Time-varying Extinction, Polarization, and Colors of Type Ia Supernovae due to Rotational Disruption of Dust Grains
نویسندگان
چکیده
منابع مشابه
Dust around Type Ia supernovae
An explanation is given of the low value of Rλ ≡ Aλ/E(B − V ), the ratio of absolute to selective extinction deduced from Type Ia supernova observations. The idea involves scattering by dust clouds located in the circumstellar environment, or at the highest velocity shells of the supernova ejecta. The scattered light tends to reduce the effective Rλ in the optical, but has an opposite effect in...
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Estimates of the cosmic star formation rate and of cluster metallicities independently imply that at z ∼< 0.5 the gas in the universe has substantial average metallicity: 1/10 ∼< Z/Z⊙ ∼< 1/3 for Ωgas = 0.05. This metal density probably cannot be contained in known solar-metallicity galaxies of density parameter Ω∗ ≈ 0.004, implying significant enrichment of the intergalactic medium (IGM) by eje...
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چکیده ندارد.
Evolving to type Ia supernovae with long delay time
Recent investigations on the delay time of type Ia supernovae have set useful constraints on the progenitors of type Ia supernovae. Here we have calculated the evolution of close binaries consisting of a white dwarf and a main-sequence or subgiant companion. We assume that, once Roche lobe overflow occurs a small fraction of the lost mass from the system forms a circumbinary disk, which extract...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2020
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab5d37