2005-10-16 Bing Jiang, Astronomy Department, NJU 1 Progenitors of SN Ia : Circumstellar Interaction,...
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Transcript of 2005-10-16 Bing Jiang, Astronomy Department, NJU 1 Progenitors of SN Ia : Circumstellar Interaction,...
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)
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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