Capability of Searching for Kilonova Associated with a Short Gamma-Ray Burst by SVOM  

作　　者：J.Wang L.P.Xin Y.L.Qiu L.Lan W.J.Xie Z.P.Jin J.Y.Wei 

机构地区：[1]Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Nanning 530004,China [3]Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China

出　　处：《Research in Astronomy and Astrophysics》2024年第11期71-75,共5页天文和天体物理学研究（英文版）

基　　金：supported by the Strategic Pioneer Program on Space Science,Chinese Academy of Sciences,grant XDB0550401;supported by the National Natural Science Foundation of China(NSFC,grant No.12173009);by the Natural Science Foundation of Guangxi(2020GXNSFDA238018);by the Bagui Young Scholars Program;supported by the National Postdoctoral Program for Innovative Talents(grant No.GZB20230765)。

摘　　要：In spite of the importance of studying the cosmic generation of heavy elements through the r-process,the detection of a kilonova resulting from the merger of a neutron star binary is still a challenging task.In this paper,we show that the Visible Telescope(VT)onboard the ongoing SVOM space mission is powerful for identifying kilonova candidates associated with short gamma-ray bursts up to a distance of 600 Mpc.A significant color variation,turning blue and then turning red,is revealed by calculating the light curves in both red and blue channels of VT by a linear combination of an afterglow and an associated kilonova.The maximum color variation is as high as~0.5-1 mag,which is far larger than the small photometry error of~0.2 mag of VT for a point source with a brightness of 23 mag.Up to a distance of 600 Mpc,~1-2 kilonova candidates per year are predicted to be identified by VT.

关 键 词：INSTRUMENTATION photometers-telescopes-stars neutron-(stars:)gamma-ray burst general 

分 类 号：P172.3[天文地球—天文学]