Details

Autor(en) / Beteiligte

• Tam, Pak-Hin Thomas
• Lee, K. K.
• Cui, Yudong
• Hu, C. P.
• Kong, A. K. H.
• Li, K. L.
• Tudor, Vlad
• He, Xinbo
• Pal, Partha S.

Titel

A Multiwavelength Study of the γ-Ray Binary Candidate HESS J1832-093

Ist Teil von

• The Astrophysical journal, 2020-08, Vol.899 (1), p.75

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2020

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 ( ), 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 ( ), 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.