Axions and SN 1987A: Axion trapping

Burrows, Adam; Ressell, M. T.; Turner, Michael S.

doi:10.1103/physrevd.42.3297

Cited by 135 publications

(128 citation statements)

References 40 publications

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“…The late-time signal is most sensitive to such losses because the early neutrino emission is powered by accretion and thus not very sensitive to volume losses. This argument has been applied to many cases, from right-handed neutrinos to Kaluza-Klein gravitons, but axions are the earliest and most widely discussed example [23,[66][67][68][69][70][71][72][73][74][75]. They are emitted by nucleon bremsstrahlung N + N → N + N + a that depends on the axion-nucleon Yukawa coupling g aN N , here taken to be an average of the couplings to neutrons and protons.…”

Section: Energy-loss Argumentmentioning

confidence: 99%

“…Freely streaming axions are emitted from the entire core volume, trapped ones from an "axion sphere." The solid line is from numerical calculations [71,72]. The dotted line is an arbitrary continuation to guide the eye water Cherenkov detectors that registered the SN 1987A neutrinos, these axions would have interacted with oxygen nuclei, leading to the release of γ rays and causing too many events [76].…”

Section: Energy-loss Argumentmentioning

confidence: 99%

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Astrophysical Axion Bounds

Raffelt

2001

Dark Matter in Astro- And Particle Physics

121

200

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Summary. Axion emission by hot and dense plasmas is a new energy-loss channel for stars. Observational consequences include a modification of the solar sound-speed profile, an increase of the solar neutrino flux, a reduction of the helium-burning lifetime of globular-cluster stars, accelerated white-dwarf cooling, and a reduction of the supernova SN 1987A neutrino burst duration. We review and update these arguments and summarize the resulting axion constraints.

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Section: Energy-loss Argumentmentioning

confidence: 99%

Section: Energy-loss Argumentmentioning

confidence: 99%

Astrophysical Axion Bounds

Raffelt

2001

Dark Matter in Astro- And Particle Physics

121

200

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“…There are two most often discussed classes of axion; "hadronic" axions that do not couple to leptons and quarks at tree level (Kim 1979;Shifman et al 1980) and DFSZ axions that do (Dine et al 1981;Zhitnitskii 1980). Both types of axion are constrained to have masses less than about 10 −3 −10 −2 eV based on analyses of the neutrino burst from SN 1987A (Burrows et al 1989;Keil et al 1997), while hadronic axions may also have a mass of a few eV, bounded from below by treatments of axion trapping in SN 1987A (Burrows et al 1990) and from above by studies of red giant evolution (Haxton & Lee 1991). Studies of white dwarf cooling and pulsation also indicate DFSZ axion masses of order 10 −3 eV (Isern et al 2010).…”

Section: Introductionmentioning

confidence: 99%

On the detectability of⁵⁷Fe axion-photon mode conversion in the Sun

Laming¹

2013

A&A

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Aims. The purpose of this paper is to assess the feasibility of axion detection by X-ray spectroscopy of the sun. Methods. We review the theory of axion-photon mode conversion with special attention to axions emitted in the 14.4 keV M1 decay of 57 Fe at the solar center. These then mode convert to photons in the outer layers of the solar envelope, and may in principle be detected subsequently as X-rays. Results. For axion masses above about 10 −4 eV, resonant mode conversion at a layer where the axion mass matches the local electron plasma frequency is necessary. For axion masses above about 10 −2 eV, this mode conversion occurs too deep in the solar atmosphere for the resulting photon to escape the solar surface and be detected before Compton scattering obscures the line. At the (detectable) axion masses below this, the flux of mode converted photons predicted by axion models appears to be too low for detection to be feasible with current instrumentation. Nonresonant mode conversion for axion masses below 10 −4 eV is also plausible, but with still lower predicted fluxes, since the axion coupling constant is related to its mass. Conclusions. Prospects for meaningful constraints on massive axion parameters from X-ray observations of this transition from the Sun do not appear to be promising. However parameters for massless counterparts (e.g. the "arion") may still result from such observations. It may mode convert in the outer layers of the solar atmosphere, but is not restricted by this to have a small coupling constant.

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“…In ref. [18], it is assumed η ≃ 3 − β, which is a pretty good approximation in the limit y ≪ 1 (see the discussion above). In this case, expression (33) reduces to …”

Section: Discussionmentioning

confidence: 99%

“…that reduces to the definition (2) in [18] in the limit of zero axion mass. The notation dN (−a) means that the axion four-momentum must be taken with the opposite sign in the δ function, with respect to expression (3).…”

Section: Bremsstrahlung Emission Of Heavy Axionsmentioning

confidence: 99%

Nucleon-nucleon bremsstrahlung emission of massive axions

Giannotti

Nesti

2005

Phys. Rev. D

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We consider the problem of axion production by bremsstrahlung emission in a nuclear medium. The usual assumption of a massless axion is replaced by more general hypotheses, so that we can describe the emission process for axions with mass up to a few MeV. We point out that in certain physical situations the contribution from non-zero mass is non-negligible. In particular, in the mechanism for the production of Gamma Ray Bursts via emission of heavy axions the axion mass (m a ∼ 1 MeV) is comparable with the temperature of the nuclear medium, and thus can not be disregarded. Looking at our results we find, in fact, a fairly considerable reduction of the axion luminosity in that mechanism.

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Axions and SN 1987A: Axion trapping

Cited by 135 publications

References 40 publications

Astrophysical Axion Bounds

Astrophysical Axion Bounds

On the detectability of⁵⁷Fe axion-photon mode conversion in the Sun

Nucleon-nucleon bremsstrahlung emission of massive axions

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Axions and SN 1987A: Axion trapping

Cited by 135 publications

References 40 publications

Astrophysical Axion Bounds

Astrophysical Axion Bounds

On the detectability of57Fe axion-photon mode conversion in the Sun

Nucleon-nucleon bremsstrahlung emission of massive axions

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On the detectability of⁵⁷Fe axion-photon mode conversion in the Sun