Investigation of X-ray emission from the unidentified TeV gamma-ray source HESS J1832–085 with Suzaku

IF 2.8 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Advances in Space Research Pub Date : 2025-03-05 DOI:10.1016/j.asr.2025.02.064

Ebru Aktekin

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Abstract

Observations conducted with H.E.S.S. at high energies have led to the discovery of numerous gamma-ray sources in the Galactic plane at TeV energies. One of these sources, HESS J1832–085, has been suggested to be a pulsar wind nebula (PWN); however, its nature is not yet fully understood. In this work, we analyze Suzaku data to investigate the X-ray spectral properties of HESS J1832–085. We found that the X-ray spectra are highly absorbed and well-represented by a power-law model with a photon index of

Γ \sim 1.5

, and an unabsorbed X-ray flux of

F_{X} \sim 0.3 \times 10^{- 11}

erg cm⁻² s⁻¹ in the 2–10 keV energy band. The gamma-ray flux is approximately 66 times higher than the X-ray flux. Based on our X-ray analysis, we discuss the origin of the source HESS J1832–085. We propose that the PWN scenario is possible, although several issues still need to be resolved.

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未知TeV伽玛射线源HESS J1832-085与Suzaku的x射线发射研究

利用H.E.S.S.在高能量下进行的观测已经导致在银河平面上发现了许多TeV能量的伽马射线源。其中一个源，HESS J1832-085，被认为是一个脉冲星风星云（PWN）；然而，它的性质还没有被完全理解。在这项工作中，我们分析了Suzaku数据，研究了HESS J1832-085的x射线光谱特性。我们发现，x射线光谱被高度吸收，并由光子指数为Γ ~ 1.5的幂律模型很好地表示，在2 - 10 keV能带上，未吸收的x射线通量为FX ~ 0.3×10-11 erg cm−2 s−1。伽马射线的通量大约是x射线通量的66倍。基于我们的x射线分析，我们讨论了源HESS J1832-085的起源。我们认为PWN方案是可能的，尽管仍有几个问题需要解决。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Space Research 地学天文-地球科学综合

CiteScore

5.20

自引率

11.50%

发文量

800

审稿时长

5.8 months

期刊介绍： The COSPAR publication Advances in Space Research (ASR) is an open journal covering all areas of space research including: space studies of the Earth''s surface, meteorology, climate, the Earth-Moon system, planets and small bodies of the solar system, upper atmospheres, ionospheres and magnetospheres of the Earth and planets including reference atmospheres, space plasmas in the solar system, astrophysics from space, materials sciences in space, fundamental physics in space, space debris, space weather, Earth observations of space phenomena, etc. NB: Please note that manuscripts related to life sciences as related to space are no more accepted for submission to Advances in Space Research. Such manuscripts should now be submitted to the new COSPAR Journal Life Sciences in Space Research (LSSR). All submissions are reviewed by two scientists in the field. COSPAR is an interdisciplinary scientific organization concerned with the progress of space research on an international scale. Operating under the rules of ICSU, COSPAR ignores political considerations and considers all questions solely from the scientific viewpoint.