2005-10-16 Bing Jiang, Astronomy Department, NJU 1

Progenitors of SN Ia : CircumstProgenitors of SN Ia : Circumstellar ellar Interaction, Rotation, and StInteraction, Rotation, and Steadyeady Hydrogen BurningHydrogen BurningNomoto, Suzuki, Deng, J.S., Uenishi & HachisNomoto, Suzuki, Deng, J.S., Uenishi & Hachis

uuastro-ph/0603432astro-ph/0603432

Published in "1604-2004: Supernovae as Cosmological Lighthouses", ASP Conf. Ser. 342, (ASP), 105-1

14 (2005)

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

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

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

2005-10-16 Bing Jiang, Astronomy Department, NJU 5

The circumstellar interaction in SN 2002ic Possible progenitor system of it

The paper focus on

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?

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)

2005-10-16 Bing Jiang, Astronomy Department, NJU 8

SN 2002ic

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

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 Vw up to 2000 km/s

CSM interaction of SN Ia

2005-10-16 Bing Jiang, Astronomy Department, NJU 11

Nomoto’s calulation

Assuming: eject: W7, E=1.3*1

0^51 erg density: ρ=ρo(r/Ro)-

n g/cm^3 M(CSM) ~ 1.3 Msun CSM->aspherical

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

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

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