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Evidence for an asymptotic giant branch star in the progenitor system of a type Ia supernova

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arxiv astro-ph/0306270 v2 pith:7RKSFO2B submitted 2003-06-12 astro-ph

Mario Hamuy , M. M. Phillips , Nicholas B. Suntzeff , Jose Maza , L. E. Gonzalez , Miguel Roth , Kevin Krisciunas , Nidia Morrell
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E. M. Green S. E. Persson P. J. McCarthy
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keywords beenprogenitortypeasymptoticbranchelementsexplodinggiant
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A type Ia supernova (SN Ia), one of the two main classes of exploding stars, is recognized by the absence of hydrogen and the presence of elements such as silicon and sulphur in its spectra. These explosions are thought to produce the majority of iron-peak elements in the universe and are known to be precise "standard candles" used to measure distances to galaxies. While there is general agreement that SNe Ia are exploding white dwarfs, astronomers face the embarassing problem that the progenitor systems have never been directly observed. Significant effort has been put into the detection of circum-stellar material (CSM) in order to discriminate between the different types of possible progenitors systems, yet no CSM has been found. Here we report optical observations of SN 2002ic which reveal large amounts of CSM seen as a strong hydrogen emission. This observation suggests that the progenitor system contained a massive asymptotic branch giant star which lost a few solar masses of hydrogen-rich gas prior to the type Ia explosion.

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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Optical observations on the young Type Ia SN 2021fxy with detached high velocity features

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    In SN 2021fxy, the high-velocity Si II λ6355 absorption declines as roughly t^−0.1, much shallower than the t^−0.22 expected from standard outer ejecta, pointing to detached density structures.

  2. The type Ia supernova 2023vjh: a peculiar 1991bg-like SN with unusually faint light curves

    astro-ph.HE 2026-07 accept novelty 5.0 of 10

    SN 2023vjh is an unusually faint 91bg-like SN Ia whose light curves and colors suggest possible CSM extinction despite minimal host interstellar dust signatures.

  3. Supernovae with the Square Kilometre Array

    astro-ph.HE 2026-06 unverdicted novelty 3.0 of 10

    This review chapter updates prior work to outline the SKA's expected role in turning radio observations of supernovae into population statistics through wide-field surveys and targeted follow-up.

  4. Type Ia supernovae

    astro-ph.HE 2024-11 unverdicted

    A review of Type Ia supernovae covering their physics, observational diversity, progenitor scenarios, and open questions, with no new research results.

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