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Progenitors of SN Ia: Circumstellar Interaction, Rotation, and Steady Hydrogen Burning

This article discusses the progenitor systems of Type Ia supernovae, focusing on circumstellar interactions, rotation effects, and steady hydrogen burning. It explores controversial issues and possible scenarios for SN 2002ic, the first SN Ia showing evidence of Chandra Sekhar mass progenitors. Key points include CSM interactions, possible progenitor systems, and Nomoto's calculations.

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Progenitors of SN Ia: Circumstellar Interaction, Rotation, and Steady Hydrogen Burning

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

  3. Type Ia as a empirical standard candle • 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 Bing Jiang,Astronomy Department, NJU

  4. Controversial issues • 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 Bing Jiang,Astronomy Department, NJU

  5. The paper focus on • The circumstellar interaction in SN 2002ic • Possible progenitor system of it 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? 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) Bing Jiang,Astronomy Department, NJU

  8. SN 2002ic Bing Jiang,Astronomy Department, NJU

  9. SN 2002ic • 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 Bing Jiang,Astronomy Department, NJU

  10. CSM interaction of SN Ia • 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 Bing Jiang,Astronomy Department, NJU

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

  12. Possible progenitors of SN 2002ic • 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 Bing Jiang,Astronomy Department, NJU

  13. Possible progenitors of SN 2002ic • 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 Bing Jiang,Astronomy Department, NJU

  14. Thank you! Bing Jiang,Astronomy Department, NJU

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