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

Alexander Lange; Robin H.D. Corbet; Joel B. Coley; Guillaume Dubus; Jeremy Hare; Nazma Islam; Jonathan Barnes

doi:10.3847/1538-4357/adda32

The Astrophysical Journal (Jan 2025)

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

Alexander Lange,
Robin H.D. Corbet,
Joel B. Coley,
Guillaume Dubus,
Jeremy Hare,
Nazma Islam,
Jonathan Barnes

Affiliations

Alexander Lange: ORCiD; Department of Physics, The George Washington University , 725 21st Street NW, Washington, DC 20052, USA; X-ray Astrophysics Laboratory, Code 662, NASA Goddard Space Flight Center , Greenbelt Road, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
Robin H.D. Corbet: ORCiD; X-ray Astrophysics Laboratory, Code 662, NASA Goddard Space Flight Center , Greenbelt Road, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA; CRESST II , USA
Joel B. Coley: ORCiD; CRESST II , USA; Department of Physics and Astronomy, Howard University , Washington, DC 20059, USA; Astroparticle Physics Laboratory, Code 661, NASA Goddard Space Flight Center , Greenbelt Road, MD 20771, USA
Guillaume Dubus: ORCiD; Univ. Grenoble Alpes , CNRS, IPAG, 38000 Grenoble, France
Jeremy Hare: ORCiD; X-ray Astrophysics Laboratory, Code 662, NASA Goddard Space Flight Center , Greenbelt Road, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA; The Catholic University of America , 620 Michigan Avenue NE, Washington, DC 20064, USA
Nazma Islam: ORCiD; X-ray Astrophysics Laboratory, Code 662, NASA Goddard Space Flight Center , Greenbelt Road, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
Jonathan Barnes: Department of Physics and Astronomy, Howard University , Washington, DC 20059, USA

DOI: https://doi.org/10.3847/1538-4357/adda32
Journal volume & issue: Vol. 986, no. 2
p. 181

Abstract

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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.

Published in The Astrophysical Journal

ISSN: 1538-4357 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy: Astrophysics
Website: https://iopscience.iop.org/journal/0004-637X

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