A1 Journal article – refereed

Insight-HXMT insight into switch of the accretion mode: The case of the X-ray pulsar 4U 1901+03

List of Authors: Zhu Y.X., Zhou J.F., Zhuang R.L., Zhu Y., Tuo Y.L., Ji L., Tsygankov S.S., Song L.M., Mihara T., Nabizadeh A., Ge M.Y., Qu J.L., Tao L., Zhang S., Zhang Y., Bu Q.C., Zhang S.N., Xu Y.P., Chen L., Chen Y., Cao X.L., Cai C., Liu C.Z., Chen T.X., Chen Y.B., Chang Z., Chen G., Cui W.W., Deng J.K., Chen Y.P., Cui W., Fu M.X., Gao G.H., Dong Y.W., Du Y.Y., Gu Y.D., Guan J., Gao H., Gao M., Huo J., Huang Y., Han D.W., Guo C.C., Jin J., Jiang W.C., Jiang L.H., Jia S.M., Li C.K., Li B., Kong L.D., Jin Y.J., Li W., Li T.P., Li M.S., Li G., Li Z.W., Liang X.H., Liao J.Y., Liu B.S., Li X., Li X.B., Li X.F., Li Y.G., Lu B., Lu F.J., Lu X.F., Luo Q., Liu G.Q., Liu H.W., Liu X.J., Liu Y.N., Ou G., Nie J.Y., Shang R.C., Sai N., Ma X., Luo T., Nang Y., Meng B., Wang J., Wang G.F., Wang Y.S., Wang W.S., Sun L., Song X.Y., Wang C., Tan Y., Xiong S.L., Yang J.W., Xiao G.C., Xiao S., Wu B.B., Wu M., Wen X.Y., Wu B.Y., Zhang C.M., Zhang F., You Y., Zhang A.M., Yi Q.B., Yin Q.Q., Yang S., Yang Y.J., Zhang Y.J., Zhang Y.F., Zhang W.Z., Zhang W.C., Zhang W., Zhang T., Zhang J., Zhang H.M., Zhou D.K., Zheng Y.G., Zheng S.J., Zhao X.F., Zhao H.S., Zhang Z.L., Zhang Z., Zhang Y.H.

Publisher: Elsevier B.V.

Publication year: 2020

Journal: Journal of High Energy Astrophysics

Journal name in source: Journal of High Energy Astrophysics

Volume number: 27

Number of pages: 6

ISSN: 2214-4048

DOI: http://dx.doi.org/10.1016/j.jheap.2020.03.003


We use the Insight-HXMT data collected during the 2019 outburst from X-ray pulsar 4U 1901+03 to complement the orbital parameters reported by Fermi/GBM. Using the Insight-HXMT,
we examine the correlation between the derivative of the intrinsic spin
frequency and bolometric flux based on accretion torque models. It was
found that the pulse profiles significantly evolve during the outburst.
The existence of two types of the profile's pattern discovered in the Insight-HXMT
data indicates that this source experienced transition between a
super-critical and a sub-critical accretion regimes during its 2019
outburst. Based on the evolution of the pulse profiles and the torque
model, we derive the distance to 4U 1901+03 as 12.4 ± 0.2 kpc. 12.4±0.2kpc" role="presentation">

Last updated on 2021-24-06 at 11:50