Constraints on Axion-like Particles from X-Ray Observations of NGC1275

被引：68

作者：

Berg, Marcus ^{[1
]}

Conlon, Joseph P. ^{[2
]}

Day, Francesca ^{[2
]}

Jennings, Nicholas ^{[2
]}

Krippendorf, Sven ^{[2
]}

Powell, Andrew J. ^{[2
]}

Rummel, Markus ^{[2
]}

机构：

[1] Karlstad Univ, Dept Phys, SE-65188 Karlstad, Sweden

[2] Rudolf Peierls Ctr Theoret Phys, 1 Keble Rd, Oxford OX1 3NP, England

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 847卷 / 02期

基金：

欧洲研究理事会;

关键词：

elementary particles; X-rays: galaxies: clusters; X-rays: individual (NGC1275); SN; 1987A; LINE;

D O I：

10.3847/1538-4357/aa8b16

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Axion-like particles (ALPs) can induce localized oscillatory modulations in the spectra of photon sources passing through astrophysical magnetic fields. Ultra-deep Chandra observations of the Perseus cluster contain over 5 x 10(5) counts from the active galactic nucleus (AGN) of the central cluster galaxy NGC1275 and represent a data set of extraordinary quality for ALP searches. We use this data set to search for X-ray spectral irregularities from the AGN. The absence of irregularities at the O(30%) level allows us to place leading constraints on the ALP-photon mixing parameter g(a gamma gamma) less than or similar to 1.4-4.0 x 10(-12) GeV-1 for m(a) less than or similar to 10(-12) eV, depending on assumptions on the magnetic field realization along the line of sight.

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