Axion production from Landau quantization in the strong magnetic field of magnetars

doi:10.1016/j.physletb.2018.01.084

Title: Axion production from Landau quantization in the strong magnetic field of magnetars

Abstract

We utilize an exact quantum calculation to explore axion emission from electrons and protons in the presence of the strong magnetic field of magnetars. The axion is emitted via transitions between the Landau levels generated by the strong magnetic field. The luminosity of axions emitted by protons is shown to be much larger than that of electrons and becomes stronger with increasing matter density. Cooling by axion emission is shown to be much larger than neutrino cooling by the Urca processes. Consequently, axion emission in the crust may significantly contribute to the cooling of magnetars. In the high-density core, however, it may cause heating of the magnetar.

Authors:

; Balantekin, A. Baha; Cheoun, Myung-Ki; Kajino, Toshitaka; Mathews, Grant J.

Publication Date:: 2018-04-01

Research Org.:: Univ. of Notre Dame, IN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1437824

Alternate Identifier(s):: OSTI ID: 1499274

Grant/Contract Number:: FG02-95-ER40934; FG02-95ER40934

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 779 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats


                    Maruyama, Tomoyuki, Balantekin, A. Baha, Cheoun, Myung-Ki, Kajino, Toshitaka, and Mathews, Grant J. Axion production from Landau quantization in the strong magnetic field of magnetars.  Netherlands: N. p., 2018. 
        Web.  doi:10.1016/j.physletb.2018.01.084.

Copy to clipboard


                    Maruyama, Tomoyuki, Balantekin, A. Baha, Cheoun, Myung-Ki, Kajino, Toshitaka, & Mathews, Grant J. Axion production from Landau quantization in the strong magnetic field of magnetars.  Netherlands.  doi:10.1016/j.physletb.2018.01.084.

Copy to clipboard


                    Maruyama, Tomoyuki, Balantekin, A. Baha, Cheoun, Myung-Ki, Kajino, Toshitaka, and Mathews, Grant J. Sun .  
        "Axion production from Landau quantization in the strong magnetic field of magnetars".  Netherlands.  doi:10.1016/j.physletb.2018.01.084.

Copy to clipboard


                    
@article{osti_1437824,

  title        = {Axion production from Landau quantization in the strong magnetic field of magnetars},

  author       = {Maruyama, Tomoyuki and Balantekin, A. Baha and Cheoun, Myung-Ki and Kajino, Toshitaka and Mathews, Grant J.},

  abstractNote = {We utilize an exact quantum calculation to explore axion emission from electrons and protons in the presence of the strong magnetic field of magnetars. The axion is emitted via transitions between the Landau levels generated by the strong magnetic field. The luminosity of axions emitted by protons is shown to be much larger than that of electrons and becomes stronger with increasing matter density. Cooling by axion emission is shown to be much larger than neutrino cooling by the Urca processes. Consequently, axion emission in the crust may significantly contribute to the cooling of magnetars. In the high-density core, however, it may cause heating of the magnetar.},

  doi          = {10.1016/j.physletb.2018.01.084},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 779,

  place        = {Netherlands},

  year         = {2018},

  month        = {4}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Publisher's Version of Record
DOI: 10.1016/j.physletb.2018.01.084

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 2 works

Citation information provided by
Web of Science

Figures / Tables:

Fig. 1. : (Color online.) Axion luminosity per nucleon versus temperature at baryon densities $ρ$_$B$ = 0.1$ρ$₀ (a) $ρ$_$B$ = 0.5$ρ$₀ (b), $ρ$_$B$ = $ρ$₀ (c) and $ρ$_$B$ = 2$ρ$₀ (d) for $B$ = 10¹⁵ G. The solid and dot-dashed lines represent the results for protons with and without themore »

All figures and tables (3 total)

Save / Share:

Export Metadata

Save to My Library

Figures / Tables found in this record:

Fig. 1. (p. 3)

Fig. 2. (p. 4)

Fig. 3. (p. 5)

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

Similar Records in DOE PAGES and OSTI.GOV collections:

Pion production via proton synchrotron radiation in strong magnetic fields in relativistic field theory: Scaling relations and angular distributions

Journal Article Maruyama, Tomoyuki ; Cheoun, Myung-Ki ; Kajino, Toshitaka ; ... - Physics Letters B

We study pion production by proton synchrotron radiation in the presence of a strong magnetic field when the Landau numbers of the initial and final protons are n(i, f) similar to 10(4)-10(5). We find in our relativistic field theory calculations that the pion decay width depends only on the field strength parameter which previously was only conjectured based upon semi-classical arguments. Moreover, we also find new results that the decay width satisfies a robust scaling relation, and that the polar angular distribution of emitted pion momenta is very narrow and can be easily obtained. This scaling implies that one canmore »« less
DOI: 10.1016/j.physletb.2016.03.065
HYPERACCRETING DISKS AROUND MAGNETARS FOR GAMMA-RAY BURSTS: EFFECTS OF STRONG MAGNETIC FIELDS

Journal Article Dong, Zhang ; Dai, Z. G., E-mail: dzhang@astronomy.ohio-state.ed, E-mail: dzg@nju.edu.c - Astrophysical Journal

Hyperaccreting neutron stars or magnetar disks cooled via neutrino emission can be candidates of gamma-ray burst (GRB) central engines. The strong field {>=}10{sup 15}-10{sup 16} G of a magnetar can play a significant role in affecting the disk properties and even lead to the funnel accretion process. In this paper, we investigate the effects of strong fields on the disks around magnetars, and discuss implications of such accreting magnetar systems for GRBs and GRB-like events. We discuss quantum effects of the strong fields on the disk thermodynamics and microphysics due to modifications of the electron distribution and energy in themore »« less
DOI: 10.1088/0004-637X/718/2/841
MAGNETIC FIELD-DECAY-INDUCED ELECTRON CAPTURES: A STRONG HEAT SOURCE IN MAGNETAR CRUSTS

Journal Article Cooper, Randall L ; Kaplan, David L., E-mail: rcooper@kitp.ucsb.edu, E-mail: dkaplan@kitp.ucsb.edu - Astrophysical Journal Letters

We propose a new heating mechanism in magnetar crusts. Magnetars' crustal magnetic fields are much stronger than their surface fields; therefore, magnetic pressure partially supports the crust against gravity. The crust loses magnetic pressure support as the field decays and must compensate by increasing the electron degeneracy pressure; the accompanying increase in the electron Fermi energy induces nonequilibrium, exothermic electron captures. The total heat released via field-decay electron captures is comparable to the total magnetic energy in the crust. Thus, field-decay electron captures are an important, if not the primary, mechanism powering magnetars' soft X-ray emission.
DOI: 10.1088/2041-8205/708/2/L80; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
Axions and SN 1987A: Axion trapping

Technical Report Burrows, A ; Ressell, M T ; Turner, M S

If an axion of mass between about 10(exp -3) eV and 1 eV exists, axion emission would have significantly affected the cooling of the nascent neutron star associated with SN 1987A. For an axion of mass less than about 10(exp -2) eV, axions produced deep inside the neutron star simply stream out; in a previous paper this case has been addressed. Remarkably, for an axion of mass greater than about 10(exp -2) eV axions would, like neutrinos, have a mean-free path that is smaller than the size of a neutron star, and thus would become trapped and radiated from anmore »« less
Axions and SN 1987A: Axion trapping. [SN 1987a]

Journal Article Burrows, A ; Ressell, M T ; Turner, M S - Physical Review, D (Particles Fields); (USA)

If an axion of mass between about 10{sup {minus}3} and 10 eV exists, axion emission would have significantly affected the cooling of the nascent neutron star associated with SN 1987A. For an axion of mass less than about 10{sup {minus}2} eV axions produced deep inside the neutron star simply stream out; in a previous paper we have addressed this case. Remarkably, for an axion of mass greater than about 10{sup {minus}2} eV axions would, like neutrinos, have a mean free path that is smaller than the size of a neutron star, and thus would become trapped'' and radiated from anmore »« less
DOI: 10.1103/PhysRevD.42.3297

Similar Records