On ALP scenarios and GRB 221009A

Marsh, M. C. David

doi:10.48550/arxiv.2211.02010

“…A host was later confirmed, and a similar redshift of z = 0.151 was determined by Izzo et al (2022) through the identification of host-galaxy absorption and emission lines. At this extragalactic distance, such VHE photons should be absorbed through pair production when they scatter off the extragalactic background light, raising the possibility of axion-like particle production (Baktash et al 2022;Carenza & Marsh 2022). The remarkably high fluence, luminosity and detection of VHE photons make GRB 221009A an object of broad interest.…”

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confidence: 99%

The Optical Light Curve of GRB 221009A: The Afterglow and the Emerging Supernova

Fulton

¹

,

Smartt

²

,

Rhodes

³

et al. 2023

ApJL

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We present extensive optical photometry of the afterglow of GRB 221009A. Our data cover 0.9–59.9 days from the time of Swift and Fermi gamma-ray burst (GRB) detections. Photometry in rizy-band filters was collected primarily with Pan-STARRS and supplemented by multiple 1–4 m imaging facilities. We analyzed the Swift X-ray data of the afterglow and found a single decline rate power law f(t) ∝ t −1.556±0.002 best describes the light curve. In addition to the high foreground Milky Way dust extinction along this line of sight, the data favor additional extinction to consistently model the optical to X-ray flux with optically thin synchrotron emission. We fit the X-ray-derived power law to the optical light curve and find good agreement with the measured data up to 5−6 days. Thereafter we find a flux excess in the riy bands that peaks in the observer frame at ∼20 days. This excess shares similar light-curve profiles to the Type Ic broad-lined supernovae SN 2016jca and SN 2017iuk once corrected for the GRB redshift of z = 0.151 and arbitrarily scaled. This may be representative of an SN emerging from the declining afterglow. We measure rest-frame absolute peak AB magnitudes of M g = −19.8 ± 0.6 and M r = − 19.4 ± 0.3 and M z = −20.1 ± 0.3. If this is an SN component, then Bayesian modeling of the excess flux would imply explosion parameters of M ej = 7.1 − 1.7 + 2.4 M ⊙, M Ni = 1.0 − 0.4 + 0.6 M ⊙, and v ej = 33,900 − 5700 + 5900 km s−1, for the ejecta mass, nickel mass, and ejecta velocity respectively, inferring an explosion energy of E kin ≃ 2.6–9.0 × 1052 erg.

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“…To better reflect the actual galactic environment, refs. [65,68] assume that the magnetic field configuration of the HG is identical to that of the Milky Way. Given the limited available information about the HG, ref.…”

Section: Jcap01(2024)026mentioning

confidence: 99%

“…Given the limited available information about the HG, ref. [68] investigates the influence of photon trajectories in the magnetic field. Fortunately, recent observations of Hubble Space Telescope (HST) have revealed important properties of the HG [71].…”

Section: Jcap01(2024)026mentioning

confidence: 99%

“…The detection of such high-energy photons from extragalactic sources poses a challenge to many EBL models, as it is difficult for high-energy photons with energies of ∼ 18 TeV to reach the Earth according to these models. The exceptional nature of this high-energy observation has attracted considerable attention, leading to various proposed explanations, including Lorentz invariance violation and ALPs [61][62][63][64][65][66][67][68][69].…”

Section: Introductionmentioning

confidence: 99%

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Constraints on axion-like particles from the observation of GRB 221009A by LHAASO

Gao,

Bi,

Li

et al. 2024

J. Cosmol. Astropart. Phys.

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The LHAASO collaboration recently reported the measurement of the gamma-ray spectra of GRB 221009A, which is the brightest burst ever, covering an energy range from 0.3 TeV to about 10 TeV. Based on the observation, we investigate the ALP-photon oscillation effect in the host galaxy of GRB 221009A and the Milky Way. The CLs method is applied to set constraints on the ALP parameters in this study. Given the uncertain magnetic field configuration in the host galaxy, we use three different models: a homogeneous magnetic field model, a magnetic field model identical to that of the Milky Way, and a model constructed from the HST observations of the host galaxy. We find that the constraints derived using these three host galaxy magnetic field models are comparable. Our results are complementary in the small ALP mass regions compared with other experiments.

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“…3 The highest energetic photons were reported to reach ∼ 18 TeV, representing the first observation of photons above 10 TeV from gamma-ray bursts (GRBs). Such observations intrigued studies on photon mixing with axionlike particles [1][2][3][4][5][6][7][8][9], Lorentz symmetry violation [3,[10][11][12][13][14][15][16], ultra-high-energy cosmic rays [17], dark photon [5], sterile neutrinos [18][19][20], and misidentification of the showers [3]. In our work, we will investigate the survival probability of multi-TeV photons from GRB 221009A by considering the fact that they are significantly absorbed by the extragalactic background light intervening between the GRB and the Earth.…”

Section: Introductionmentioning

confidence: 99%

Multi-TeV photons from GRB 221009A: uncertainty of optical depth considered

Zhao

¹

,

Zhou

²

,

Wang

³

2023

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It is reported that the Large High Altitude Air Shower Observatory (LHAASO) observed thousands of very-high-energy photons up to $$\sim $$ ∼ 18 TeV from GRB 221009A. We study the survival rate of these photons via considering the fact that they are absorbed by the extragalactic background light. By performing a set of $$10^6$$ 10 6 Monte-Carlo simulations, we explore the parameter space allowed by current observations and estimate the probability of predicting that LHAASO detects at least one photon of 18 TeV from GRB 221009A. We find that the standard physics is compatible with the observations of 18 TeV photons within $$3.5\sigma $$ 3.5 σ confidence interval. Our research method can be straightforwardly generalized to study more data sets of LHAASO and other experiments in the future.

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On ALP scenarios and GRB 221009A

Cited by 7 publications

References 30 publications

The Optical Light Curve of GRB 221009A: The Afterglow and the Emerging Supernova

The Optical Light Curve of GRB 221009A: The Afterglow and the Emerging Supernova

Constraints on axion-like particles from the observation of GRB 221009A by LHAASO

Multi-TeV photons from GRB 221009A: uncertainty of optical depth considered

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