Probing the angle of birefringence due to long range axion hair from pulsars

Poddar, Tanmay Kumar; Mohanty, Sanghamitra

doi:10.1103/physrevd.102.083029

Cited by 23 publications

(14 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We obtain the birefringent angle due to this axion hair as 0.42 • which is within the accuracy of measuring the linear polarization angle of pulsar light. Our result continues to hold for axions with m a < 10 −11 eV and f a 10 17 GeV which is shown in Figure 1 (lower panel, right) [5].…”

Section: Probing the Angle Of Birefringence Due To Long Range Axion H...supporting

confidence: 77%

Probing light dark matter particles with astrophysical experiments

Poddar¹

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

Self Cite

View full text Add to dashboard Cite

Section: Probing the Angle Of Birefringence Due To Long Range Axion H...supporting

confidence: 77%

Probing light dark matter particles with astrophysical experiments

Poddar¹

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

Self Cite

View full text Add to dashboard Cite

“…One way to search for axion dark matter is by observing its decay into two photons [13][14][15][16][17][18][19][20][21][22][23][24]. However, compact objects have long been known to offer a useful avenue in which to probe axions and ALPs in a variety of ways [25][26][27][28][29][30][31][32][33]. Neutron stars (NSs) in particular offer an exciting opportunity for increasing the possibility to detect axion dark matter by allowing axions to resonantly convert into radio photons in their magnetospheres.…”

Section: Jhep09(2021)105mentioning

confidence: 99%

Radio line properties of axion dark matter conversion in neutron stars

Battye

Garbrecht

McDonald

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

Axions are well-motivated candidates for dark matter. Recently, much interest has focused on the detection of photons produced by the resonant conversion of axion dark matter in neutron star magnetospheres. Various groups have begun to obtain radio data to search for the signal, however, more work is needed to obtain a robust theory prediction for the corresponding radio lines. In this work we derive detailed properties for the signal, obtaining both the line shape and time-dependence. The principal physical effects are from refraction in the plasma as well as from gravitation which together lead to substantial lensing which varies over the pulse period. The time-dependence from the co-rotation of the plasma with the pulsar distorts the frequencies leading to a Doppler broadened signal whose width varies in time. For our predictions, we trace curvilinear rays to the line of sight using the full set of equations from Hamiltonian optics for a dispersive medium in curved spacetime. Thus, for the first time, we describe the detailed shape of the line signal as well as its time dependence, which is more pronounced compared to earlier results. Our prediction of the features of the signal will be essential for this kind of dark matter search.

show abstract

“…One way to search for axion dark matter is by observing its decay into two photons [10][11][12][13][14][15][16][17][18][19]. However, compact objects have long been known to offer a useful avenue in which to probe axions and ALPs in a variety of ways [20][21][22][23][24][25][26][27][28]. Neutron stars (NSs) in particular offer an exciting opportunity for increasing the possibility to detect axion dark matter by allowing axions to resonantly convert into radio photons in their magnetospheres.…”

Section: Introductionmentioning

confidence: 99%

Radio Line Properties of Axion Dark Matter Conversion in Neutron Stars

Battye,

Garbrecht,

McDonald

et al. 2021

Preprint

View full text Add to dashboard Cite

Axions are well-motivated candidates for dark matter. Recently, much interest has focused on the detection of photons produced by the resonant conversion of axion dark matter in neutron star magnetospheres. Various groups have begun to obtain radio data to search for the signal, however, more work is needed to obtain a robust theory prediction for the corresponding radio lines. In this work we derive detailed properties for the signal, obtaining both the line shape and time-dependence. The principal physical effects are from refraction in the plasma as well as from gravitation which together lead to substantial lensing which varies over the pulse period. The timedependence from the co-rotation of the plasma with the pulsar distorts the frequencies leading to a Doppler broadened signal whose width varies in time. For our predictions, we trace curvilinear rays to the line of sight using the full set of equations from Hamiltonian optics for a dispersive medium in curved spacetime. Thus, for the first time, we describe the detailed shape of the line signal as well as its time dependence, which is more pronounced compared to earlier results. Our prediction of the features of the signal will be essential for this kind of dark matter search.

show abstract

Probing the angle of birefringence due to long range axion hair from pulsars

Cited by 23 publications

References 56 publications

Probing light dark matter particles with astrophysical experiments

Probing light dark matter particles with astrophysical experiments

Radio line properties of axion dark matter conversion in neutron stars

Radio Line Properties of Axion Dark Matter Conversion in Neutron Stars

Contact Info

Product

Resources

About