Shanghai Jiao Tong University Physics and Astronomy Academic Innovation Forum for Doctoral Students

Session

Astro Session I

10 Dec 2021, 10:20

Tsung-Dao Lee Institute

4. 81 New Candidate Fast Radio Bursts in Parkes Archive

Xuan Yang (purple mountain observatory)

10/12/2021, 10:20

We have searched for weak fast radio burst (FRB) events using a database containing 568,736,756 transient events detected using the Parkes radio telescope between 1997 and 2001. In order to classify these pulses, and to identify likely FRB candidates, we used a machine learning algorithm based on ResNet. We identified 81 new candidate FRBs and provide details of their positions, event times,...

5. Blob formation and ejection from the radiative inefficient accretion flow around massive black hole

TianLe Zhao (University of Science and Technology of China)

10/12/2021, 10:40

We study the small scale magnetic reconnection above the radiative inefficient accretion flow around massive black hole via 2D magnetohydrodynamics (MHD) numerical simulation, in order to model the blob formation and ejection from the accretion flow around Sgr A*. The connection of both the newly emerging magnetic field and the pre-existing magnetic field is investigated to check whether blobs...

6. The luminosity and redshift distributions of long gamma-ray bursts

Ms Guangxuan Lan (PMO)

10/12/2021, 11:00

Gamma-ray bursts (GRBs) are the most luminous explosive transients in the cosmos. Generally, long GRBs (LGRBs) with durations $T_{90}$>2s are believed to be powered by the core collapse of massive stars then thus suggested to be excellent tools to probe the star formation rate (SFR) at high redshifts. However, base on the studies over the last two decades, there is a general agreement on the...

9. Cross-correlation of Planck CMB lensing with DESI galaxy groups

Ms Zeyang Sun (SJTU)

10/12/2021, 11:20

We measure the cross-correlation between galaxy groups constructed from DESI Legacy Imaging Survey DR8 (Yang et al. 2021) and Planck CMB lensing, over overlapping sky area of 16876 deg2. The detections are significant and consistent with the expected signal of the large scale structure of the universe, over group samples of various redshift, mass and richness Ng and over various scale cuts....

11. BIASED TRACER RECONSTRUCTION WITH HALO MASS INFORMATION

Mr Yu Liu (Department of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai)

10/12/2021, 11:40

Plenty of crucial information about our Universe is encoded in the cosmic large-scale structure (LSS). However, the extractions of these information are usually hindered by the nonlinearities of the LSS, which can be largely alleviated by various techniques known as the reconstruction. In realistic applications, the efficiencies of these methods are always degraded by many limiting factors, a...