The 2018 failed outburst of H 1743 – 322: Insight-HXMT, NuSTAR, and NICER views
Author:
Wang P J12, Kong L D12, Chen Y P1, Zhang S1, Zhang S N12, Soria R34ORCID, Ji L56ORCID, Qu J L12, Huang Y1, Tao L1, Ge M Y1, Lu F J1, Chen L7, Li T P128, Xu Y P12, Cao X L1, Chen Y1, Liu C Z1, Bu Q C16, Cai C12, Chang Z1, Chen T X1, Chen Y B9, Cui W W1, Du Y Y1, Gao G H12, Gao H12, Gu Y D1, Guan J1, Guo C C12, Han D W1, Huo J1, Jia S M12, Jiang W C1, Jin J1, Li B1, Li C K1, Li G1, Li W1, Li X1, Li X B1, Li X F1, Li Z W1, Liang X H1, Liao J Y1, Liu B S1, Liu H X12, Liu H W1, Liu X J1, Lu X F1, Luo Q12, Luo T1, Ma R C12, Ma X1, Meng B1, Nang Y12, Nie J Y1, Ou G10, Ren X Q12, Sai N12, Song L M12, Song X Y1, Sun L1, Tan Y1, Tuo Y L12, Wang C211, Wang L J1, Wang W S10, Wang Y S1, Wen X Y1, Wu B Y12, Wu B B1, Wu M1, Xiao G C12, Xiao S12, Xiong S L1, Yang R J12, Yang S1, Yang Yan Ji1, Yang Yi Jung1, Yi Q B113, Yin Q Q1, You Y12, Zhang F1, Zhang H M1, Zhang J1, Zhang P1, Zhang W C1, Zhang W12, Zhang Y F1, Zhang Y H12, Zhao H S1, Zhao X F12, Zheng S J1, Zheng Y G112, Zhou D K12
Affiliation:
1. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China 2. University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100049, China 3. Department of Physics, Tsinghua University , Beijing 100084, China 4. Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100012, China 5. College of physics Sciences & Technology, Hebei University , Baoding 071002, Hebei Province, China 6. Computing Division, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China 7. College of Astronomy and Space Sciences, University of the Chinese Academy of Sciences , Beijing 100049, China 8. Sydney Institute for Astronomy, School of Physics A28, The University of Sydney , Sydney, NSW 2006, Australia 9. School of Physics and Optoelectronics, Xiangtan University , Xiangtan 411105, China 10. School of Physics and Astronomy, Sun Yat-Sen University , Zhuhai, 519082, China 11. Institut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Eberhard Karls Universität , 72076 Tübingen, Germany 12. Department of Astronomy, Beijing Normal University , Beijing 100088, China 13. Department of Astronomy, Tsinghua University , Beijing 100084, China
Abstract
ABSTRACT
We studied the 2018 outburst of the black hole transient H 1743 − 322 with a series of Insight-HXMT, NICER, and NuSTAR observations, covering the 1–120 keV band. With our broad-band X-ray spectral modelling, we confirm that the source remained in the low/hard state throughout the month-long outburst, although it became marginally softer at peak flux. We detected Type-C quasi-periodic oscillations (QPOs) and followed the evolution of their properties. The QPO frequency increased from ∼0.1 to ∼0.4 Hz during the rising phase of the outburst and decreased again in the decline. Continuum X-ray flux, power-law photon index, QPO frequency, and QPO root-mean-square amplitude were positively correlated. The QPO amplitude was slightly higher in the soft X-ray band (typical values of 12–16 per cent, compared with 8–10 per cent in the hard band). Our spectral-timing results shed light on the initial rising phase in the low/hard state, which has rarely been monitored with such high cadence, time resolution, and broad-band coverage. Combining spectral and timing properties, we find that ‘failed’ (hard state only) and ‘successful’ outbursts follow the same initial evolutionary track, although the former class of outburst never reaches the threshold for a transition to softer (thermally dominated) accretion regimes.
Funder
National Key Research and Development Program of China National Natural Science Foundation of China CNSA Chinese Academy of Sciences
Publisher
Oxford University Press (OUP)
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
9 articles.
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