发稿时间:2019-01-02浏览次数:13

USTC Astronomy Seminar Series: Fall
Correlated Noise and Frequency Second Derivative in Precision Pulsar Timing
刘小金  博士
University of Manchester
2019/01/03, 4:00pm , the 19th-floor Observatory Hall
Precision pulsar timing provides a powerful tool to probe pulsar emission, interstellar mediums, gravitational theories and low-frequency gravitational waves. An important issue in the pulsar timing is the rotational stability, which lays the foundation of precision timing. Spatial motions such as radial velocity affects the apparent pulsar rotation by contributing to a frequency second derivative to the pulsar spin. This kinematic effect was analysed in previous studies by assuming none-correlated timing noise, which is problematic in most cases. In this talk, I will focus on the correlated timing noise and discuss its impacts on constraining the frequency second derivative. Using the new constrains on this spin parameter, I will talk about applications to study the millisecond pulsars in the pulsar timing array.
 刘小金:Xiao-Jin Liu is a graduate student of the Jodrell Bank Centre for Astrophysics at the University of Manchester since 2016. Xiao-Jin obtained his M.S. degree in Astronomy from University of Science and Technology of China in 2016, and his primary research interest is pulsar timing and gravitational waves.