Constraints on Axionlike Particles from a Hard X-Ray Observation of Betelgeuse.
| Autor: | Xiao M; Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA., Perez KM; Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA., Giannotti M; Physical Sciences, Barry University, 11300 NE 2nd Ave., Miami Shores, Florida 33161, USA., Straniero O; Istituto Nazionale di Astrofisica, Osservatorio Astronomico d'Abruzzo, 64100 Teramo, Italy., Mirizzi A; Dipartimento Interateneo di Fisica 'Michelangelo Merlin', Via Amendola 173, 70126 Bari, Italy.; Istituto Nazionale di Fisica Nucleare-Sezione di Bari, Via Orabona 4, 70126 Bari, Italy., Grefenstette BW; Cahill Center for Astrophysics, 1216 E. California Blvd, California Institute of Technology, Pasadena, California 91125, USA., Roach BM; Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA., Nynka M; MIT Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Physical review letters [Phys Rev Lett] 2021 Jan 22; Vol. 126 (3), pp. 031101. |
| DOI: | 10.1103/PhysRevLett.126.031101 |
| Abstrakt: | We use the first observation of Betelgeuse in hard x rays to perform a novel search for axionlike particles (ALPs). Betelgeuse is not expected to be a standard source of x rays, but light ALPs produced in the stellar core could be converted back into photons in the Galactic magnetic field, producing a detectable flux that peaks in the hard x-ray band (E_{γ}>10 keV). Using a 50 ks observation of Betelgeuse by the NuSTAR satellite telescope, we find no significant excess of events above the expected background. Using models of the regular Galactic magnetic field in the direction of Betelgeuse, we set a 95% C.L. upper limit on the ALP-photon coupling of g_{aγ}<(0.5-1.8)×10^{-11} GeV^{-1} (depending on magnetic field model) for ALP masses m_{a}<(5.5-3.5)×10^{-11} eV. |
| Databáze: | MEDLINE |
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