TY - JOUR
T1 - A Multiwavelength Study of the γ-Ray Binary Candidate HESS J1832-093
AU - Tam, Pak Hin Thomas
AU - Lee, K. K.
AU - Cui, Yudong
AU - Hu, C. P.
AU - Kong, A. K.H.
AU - Li, K. L.
AU - Tudor, Vlad
AU - He, Xinbo
AU - Pal, Partha S.
N1 - Publisher Copyright:
© 2020. The American Astronomical Society. All rights reserved.
PY - 2020/8/10
Y1 - 2020/8/10
N2 - We investigate the nature of the unidentified very-high-energy γ-ray object, HESS J1832-093, in a multiwavelength context. Based on X-ray variability and spectral index (ΓX∼ 1.5), and its broadband spectrum, which was remarkably similar to that of HESS J0632+057-a confirmed γ-ray binary-HESS J1832-093 has been considered a strong γ-ray binary candidate in previous works. In this work, we provide further evidence for this scenario. We obtained a spectrum of its IR counterpart using Gemini/Flamingo, finding absorption lines that are usually seen in massive stars, in particular O stars. We also obtained a rather steep ATCA spectrum (α =-1.18-0.88+1.04), which is consistent with a γ-ray binary. Based on spatial-spectral analysis and variability search, we found that 4FGL J1832.9-0913 is possibly associated with SNR G22.7-0.2 rather than with HESS J1832-093 only.
AB - We investigate the nature of the unidentified very-high-energy γ-ray object, HESS J1832-093, in a multiwavelength context. Based on X-ray variability and spectral index (ΓX∼ 1.5), and its broadband spectrum, which was remarkably similar to that of HESS J0632+057-a confirmed γ-ray binary-HESS J1832-093 has been considered a strong γ-ray binary candidate in previous works. In this work, we provide further evidence for this scenario. We obtained a spectrum of its IR counterpart using Gemini/Flamingo, finding absorption lines that are usually seen in massive stars, in particular O stars. We also obtained a rather steep ATCA spectrum (α =-1.18-0.88+1.04), which is consistent with a γ-ray binary. Based on spatial-spectral analysis and variability search, we found that 4FGL J1832.9-0913 is possibly associated with SNR G22.7-0.2 rather than with HESS J1832-093 only.
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U2 - 10.3847/1538-4357/ab9e76
DO - 10.3847/1538-4357/ab9e76
M3 - Article
AN - SCOPUS:85090572102
VL - 899
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 75
ER -