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Posts
Bugs in codes installation and compilation
Published:
在这里我记录下安装和编译软件时遇到的所有bug。
法国CSC全流程记录
Published:
在这里我分享一下我申请CSC联培，前往法国Laboratoire d’Astrophysique de Bordeaux (LAB) 交流的全过程。本记录仅供参考，需配合小红书使用，CSC的流程和手续可能每年都不太一样，具体情况还是要与负责老师联系。
cm/mm/sub-mm/IR telescopes available to Chinese Researchers
Published:
In this blog, I list and introduce some telescopes working in the centimeter/millimeter/sub-millimeter/infrared bands whose calls for proposal are open to Chinese researchers. Please note that the avialable instruments may change in different semester. Please refer to the official websites for more detailed and accurate information.
How to combine RADEX and MCMC
Published:
RADEX (van der Tak et al. 2007) is a simple but powerful code to solve non-LTE radiative transfer, and has been widely used in various astronomical environments. Generally, we use this code to fit the physical parameters of a molecular cloud with multiple transitions of a single molecular species. When fitting the data, we tend to minimize a loss function (or something similar), and MCMC (Markov chain Monte Carlo) is a powerful method to get the global minimum (instead of local minimum, which is the drawback of other methods like scipy.optimize.curve_fit whose fitting results strongly depend on the initial values given by the user) and a robust estimation of the error.
portfolio
Portfolio item number 1
Short description of portfolio item number 1
Portfolio item number 2
Short description of portfolio item number 2
publications
M31N 2019-09d and M31N 2022-03d are Confirmed as the Second and Third Observed Eruptions of the Recurrent Nova M31N 2017-01e
Authors: Allen W. Shafter, Kamil Hornoch, Jingyuan Zhao, Tianyu Tu, Jianlin Xu, Mi Zhang, Jiangao Ruan, Guoyou Sun, Yi Ding, Xing Gao. Published in ATel #15729, 2022
Identification of a recurrent Nova in M31
Shock and Cosmic Ray Chemistry Associated with the Supernova Remnant W28
Authors: Tian-Yu Tu, Yang Chen, Ping Zhou, Samar Safi-Harb, Qian-Cheng Liu. Published in ApJ, 2024
HCO+, HCN and HNC observation towards W28, with chemical simulations. Enhanced HCO+/CO abundance ratio in shocked gas.
A Yebes W-band Line Survey towards an Unshocked Molecular Cloud of Supernova Remnant 3C391: Evidence of Cosmic-Ray-Induced Chemistry
Authors: Tian-Yu Tu, Prathap Rayalacheruvu, Liton Majumdar, Yang Chen, Ping Zhou, Miguel Santander-García. Published in ApJ, 2024
Yebes W band line suevey towards 3C391, with abnormal molecular abundance (ratios) and probable enhanced CR ionization rate.
Mapping the dense molecular gas towards thirteen supernova remnants
Authors: Tian-Yu Tu, Yang Chen, Qian-Cheng Liu. Published in ApJ, 2024
HCO+ and HCN 1-0 observations towards 13 supernova remnants
Expanding molecular shell and possible γ-ray source associated with supernova remnant kesteven 67
Authors: Yun-Zhi Shen, Yang Chen, Xiao Zhang, Tian-Yu Tu, Wen-Juan Zhong, Qian-Qian Zhang, Qian-Cheng Liu. Published in MNRAS, 2025
HCO+ 1-0 and Fermi GeV observations of SNR Kes 67
Molecular chemistry induced by J-shock toward supernova remnant W51C
Authors: Tian-Yu Tu, Valentine Wakelam, Yang Chen, Ping Zhou, and Qian-Qian Zhang. Published in A&A, 2025
J-shock could enhance the abundance ratios between short carbon chains and CO toward SNR W51C.
talks
Shock and Cosmic Ray Chemistry in Supernova Remnant W28
Published:
The slides of the talk can be found here.
For more information of the conference, please visit here.
Shock and Cosmic Ray Chemistry in Supernova Remnant W28
Published:
The slides of the talk can be found here, which is almost identical to that of the previous conference.
For more information of the conference, please visit here.
A Yebes W band line survey towards Supernova remnant 3C391: Evidence of CR-induced chemistry
Published:
The slides of the talk can be found here.
For more information of the conference, please visit here.
A Yebes W band line survey towards Supernova remnant 3C391: Evidence of CR-induced chemistry
Published:
The poster can be found here.
For more information of the conference, please visit here.
Chemistry induced by cosmic rays towards supernova remnants W28 and 3C391
Published:
The slides of the talk can be found here.
For more information of the conference, please visit here.
teaching
Teaching experience 1
Undergraduate course, University 1, Department, 2014
This is a description of a teaching experience. You can use markdown like any other post.
Teaching experience 2
Workshop, University 1, Department, 2015
This is a description of a teaching experience. You can use markdown like any other post.