Astrophysics

My research is about understanding molecular outflows in the star formation process. Comparing numerical simulation with observational data through synthetic imaging.

Activities #

• 2018 Research Assistant, Institute of Astronomy and Astrophysics, Academia Sinica
• 2015 - 2016 Visiting Research Student, UC Berkeley, USA
  • Supported by Graduate Student Study Abroad Program, MoST, Taiwan
• 2013 - 2015 Teaching Assistant, General Physics Laboratory, National Taiwan University (2013-2015)
• 2007 Summer Student, Institute of Astronomy and Astrophysics, Academia Sinica

Research Article #

1. Ejection History of IRAS 04166+2706 Molecular jet / The Astrophysical Journal, 2019, 874:31 (12pp)/ L.-Y. Wang, H. Shang, T.-Y. Chiang [ApJ link]
2. A Two-Temperature Model of Magnetized Protostellar Outflows / The Astrophysical Journal, 2015, 815:39 (12pp) / L.-Y. Wang, H. Shang, R. Krasnopolsky, T.-Y. Chiang. [ADS link]
3. Molecular Jet of IRAS 04166+2706/ The Astrophysical Journal, 2014, 780:49 (14pp) / L.-Y. Wang, H. Shang, Y.-N. Su, J. Santiago-García, M. Tafalla, Q. Zhang, N. Hirano, C.-F. Lee [ADS link]

Participated

1. Anatomy of the internal bow shocks in the IRAS 04166+2706 protostellar jet / Journal of Astronomy and Astrophysics, 2017, 597:119. M. Tafalla, Y.-N. Su, H. Shang, D. Johnstone, Q. Zhang, J. Santiago-García, C.-F. Lee, N. Hirano, and L.-Y. Wang [ADS link]

Conference Contribution #

Oral

1. [2017.07] Synthetic Features of Protostellar Outflows / Asia-Pacific Regional IAU Meeting (APRIM); Taipei, Taiwan
2. [2016.05] A Two-temperature Model of Magnetized Protostellar Outflows / Annual Meeting 2016, Astronomy Society of R.O.C. (ASROC); Tainan, Taiwan
3. [2015.01] Exploring Properties of Class 0 Molecular Outflows With The Unified Wind Model / East Asia Young Astronomer Meeting 2015 (EAYAM); Taipei, Taiwan
4. [2013.01] Molecular jet of IRAS 04166+2706 / Annual Meeting 2013, Physics Society of R.O.C.; Hualien, Taiwan
5. [2012.05] Molecular jet of IRAS 04166+2706 / Annual Meeting 2012, Astronomy Society of R.O.C. (ASROC); Taitun, Taiwan

Poster

1. [2016.07] A Two-temperature Model of Magnetized Protostellar Outflows (poster) / Star Formation in Different Environment; Qui Nhon, Vietnam
2. [2012.03] Molecular jet of IRAS 04166+2706 / ALMA/NAASC 2012 Workshop: Outflows, Winds, and Jets; Charlottesville, Virginia, U.S.A.

Code Development #

I have authored three coding projects to meet the need of my own research. They are not made publicly available due to group policy.

1. synline (C++)
   Synline is a program written in C++ that performs raytracing along the line-of-sight direction for molecular emission lines. It takes 2D axisymmetric simulation result from the Magnetohydrodynamic simulation code Zeus-TW (in spherical coordinate) and outputs synthetic image cubes for imaging and analysis.

   • An Array class is written as the basic data structure.
   • MPI parallel computing is leveraged to speed up the computation.

2. outflow_visualization (MATLAB)
   Outflow_visualization projects contain MATLAB functions for visualizing and analyzing outflow simulations from (1) the Zeus-TW program and (2) post-processed synthetic images generated by the synline program.

3. chemistry-Mate (Python)
   Utility codes that help us work with the chemical evolution code by our collaborator Máté Ádámkovics. It includes (1) a parser to parse and convert the reactions network file into a python code kinetic.py for computation, and (2) simple visualizing scripts to examine the output abundances.

Skills #

• Research and analysis
• Language: Mandarin, English
• Programming language: C++, Python, MATLAB
• Tools: numpy, pandas, scikit-learn, tensorflow
• Others: \(\LaTeX\), R