Tianqi CANG
Stellar magnetism · Stellar activity · Exoplanet environments
Assistant Researcher
Beijing Planetarium
Beijing, China
I study how stellar magnetic fields shape magnetic activity, atmospheric eruptions, and the environments of nearby planets.
My work combines time-domain photometry with high-resolution spectropolarimetry to connect magnetic structures on stellar surfaces with flares, radio bursts, and the energy stored in stellar upper atmospheres.
Research
Questions I work on
Magnetic surfaces
Mapping stellar magnetic topologies, starspots, and prominences across rotation and activity cycles.
Upper atmospheres
Measuring chromospheric magnetic fields and tracing how magnetic energy is stored and released.
Stellar space weather
Connecting flares and coherent radio bursts to the environments and habitability of exoplanets.
Featured result
Magnetic fields above stellar surfaces
Nature Communications · 2026
Measuring the magnetic fields in the chromospheres of low-mass stars
Using a decade of spectropolarimetric observations, we measured magnetic fields at multiple atmospheric heights in three active M dwarfs, revealing strong and complex chromospheric fields that constrain stellar eruptions and exoplanet space weather.
Open tools
Research software
pyZeeTom
Forward modelling and maximum-entropy inversion of full-Stokes polarization spectra.
GitHub repository →SpectraViewer
An interactive viewer for exploring polarization spectra from PolarBase.
GitHub repository →Updates
Recent news
Our first measurements of magnetic fields in the chromospheres of low-mass stars were published in Nature Communications.
FAST observations revealed ultrafast drifting radio bursts associated with starspot magnetic fields on AD Leo in Science Advances.
Collaboration
Let’s talk about stellar magnetic activity.
I welcome collaborations around spectropolarimetric observations, stellar magnetic-field measurements, time-domain photometry, and scientific software.
astrocang@gmail.com →