Constraints on Axionlike Particles from a Hard X-Ray Observation of Betelgeuse

Xiao, M.; Perez, K.; Giannotti, Maurizio; Straniero, O.; Mirizzi, Alessandro; Grefenstette, Brian W.; Roach, Brandon; Nynka, Melania

doi:10.1103/physrevlett.126.031101

Cited by 41 publications

(34 citation statements)

References 58 publications

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“…Similarly, the absence of a gamma-ray signal linked to the reprocessing of ALPs generated at the core of SN1987A 𝑔 a𝛾 < (0.5 − 1.8) × 10 −11 GeV −1 for 𝑚 a < (3.5 − 5.5) × 10 −11 eV (Xiao et al 2021), on the basis of similar magnetic field assumptions. Key to our work lies the notion that thermally rich clusters of galaxies hosting bright Active Galactic Nuclei (AGN) are efficient photon-ALP inter-converters.…”

Section: Introductionmentioning

confidence: 85%

New constraints on light Axion-Like Particles using Chandra Transmission Grating Spectroscopy of the powerful cluster-hosted quasar H1821+643

Reynés,

Matthews,

Reynolds

et al. 2021

Preprint

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Axion-Like Particles (ALPs) are predicted by several Beyond the Standard Model theories, in particular, string theory. In the presence of an external magnetic field perpendicular to the direction of propagation, ALPs can couple to photons. Therefore, if an X-ray source is viewed through a magnetised plasma, such as a luminous quasar in a galaxy cluster, we may expect spectral distortions that are well described by photon-ALP oscillations. We present a 571 ks combined High and Low Energy Transmission Grating (HETG/LETG) Chandra observation of the powerful radio-quiet quasar H1821+643, hosted by a cool-core cluster at redshift 0.3. The spectrum is well described by a double power-law continuum and broad+narrow iron line emission typical of type-1 Active Galactic Nuclei (AGN), with remaining spectral features < 2.5%. Using a cell-based approach to describe the turbulent cluster magnetic field, we compare our spectrum with photon-ALP mixing curves for 500 field realisations assuming that the thermal-to-magnetic pressure ratio remains constant up to the virial radius. At 99.7% credibility, we exclude all couplings 𝑔 a𝛾 > 6.3 × 10 −13 GeV −1 for most ALP masses < 10 −12 eV. Our results are moderately more sensitive to constraining ALPs than the best previous result from Chandra observations of the Perseus cluster, albeit with a less constrained field model. We provide the best constraints on light ALPs, exceeding the projected sensitivity of next generation axion helioscopes. We reflect on the promising future of ALP studies with bright AGN embedded in rich clusters, especially with the upcoming Athena mission.

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Section: Introductionmentioning

confidence: 85%

New constraints on light Axion-Like Particles using Chandra Transmission Grating Spectroscopy of the powerful cluster-hosted quasar H1821+643

Reynés,

Matthews,

Reynolds

et al. 2021

Preprint

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“…Conventional stars and neutron stars are also surprisingly efficient in producing observable fluxes of FIPs. Studied examples of conventional stars include Betelgeuse [138] and Wolf-Rayet stars in superclusters [139]. Both cases were applied to axion like particles and resulted in strong bounds on the ALP-photon coupling, comparable to the bounds from SN 1987A.…”

Section: Stars As Fip Factoriesmentioning

confidence: 99%

Feebly-interacting particles: FIPs 2020 workshop report

et al. 2021

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With the establishment and maturation of the experimental programs searching for new physics with sizeable couplings at the LHC, there is an increasing interest in the broader particle and astrophysics community for exploring the physics of light and feebly-interacting particles as a paradigm complementary to a New Physics sector at the TeV scale and beyond. FIPs 2020 has been the first workshop fully dedicated to the physics of feebly-interacting particles and was held virtually from 31 August to 4 September 2020. The workshop has gathered together experts from collider, beam dump, fixed target experiments, as well as from astrophysics, axions/ALPs searches, current/future neutrino experiments, and dark matter direct detection communities to discuss progress in experimental searches and underlying theory models for FIPs physics, and to enhance the cross-fertilisation across different fields. FIPs 2020 has been complemented by the topical workshop “Physics Beyond Colliders meets theory”, held at CERN from 7 June to 9 June 2020. This document presents the summary of the talks presented at the workshops and the outcome of the subsequent discussions held immediately after. It aims to provide a clear picture of this blooming field and proposes a few recommendations for the next round of experimental results.

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“…On the other hand, for large ALP masses Φ 1 and the oscillation probability acquires a dependence on the energy and decreases rapidly with the axion mass, P aγ ∝ m −4 a , as evident in Figure 1, where we show the behavior of the conversion probability P aγ for a source at distance r = 1 kpc for a value of the regular magnetic field B reg = 3 µG in function of the ALP mass m a . In the Figure, we fixed the axion coupling to g aγ = 10 −11 GeV −1 and take three representative ALP energies: E = 50 keV (black curve), representative of the typical energy of ALPs emitted from a red supergiant star during its late evolutionary stages [20]; E = 100 MeV (red curve), representative of the energies of ALPs emitted from supernova explo-sions [23]; and E = 10 GeV (blue curve), representative of gamma-rays from galactic pulsars [9].…”

Section: B Conversions In the Regular Magnetic Fieldmentioning

confidence: 99%

“…Dimming effects on the photons from Supernovae Ia induced by photons oscillating into ALPs and viceversa in the intergalactic magnetic field have also been characterized [16][17][18]. Finally, ALPs produced in the hot core of massive stars such as red supergiants [19,20] and corecollapse supernovae [21][22][23], and converted in the Milky-Way magnetic field, would produce a copious photon flux.…”

Section: Introductionmentioning

confidence: 99%

Turbulent axion-photon conversions in the Milky-Way

Carenza,

Evoli,

Giannotti

et al. 2021

Preprint

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Constraints on Axionlike Particles from a Hard X-Ray Observation of Betelgeuse

Cited by 41 publications

References 58 publications

New constraints on light Axion-Like Particles using Chandra Transmission Grating Spectroscopy of the powerful cluster-hosted quasar H1821+643

New constraints on light Axion-Like Particles using Chandra Transmission Grating Spectroscopy of the powerful cluster-hosted quasar H1821+643

Feebly-interacting particles: FIPs 2020 workshop report

Turbulent axion-photon conversions in the Milky-Way

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