Tianqi CANG

Room 504, Building B

No.138 Xizhimenwai Street

Beijing, PRC

Welcome to my site!

I am an astronomer working in stellar astrophysics, with a particular interest in stellar magnetism and magnetic activity. My research combines photometric data from TESS and Kepler with spectropolarimetric observations from ESPaDOnS, Narval, and HARPSpol to investigate how magnetic fields shape stellar evolution, drive variability, and influence the environments and potential habitability of planetary systems.

More recently, I have been studying magnetic fields in stellar upper atmospheres, focusing on the storage and release of magnetic energy during episodes of extreme stellar activity, such as flares, and their implications for exoplanet atmospheres and long-term habitability.

This site brings together my research, projects, and academic activities. If you are interested in collaboration or related discussions, feel free to email me.

news

Jan 16, 2026	We achieved the first measurement of chromospheric magnetic fields in stars beyond the Sun, using high-resolution polarization spectroscopy data collected over a decade. This breakthrough reveals the complex magnetic field structure in stellar upper atmospheres and provides crucial observational evidence for understanding stellar eruptive activities and their impact on exoplanetary environments. The research was published in the international journal Nature Communications. Article link: https://www.nature.com/articles/s41467-025-66624-9. Related news (in Chinese): Guangming Daily, Beijing Normal University, The Paper.
Oct 18, 2025	Using radio observations of FAST, we detected a new millisecond-scale radio burst on the M-type star AD Leo! The signal originates from small-scale magnetic fields in the stellar spotted regions. The relevant work was recently published in Science Advances. A related news can be see here (in Chinese).

Jan 16, 2026

We achieved the first measurement of chromospheric magnetic fields in stars beyond the Sun, using high-resolution polarization spectroscopy data collected over a decade. This breakthrough reveals the complex magnetic field structure in stellar upper atmospheres and provides crucial observational evidence for understanding stellar eruptive activities and their impact on exoplanetary environments. The research was published in the international journal Nature Communications. Article link: https://www.nature.com/articles/s41467-025-66624-9. Related news (in Chinese): Guangming Daily, Beijing Normal University, The Paper.

Oct 18, 2025

Using radio observations of FAST, we detected a new millisecond-scale radio burst on the M-type star AD Leo! The signal originates from small-scale magnetic fields in the stellar spotted regions. The relevant work was recently published in Science Advances. A related news can be see here (in Chinese).

latest posts

Oct 27, 2025	a mini tool for viewing spectra from Polarbase
Oct 22, 2025	a table of observational chromospheric emission lines

selected publications

Nat. Commun.

Measuring the magnetic fields in the chromospheres of low-mass stars

Tianqi Cang, Pascal Petit, Jean-François Donati, and 11 more authors

Nature Communications, Nov 2026

DOI Bib

@article{2026NatCo..17...64C,
  dimensions = {true},
  author = {{Cang}, Tianqi and {Petit}, Pascal and {Donati}, Jean-Fran{\c{c}}ois and {Tian}, Hui and {Fu}, Jianning and {Li}, Hao and {Bellotti}, Stefano and {Hu}, Xueying and {Ma}, Xiaoyu and {Lopez Ariste}, Arturo and {Xing}, Keyu and {Morin}, Julien and {Lu}, Hongpeng and {Zong}, Weikai},
  title = {{Measuring the magnetic fields in the chromospheres of low-mass stars}},
  journal = {Nature Communications},
  keywords = {Solar and Stellar Astrophysics},
  year = {2026},
  month = nov,
  volume = {17},
  eid = {64},
  pages = {64},
  doi = {10.1038/s41467-025-66624-9},
  archiveprefix = {arXiv},
  eprint = {2511.08891},
  primaryclass = {astro-ph.SR},
  adsurl = {https://ui.adsabs.harvard.edu/abs/2026NatCo..17...64C},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

ApJ

Inactive Longitude and Superflare in the Active Single-lined Pre-main-sequence Binary V2279 Cyg

Xueying Hu, Tianqi Cang, Jian-Ning Fu, and 7 more authors

ApJ, Sep 2025

DOI Bib

@article{2025ApJ...990...27H,
  dimensions = {true},
  author = {{Hu}, Xueying and {Cang}, Tianqi and {Fu}, Jian-Ning and {Wang}, Xuan and {Xing}, Keyu and {Wang}, Haotian and {Petit}, Pascal and {Wang}, Jiaxin and {Yang}, Yong and {Zhao}, He},
  title = {{Inactive Longitude and Superflare in the Active Single-lined Pre-main-sequence Binary V2279 Cyg}},
  journal = {ApJ},
  keywords = {Flare stars, Binary stars, Pre-main sequence stars, Magnetic fields, Stellar activity, 540, 154, 1290, 994, 1580, Solar and Stellar Astrophysics},
  year = {2025},
  month = sep,
  volume = {990},
  number = {1},
  eid = {27},
  pages = {27},
  doi = {10.3847/1538-4357/adeb69},
  archiveprefix = {arXiv},
  eprint = {2507.11066},
  primaryclass = {astro-ph.SR},
  url = {https://ui.adsabs.harvard.edu/abs/2025ApJ...990...27H},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

JOAA

Seismic test of the mass-radius relationship of hydrogen-atmospheric white dwarf stars

Tianqi Cang, Jiayi Zhang, Jian-Ning Fu, and 2 more authors

JOAA, Aug 2025

DOI Bib

@article{2025JApA...46...81C,
  dimensions = {true},
  author = {{Cang}, Tianqi and {Zhang}, Jiayi and {Fu}, Jian-Ning and {Zhao}, He and {Zong}, Weikai},
  title = {{Seismic test of the mass-radius relationship of hydrogen-atmospheric white dwarf stars}},
  journal = {JOAA},
  keywords = {Solar and Stellar Astrophysics},
  year = {2025},
  month = aug,
  eid = {arXiv:2508.03184},
  pages = {arXiv:2508.03184},
  doi = {10.1007/s12036-025-10106-3},
  archiveprefix = {arXiv},
  eprint = {2508.03184},
  primaryclass = {astro-ph.SR},
  url = {https://ui.adsabs.harvard.edu/abs/2025JApA...46...81C},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

A&A

Magnetic field and prominences of the young, solar-like, ultra-rapid rotator V530 Persei

Tianqi Cang, P. Petit, J. -F. Donati, and 7 more authors

A&A, Nov 2020

DOI Bib

@article{2020A&A...643A..39C,
  dimensions = {true},
  author = {{Cang}, Tianqi and {Petit}, P. and {Donati}, J. -F. and {Folsom}, C.~P. and {Jardine}, M. and {Villarreal D'Angelo}, C. and {Vidotto}, A.~A. and {Marsden}, S.~C. and {Gallet}, F. and {Zaire}, B.},
  title = {{Magnetic field and prominences of the young, solar-like, ultra-rapid rotator V530 Persei}},
  journal = {A&A},
  keywords = {stars: individual: V530 Per, stars: magnetic field, stars: solar-type, stars: rotation, starspots, Astrophysics - Solar and Stellar Astrophysics},
  year = {2020},
  month = nov,
  volume = {643},
  eid = {A39},
  pages = {A39},
  doi = {10.1051/0004-6361/202037693},
  archiveprefix = {arXiv},
  eprint = {2008.12120},
  primaryclass = {astro-ph.SR},
  url = {https://ui.adsabs.harvard.edu/abs/2020A&A...643A..39C},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

A&A

Short-term variations of surface magnetism and prominences of the young Sun-like star V530 Per

Tianqi Cang, P. Petit, J. -F. Donati, and 1 more author

A&A, Oct 2021

DOI Bib

@article{2021A&A...654A..42C,
  dimensions = {true},
  author = {{Cang}, Tianqi and {Petit}, P. and {Donati}, J. -F. and {Folsom}, C.~P.},
  title = {{Short-term variations of surface magnetism and prominences of the young Sun-like star V530 Per}},
  journal = {A&A},
  keywords = {stars: magnetic field, stars: solar-type, stars: rotation, starspots, stars: individual: V530 Per, Astrophysics - Solar and Stellar Astrophysics},
  year = {2021},
  month = oct,
  volume = {654},
  eid = {A42},
  pages = {A42},
  doi = {10.1051/0004-6361/202141975},
  archiveprefix = {arXiv},
  eprint = {2109.08690},
  primaryclass = {astro-ph.SR},
  url = {https://ui.adsabs.harvard.edu/abs/2021A&A...654A..42C},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}