A variable ionized disk wind in the black-hole candidate EXO 1846-031. (arXiv:2010.14662v2 [astro-ph.HE] UPDATED)

A variable ionized disk wind in the black-hole candidate EXO 1846-031. (arXiv:2010.14662v2 [astro-ph.HE] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Wang_Y/0/1/0/all/0/1">Yanan Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ji_L/0/1/0/all/0/1">Long Ji</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Garcia_J/0/1/0/all/0/1">Javier A. Garcia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dauser_T/0/1/0/all/0/1">Thomas Dauser</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mendez_M/0/1/0/all/0/1">Mariano Mendez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mao_J/0/1/0/all/0/1">Junjie Mao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tao_L/0/1/0/all/0/1">L. Tao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Altamirano_D/0/1/0/all/0/1">Diego Altamirano</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Maggi_P/0/1/0/all/0/1">Pierre Maggi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_S/0/1/0/all/0/1">S. N. Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ge_M/0/1/0/all/0/1">M. Y. Ge</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_L/0/1/0/all/0/1">L. Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Qu_J/0/1/0/all/0/1">J. L. Qu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_S/0/1/0/all/0/1">S. Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ma_X/0/1/0/all/0/1">X. Ma</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lu_F/0/1/0/all/0/1">F. J. Lu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_T/0/1/0/all/0/1">T. P. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Huang_Y/0/1/0/all/0/1">Y. Huang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zheng_S/0/1/0/all/0/1">S. J. Zheng</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chang_Z/0/1/0/all/0/1">Z. Chang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tuo_Y/0/1/0/all/0/1">Y. L. Tuo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Song_L/0/1/0/all/0/1">L. M. Song</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Xu_Y/0/1/0/all/0/1">Y. P. Xu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chen_Y/0/1/0/all/0/1">Y. Chen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Liu_C/0/1/0/all/0/1">C. Z. Liu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bu_Q/0/1/0/all/0/1">Q. C. Bu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cai_C/0/1/0/all/0/1">C. Cai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cao_X/0/1/0/all/0/1">X. L. Cao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chen_L/0/1/0/all/0/1">L. Chen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chen_T/0/1/0/all/0/1">T. X. Chen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chen_Y/0/1/0/all/0/1">Y. P. Chen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cui_W/0/1/0/all/0/1">W. W. Cui</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Du_Y/0/1/0/all/0/1">Y. Y. Du</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gao_G/0/1/0/all/0/1">G. H. Gao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gu_Y/0/1/0/all/0/1">Y. D. Gu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Guan_J/0/1/0/all/0/1">J. Guan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Guo_C/0/1/0/all/0/1">C. C. Guo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Han_D/0/1/0/all/0/1">D. W. Han</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Huo_J/0/1/0/all/0/1">J. Huo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jia_S/0/1/0/all/0/1">S. M. Jia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jiang_W/0/1/0/all/0/1">W. C. Jiang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jin_J/0/1/0/all/0/1">J. Jin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kong_L/0/1/0/all/0/1">L. D. Kong</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_B/0/1/0/all/0/1">B. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_C/0/1/0/all/0/1">C. K. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_G/0/1/0/all/0/1">G. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_W/0/1/0/all/0/1">W. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_X/0/1/0/all/0/1">X. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_X/0/1/0/all/0/1">X. B. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_X/0/1/0/all/0/1">X. F. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_Z/0/1/0/all/0/1">Z. W. Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Liang_X/0/1/0/all/0/1">X. H. Liang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Liao_J/0/1/0/all/0/1">J. Y. Liao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Liu_H/0/1/0/all/0/1">H. W. Liu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Liu_X/0/1/0/all/0/1">X. J. Liu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lu_X/0/1/0/all/0/1">X. F. Lu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Luo_Q/0/1/0/all/0/1">Q. Luo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Luo_T/0/1/0/all/0/1">T. Luo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Meng_B/0/1/0/all/0/1">B. Meng</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nang_Y/0/1/0/all/0/1">Y. Nang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nie_J/0/1/0/all/0/1">J. Y. Nie</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ou_G/0/1/0/all/0/1">G. Ou</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sai_N/0/1/0/all/0/1">N. Sai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shang_R/0/1/0/all/0/1">R. C. Shang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Song_X/0/1/0/all/0/1">X. Y. Song</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sun_L/0/1/0/all/0/1">L. Sun</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tan_Y/0/1/0/all/0/1">Y. Tan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_W/0/1/0/all/0/1">W. S. Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_Y/0/1/0/all/0/1">Y. D. Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_Y/0/1/0/all/0/1">Y. S. Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wen_X/0/1/0/all/0/1">X. Y. Wen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wu_B/0/1/0/all/0/1">B. B. Wu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wu_B/0/1/0/all/0/1">B. Y. Wu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wu_M/0/1/0/all/0/1">M. Wu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Xiao_G/0/1/0/all/0/1">G. C. Xiao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Xiao_S/0/1/0/all/0/1">S. Xiao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Xiong_S/0/1/0/all/0/1">S. L. Xiong</a>, et al. (14 additional authors not shown)

After 34 years, the black-hole candidate EXO 1846-031 went into outburst
again in 2019. We investigate its spectral properties in the hard intermediate
and the soft states with NuSTAR and Insight-HXMT. A reflection component has
been detected in the two spectral states but possibly originating from
different illumination spectra: in the intermediate state, the illuminating
source is attributed to a hard coronal component, which has been commonly
observed in other X-ray binaries, whereas in the soft state the reflection is
probably produced by the disk self-irradiation. Both cases support EXO 1846-031
as a low inclination system of ~40 degrees. An absorption line is clearly
detected at ~7.2 keV in the hard intermediate state, corresponding to a highly
ionized disk wind (log {xi} > 6.1) with a velocity up to 0.06c. Meanwhile,
quasi-simultaneous radio emissions have been detected before and after the
X-rays, implying the co-existence of disk winds and jets in this system.
Additionally, the observed wind in this source is potentially driven by
magnetic forces. The absorption line disappeared in the soft state and a narrow
emission line appeared at ~6.7 keV on top of the reflection component, which
may be evidence for disk winds, but data with the higher spectral resolution
are required to examine this.

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