Orbital Phase-resolved Analysis of X-Ray and Gamma-Ray Observations of the High-mass Gamma-Ray Binary 4FGL J1405.1−6119

Abstract We present the results of multiwavelength observations of the high-mass gamma-ray binary (HMGB) 4FGL J1405.1−6119. A pair of joint XMM-Newton and NuSTAR observations taken in 2019 (sampling the gamma-ray maximum and X-ray maximum) characterize the emissiong of soft and hard X-rays. We find variability of the hydrogen column density along our line of sight, N H , and photon index, Γ, and find no evidence of pulsations in X-rays. We also refine a new best-fit orbital period to P = 13.7157 ± 0.0014 days, the first orbital phase-resolved analysis based on nearly 16 yr of Fermi-LAT observations of 4FGL J1405.1−6119 and the evolution of the spectral shape as a function of orbital phase. Finally, the X-ray and gamma-ray spectra for the phases sampled in the new X-ray observations can be interpreted in the framework of the intrabinary shock model, previously applied to HMGBs such as LS 5039.

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Publication Details

Journal
The Astrophysical Journal
Published
2025-06-17
DOI
https://doi.org/10.3847/1538-4357/adda32
Primary Topic
Astrophysical Phenomena and Observations
Type
article
Field-Weighted Citation Impact
0.00

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article

Orbital Phase-resolved Analysis of X-Ray and Gamma-Ray Observations of the High-mass Gamma-Ray Binary 4FGL J1405.1−6119

G. Dubus, Jeremy Hare, J. Barnes, Joel B. Coley et al.
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The Astrophysical Journal
Astrophysical Phenomena and Observations
article

Orbital Phase-resolved Analysis of X-Ray and Gamma-Ray Observations of the High-mass Gamma-Ray Binary 4FGL J1405.1−6119

G. Dubus, Jeremy Hare, J. Barnes, Joel B. Coley, Nazma Islam, R. H. D. Corbet, A. E. Lange
article en

Abstract

Abstract We present the results of multiwavelength observations of the high-mass gamma-ray binary (HMGB) 4FGL J1405.1−6119. A pair of joint XMM-Newton and NuSTAR observations taken in 2019 (sampling the gamma-ray maximum and X-ray maximum) characterize the emissiong of soft and hard X-rays. We find variability of the hydrogen column density along our line of sight, N H , and photon index, Γ, and find no evidence of pulsations in X-rays. We also refine a new best-fit orbital period to P = 13.7157 ± 0.0014 days, the first orbital phase-resolved analysis based on nearly 16 yr of Fermi-LAT observations of 4FGL J1405.1−6119 and the evolution of the spectral shape as a function of orbital phase. Finally, the X-ray and gamma-ray spectra for the phases sampled in the new X-ray observations can be interpreted in the framework of the intrabinary shock model, previously applied to HMGBs such as LS 5039.

The Astrophysical JournalVol. 986(2)
U.S. Department of Energy, National Aeronautics and Space Administration, California Institute of Technology, University of Leicester, Ministry of Education, Culture, Sports, Science and Technology, Nuclear Safety and Security Commission, Agenzia Spaziale Italiana, Vetenskapsrådet, High Energy Accelerator Research Organization, Istituto Nazionale di Fisica Nucleare, Jet Propulsion Laboratory, Goddard Space Flight Center, Japan Aerospace Exploration Agency, Institut National de Physique Nucléaire et de Physique des Particules
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