期刊
PHYSICAL REVIEW LETTERS
卷 128, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.071102
关键词
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资金
- National Science Foundation [2114024]
- DOE Early Career Grant [DE-SC0019225]
- Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- National Aeronautics and Space Administration through Chandra [GO0-21013X]
- National Aeronautics Space Administration [NAS8-03060]
Axions with electromagnetic-like couplings at a level around few x 10(-11) GeV-1 may address some astrophysical anomalies, but the non-observation of X-rays from a magnetic white dwarf severely constrains the axion-photon coupling.
Axions with couplings g(a gamma gamma) similar to few x 10(-11) GeV-1 to electromagnetism may resolve a number of astrophysical anomalies, such as unexpected similar to TeV transparency, anomalous stellar cooling, and x-ray excesses from nearby neutron stars. We show, however, that such axions are severely constrained by the nonobservation of x rays from the magnetic white dwarf (MWD) RE J0317-853 using similar to 40 ks of data acquired from a dedicated observation with the Chandra X-ray Observatory. Axions may be produced in the core of the MWD through electron bremsstrahlung and then convert to x rays in the magnetosphere. The nonobservation of x rays constrains the axion-photon coupling to g(a gamma gamma) less than or similar to 5.5 x 10(-13) root C-a gamma gamma/C-a gamma gamma GeV-1 at 95% confidence for axion masses m(a) less than or similar to 5 x 10(-6) eV, with C-aee and C-a gamma gamma the dimensionless coupling constants to electrons and photons. Considering that C-aee is generated from the renormalization group, our results robustly disfavor g(a gamma gamma) greater than or similar to 4.4 x 10(-11) GeV-1 even for models with no ultraviolet contribution to C-aee.
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