Impact of axions on the Cassiopea A neutron star cooling

Abstract

The observed anomalous steady decrease in surface temperature of the supernova remnant Cassiopeia A (Cas A), which was reported about ten years ago, has generated much debate. Several exotic cooling scenarios have been proposed using non-standard assumptions about the physics and evolution of this neutron star (NS). At present, significant corrections have been made to the observational data, which make it possible to numerically simulate the Cas A NS cooling process in the framework of the scenario of minimal neutrino cooling. If there is an additional source of cooling, such as axion emission, the steepness of the Cas A NS surface temperature drop will increase with the growth of the axion-nucleon interaction strength. This makes it possible to limit the minimum value of the axion decay constant $f_a$ using the condition that the NS surface temperature should be within the 99% confidence interval obtained from the observational data. Two types of axion models are considered: the Kim-Shifman-Weinstein-Zakharov -- KSVZ model and the Dean-Fischler-Srednitsky-Zhitnitsky --DFSZ model. The above criterion gives a lower limit on the axion decay constant, $f_a>3\times 10^7$ GeV and $f_a>4.5\times 10^8$ GeV for KSVZ and DFSZ axions, respectively.

14 pages, 4 figures

References in corpus (8)

• Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter
• The Expansion Asymmetry and Age of the Cassiopeia A Supernova Remnant
• Tests of the nuclear equation of state and superfluid and superconducting gaps using the Cassiopeia A neutron star
• Discovery of the radio and X-ray counterpart of TeV Gamma-ray source HESS J1731-347
• Neutrino emission due to Cooper-pair recombination in neutron stars revisited
• Axion mass limit from observations of the neutron star in Cassiopeia A
• Superfluid Response and the Neutrino Emissivity of Neutron Matter
• Constraints on axions from neutron star in HESS J1731-347

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• Searching for dark matter with the Th-229 nuclear lineshape from laser spectroscopy
• Prospects of nuclear-coupled-dark-matter detection via correlation spectroscopy of I${}_2^{+}$ and Ca${}^{+}$
• Probing dark gauge boson with observations from neutron stars
• Aspects of Axions and ALPs Phenomenology
• Hybrid cooling of the Cassiopeia A neutron star
• Probing the Axion-Nucleon Coupling with Supergiant Stars
• A Continuous Galactic Line Source of Axions: The Remarkable Case of 23Na
• Axion Emission from Proton Cooper Pairs in Neutron Stars