Shanghai Astronomical Observatory Astrophysics Colloquium

Title：Improving the detection sensitivity to primordial gravitational waves with reduced astrophysical backgrounds

Speaker：Zhen Pan (Shanghai Jiao Tong University)

Time：3:00 pm March. 14th (Thursday)

Tencent Meeting：42915400486 password: 6360

Location: Lecture Hall, 3rd floor

Report in English

Abstract：

Primordial gravitational waves from early universe processes are a unique probe to the universe at the earliest moments, therefore detecting the primordial stochastic gravitational wave background (SGWB) has been one of the major targets of GW mission at different frequency bands. To better measure the primordial SGWB, we must clean the astrophysical foreground from compact binaries. In this talk, I will focus the foreground cleaning problem for third-generation (3G) ground based detectors. With a 3G detector network, most of binary black holes (BBHs) and a fraction of binary neutron stars (BNSs) in the universe are sufficiently loud to be individually detected, and their contribution to the foreground can be cleaned in an event-to-event approach. The remaining BNSs that are below the detection threshold, and their contribution to the foreground can be cleaned in a population based approach.

CV：Dr. Zhen Pan got his Ph.D of cosmology at University of California, Davis at 2018. He did his postdoc at Perimeter Institute for Theoretical Physics from 2018 to 2023. Then he joined the faculty of T.D. Lee Institute, and the Department of Astronomy, Shanghai Jiao Tong University. 

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