3. 2005-10-16 Bing Jiang, Astronomy Department, NJU 3 Relatively uniform light curves and spectral evolution Redshift 0.1-1 Major sources of Fe in the galacitc and cosmic chemical evolution The exact progenitor system and its evolution have not been identified yet Type Ia as a empirical standard candle

4. 2005-10-16 Bing Jiang, Astronomy Department, NJU 4 Ch mass WD model vs. sub-Ch mass model DD model vs. SD model  DD: double degenerate (merging of double CO WDs)  SD: single degenerate  (Branch et al. 1995 for a review) Nomoto, Iben, Tutukov, Webbink, Branch, Renzini, King, Hachisu SN 2002ic: a SN Ia, but has H Hαemission Controversial issues

5. 2005-10-16 Bing Jiang, Astronomy Department, NJU 5 The circumstellar interaction in SN 2002ic Possible progenitor system of it The paper focus on

6. 2005-10-16 Bing Jiang, Astronomy Department, NJU 6 SN 2002ic Discover on 2002. 11.13 Hamuy, et al. 2003, Nature SN Ia Double component Hαemission =>SN IIn?

7. 2005-10-16 Bing Jiang, Astronomy Department, NJU 7 SN 2002ic Or some of SN IIn actually is SN Ia? SN 1997cy is among the most luminous SNe discovered so far, and is suspected to be related to a GRB(Germany et al., 2000)

8. 2005-10-16 Bing Jiang, Astronomy Department, NJU 8 SN 2002ic

9. 2005-10-16 Bing Jiang, Astronomy Department, NJU 9 Discover on 2002. 11.13 Hamuy, et al. 2003, Nature SN Ia Double component Hαemission =>SN IIn? Interaction between SN ejecta and a dense H-rich circumstellar medium(CSM) the first SN Ia to show direct evidence of CS gas ejected by the progenitor system SN 2002ic

10. 2005-10-16 Bing Jiang, Astronomy Department, NJU 10 Accretion wind in a SD model (Hachisu et al. 1996, 1999)  dot{M} up to 10^-4 Msun/yr  V w up to 2000 km/s CSM interaction of SN Ia

11. 2005-10-16 Bing Jiang, Astronomy Department, NJU 11 Nomoto’s calulation Assuming:  eject: W7, E=1.3*10^51 erg  density: ρ=ρ o (r/R o ) - n g/cm^3 M(CSM) ~ 1.3 Msun CSM->aspherical

12. 2005-10-16 Bing Jiang, Astronomy Department, NJU 12 Single star scenario: Type I+1/2 SNe in AGB stars whose CO core is close to Ch mass  Wind: AGB star  Aspherical CSM: pre-existing clumpy disk Binary scenario: typical WD-SD model  Wind: accretion wind  CSM is aspherical Possible progenitors of SN 2002ic

13. 2005-10-16 Bing Jiang, Astronomy Department, NJU 13 Merging WDs and rotation  calculation of the evolution of WDs with rotation in 1D  Piersanti et al. 2003 & Saio and Nomoto (2004) Surface Hydrogen Burning Models Possible progenitors of SN 2002ic

14. 2005-10-16 Bing Jiang, Astronomy Department, NJU 14