Publication
The Evolution of the Broadband Temporal Features Observed in the Black-hole Transient MAXI J1820+070 with Insight-HXMT
Wang, Y., Ji, L., Zhang, S., Méndez, M., Qu, J. L., Maggi, P., Ge, M. Y., Qiao, E., Tao, L., Zhang, S., Altamirano, D., Zhang, L., Ma, X., Lu, F. J., Li, T. P., Huang, Y., Zheng, S. J., Chen, Y., Chang, Z., Tuo, Y. L., Güngör, C., Song, L. M., Xu, Y. P., Cao, X. L., Chen, Y., Liu, C. Z., Bu, Q. C., Cai, C., Chen, G., Chen, L., Chen, T. X., Chen, Y., Cui, W. W., Cui, W. W., Deng, J. K., Dong, Y. W., Du, Y. Y., Fu, M. X., Gao, G. H., Gao, H., Gao, M., Gu, Y. D., Guan, J., Guo, C. C., Han, D. W., Huo, J., Jia, S. M., Jiang, L. H., Jiang, W. C., Jin, J., Jin, Y. J., Kong, L. D., Li, B., Li, C. K., Li, G., Li, M. S., Li, W., Li, X. B., Li, X. B., Li, X. B., Li, Y. G., Li, Z. W., Liang, X. H., Liao, J. Y., Liu, G. Q., Liu, H. W., Liu, X. J., Liu, Y. N., Lu, B., Lu, X. F., Luo, Q., Luo, T., Meng, B., Nang, Y., Nie, J. Y., Ou, G., Sai, N., Shang, R. C., Song, X. Y., Sun, L., Tan, Y., Wang, G. F., Wang, J., Wang, W. S., Wang, Y. S., Wang, Y. S., Wen, X. Y., Wu, B. Y., Wu, B. Y., Wu, M., Xiao, G. C., Xiao, S., Xiong, S. L., Yang, J. W., Yang, S., Yang, Y. J., Yang, Y. J., Yi, Q. B., Yin, Q. Q., You, Y., Zhang, A. M., Zhang, C. M., Zhang, F., Zhang, H. M., Zhang, J., Zhang, T., Zhang, W., Zhang, W., Zhang, W., Zhang, Y., Zhang, Y., Zhang, Y., Zhang, Y., Zhang, Z., Zhang, Z., Zhang, Z., Zhao, H. S., Zhao, X. F., Zhou, D. K., Zhou, J. F., Zhuang, R. L., Zhu, Y. X., Zhu, Y. X. & Wang, L., 1-Jun-2020, In : The Astrophysical Journal. 896, 1, 8 p., 33.Research output: Contribution to journal › Article › Academic › peer-review
We study the evolution of the temporal properties of MAXI J1820+070
during the 2018 outburst in its hard state from MJD 58,190 to 58,289
with Insight-HXMT in a broad energy band 1-150 keV. We find different
behaviors of the hardness ratio, the fractional rms and time lag before
and after MJD 58,257, suggesting a transition occurred around this
point. The observed time lags between the soft photons in the 1-5 keV
band and the hard photons in higher energy bands, up to 150 keV, are
frequency-dependent: the time lags in the low-frequency range, 2-10 mHz,
are both soft and hard lags with a timescale of dozens of seconds but
without a clear trend along the outburst; the time lags in the
high-frequency range, 1-10 Hz, are only hard lags with a timescale of
tens of milliseconds; they first increase until around MJD 58,257 and
decrease after this date. The high-frequency time lags are significantly
correlated to the photon index derived from the fit to the
quasi-simultaneous NICER spectrum in the 1-10 keV band. This result is
qualitatively consistent with a model in which the high-frequency time
lags are produced by Comptonization in a jet.
| Original language | English |
|---|---|
| Article number | 33 |
| Number of pages | 8 |
| Journal | The Astrophysical Journal |
| Volume | 896 |
| Issue number | 1 |
| Publication status | Published - 1-Jun-2020 |
- Black holes, Compact objects, Low-mass x-ray binary stars
Keywords
ID: 128290734