Nucleosynthesis in Supernovae.

Hoyle, F.; Fowler, William A.

doi:10.1086/146963

Cited by 846 publications

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“…Thermonuclear supernovae, also known as Type Ia supernovae (SN Ia), originate from the explosion of carbon-oxygen white dwarfs (WDs; Hoyle & Fowler 1960), and are among the most luminous events in the Universe. Consequently, SN Ia can be detected up to very large distances.…”

Section: Introductionmentioning

confidence: 99%

The white dwarf binary pathways survey – II. Radial velocities of 1453 FGK stars with white dwarf companions from LAMOST DR 4

Rebassa‐Mansergas¹,

Ren²,

Irawati³

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We present the second paper of a series of publications aiming at obtaining a better understanding regarding the nature of type Ia supernovae (SN Ia) progenitors by studying a large sample of detached F, G and K main sequence stars in close orbits with white dwarf companions (i.e. WD+FGK binaries). We employ the LAMOST (Large Sky Area Multi-Object Fibre Spectroscopic Telescope) data release 4 spectroscopic data base together with GALEX (Galaxy Evolution Explorer) ultraviolet fluxes to identify 1,549 WD+FGK binary candidates (1,057 of which are new), thus doubling the number of known sources. We measure the radial velocities of 1,453 of these binaries from the available LAMOST spectra and/or from spectra obtained by us at a wide variety of different telescopes around the globe. The analysis of the radial velocity data allows us to identify 24 systems displaying more than 3σ radial velocity variation that we classify as close binaries. We also discuss the fraction of close binaries among WD+FGK systems, which we find to be ∼10 per cent, and demonstrate that high-resolution spectroscopy is required to efficiently identify double-degenerate SN Ia progenitor candidates.

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Section: Introductionmentioning

confidence: 99%

The white dwarf binary pathways survey – II. Radial velocities of 1453 FGK stars with white dwarf companions from LAMOST DR 4

Rebassa‐Mansergas¹,

Ren²,

Irawati³

et al. 2017

Monthly Notices of the Royal Astronomical Society

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“…Type Ia Supernovae (SNe Ia) are thermonuclear detonations of carbon-oxygen white dwarfs (WDs; Hoyle & Fowler 1960). Six SN Ia scenarios are currently considered, with no consensus on even the leading scenario for SN Ia.…”

Section: Introductionmentioning

confidence: 99%

Type Ia supernova remnants: shaping by iron bullets

Tsebrenko

Soker

2015

Mon. Not. R. Astron. Soc.

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Using 2D numerical hydrodynamical simulations of type Ia supernova remnants (SNR Ia) we show that iron clumps few times denser than the rest of the SN ejecta might form protrusions in an otherwise spherical SNR. Such protrusions exist in some SNR Ia, e.g., SNR 1885 and Tycho. Iron clumps are expected to form in the deflagration to detonation explosion model. In SNR Ia where there are two opposite protrusions, termed 'ears, such as Kepler's SNR and SNR G1.9+0.3, our scenario implies that the dense clumps, or iron bullets, were formed along an axis. Such a preferred axis can result from a rotating white dwarf progenitor. If our claim holds, this offers an important clue to the SN Ia explosion scenario.

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“…Solar flares have a direct impact on space weather and implications for the human space flight programme. Solar flares tend to have a log normal distribution of energy, but the typical energy of large flares is about 10 33 ergs, which is a substantial fraction of the luminosity of the quiescent Sun in 1 s. Solar flares are the sudden deposition of magnetic energy into the heat and kinetic energy of associated plasma. The physics of this sudden transition is not well known, but presumably involves instabilities, i.e.…”

Section: Solar Flares and Flare Starsmentioning

confidence: 99%

Astrophysical explosions: from solar flares to cosmic gamma-ray bursts

Wheeler

2012

Phil. Trans. R. Soc. A.

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Astrophysical explosions result from the release of magnetic, gravitational or thermonuclear energy on dynamical time scales, typically the sound-crossing time for the system. These explosions include solar and stellar flares, eruptive phenomena in accretion discs, thermonuclear combustion on the surfaces of white dwarfs and neutron stars, violent magnetic reconnection in neutron stars, thermonuclear and gravitational collapse supernovae and cosmic gamma-ray bursts, each representing a different type and amount of energy release. This paper summarizes the properties of these explosions and describes new research on thermonuclear explosions and explosions in extended circumstellar media. Parallels are drawn between studies of terrestrial and astrophysical explosions, especially the physics of the transition from deflagration-to-detonation.

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Nucleosynthesis in Supernovae.

Cited by 846 publications

References 0 publications

The white dwarf binary pathways survey – II. Radial velocities of 1453 FGK stars with white dwarf companions from LAMOST DR 4

The white dwarf binary pathways survey – II. Radial velocities of 1453 FGK stars with white dwarf companions from LAMOST DR 4

Type Ia supernova remnants: shaping by iron bullets

Astrophysical explosions: from solar flares to cosmic gamma-ray bursts

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