The Radio Astrophysics Research group at NARIT explores the life of stars and galaxies both in observations and theories. In the observations, we mainly utilize radio telescopes as single-dish and Very-Long-Baseline-Interferometry (VLBI) ways to address the wide-variety research objectives in world-wide collaborations. This is also a base ground to achieve multi-wavelength studies particularly with optical/infrared facilities as essential as in the multi-messenger era. These activities have been the solid basis to drive forward a national flagship project at NARIT, Thai National Radio Astronomy Observatory (TNRO), via launching science operations of the 40-m Thai National Radio Telescope (TNRT) and the 13-m VLBI Global Observing System (VGOS) radio station. The key sciences potentially achievable and polished up with the 40-m TNRT and the future collaboration within framework of VLBI were published as the white paper in online arXiv (astro-ph): Jaroenjittichai, Sugiyama, Kramer, Soonthornthum, et al (2022, arXiv:2210.04926). In addition, the 1st Call for Proposals (CfP) of the 40-m TNRT as cycle 0 in a Resident Shared Risk Observing style was officially announced on 10th October 2023, TST 10:00 eventually (https://indico.narit.or.th/event/197/), based on excellent team work with the TNRO project members. These developments will be the solid foundation to establish forthcoming regional VLBI networks in the next 5 years: Thai National VLBI Array (TVA) and South-East Asia VLBI Network in collaboration with Indonesia, Malaysia, and Vietnam.

Star formation:

• Early evolutionary phase of high-mass star formation with a probe MASER and thermal molecular line emissions 
• Constructing 3-dimensional theoretical models to explain the maser pumping scheme and the mechanism of characteristic flux variability and of characteristic magnetic-field behavior.

Pulsar and evolved star

• Magnetospheric switching in intermittent and moding pulsars, and revealing the mode and profiles of radio pulsars
• Polarization study of SiO maser emission with 3-dimensional polarization simulation
• Achieve accurate measurement of the evolved star distance based on MASER shell phase-lag method

The Milky Way Galaxy structure:

• Determine astronomical source distances in the Galaxy
• Research tectonic plates of two different Eurasian and Sunda plates

Research team

Facilities

Links that accesses to the web-pages of facilities related to our radio research but not operated by NARIT:

1. East Asia VLBI Network (EAVN): https://radio.kasi.re.kr/eavn/main.php
2. Very Long Baseline Array (VLBA): https://public.nrao.edu/telescopes/vlba/
3. Long Baseline Array (LBA): https://www.atnf.csiro.au/vlbi/overview/index.html
4. European VLBI Network (EVN): https://www.evlbi.org/
5. VLBI Exploration of Radio Astrometry (VERA): https://www.miz.nao.ac.jp/veraserver/
6. Japanese VLBI Network: http://astro.sci.yamaguchi-u.ac.jp/jvn/eng/index_e.html
7. Korean VLBI Network (KVN): https://radio.kasi.re.kr/kvn/main.php
8. Ibaraki 32-m radio telescope: http://www.asec.ibaraki.ac.jp/index.php?id=24
9. Yamaguchi 32-m radio telescope: http://astro.sci.yamaguchi-u.ac.jp/
10. Effelsberg 100-m radio telescope: https://www.mpifr-bonn.mpg.de/en/effelsberg
11. Parkes 64-m radio telescope: https://www.csiro.au/en/about/facilities-collections/atnf/parkes-radio-telescope-murriyang
12. TRAO 13.7-m radio telescope: https://trao.kasi.re.kr/main.php
13. James Clerk Maxwell Telescope (JCMT): https://www.eaobservatory.org/jcmt/
14. enhanced Multi-Element Radio Linked Interferometer Network (e-MERLIN): https://www.e-merlin.ac.uk/
15. Australia Telescope Compact Array (ATCA): https://www.narrabri.atnf.csiro.au/
16. upgraded Giant Metrewave Radio Telescope (uGMRT): http://www.gmrt.ncra.tifr.res.in/
17. Atacama Large Millimeter/submillimeter Array (ALMA): https://www.almaobservatory.org/en/home/
18. Gaia: https://www.esa.int/Science_Exploration/Space_Science/Gaia

Collaborators

• องค์กร East Asia VLBI Network (EAVN)
• องค์กร European VLBI Network (EVN)
• องค์กร Long Baseline Array (LBA)
• องค์กร East Asian Observatory (EAO)
• Chiangmai University, Thailand
• Chulalongkorn University, Thailand
• มหาวิทยาลัยมหิดล
• สถาบันมาตรวิทยาแห่งชาติ
• สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง
• Max-Planck-Institut für Radioastronomie (MPIfR), Germany
• Shanghai Astronomical Observatory (SHAO), Chinese Academy of Science (CAS), China
• Yebes Observatory, National Geographic Institute (IGN), Spain
• Jodrell Bank Centre for Astrophysics (JBCA), the United Kingdom
• National Astronomical Observatory of Japan (NAOJ), Japan
• National Institute of Information and Communications Technology (NICT), Japan
• Korea Astronomy and Space Science Institute (KASI), Republic of Korea
• National Geographic Information Institute, Republic of Korea
• Xinjiang Astronomical Observatory (XAO), CAS, China
• Yunnan Astronomical Observatory (YNAO), CAS, China
• Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), Taiwan
• Australia Telescope National Facility (ATNF), Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
• International Centre for Radio Astronomy Research (ICRAR), Australia
• National Centre for Radio Astrophysics (NCRA), India
• Yamaguchi University, Japan
• Ibaraki University, Japan
• Kagoshima University, Japan
• Institut Teknologi Bandung (ITB), Indonesia
• Universiti Malaya (UM), Malaysia
• Vietnam National Space Center (VNSC), Vietnam
• Laboratoire d'Astrophysique de Marseille (LAM), France
• Aryabhatta Research Institute of Observational Sciences (ARIES), India
• Tata Institute of Fundamental Research (TIFR), India
• Physical Research Laboratory (PRL), India