Ultracool M Dwarfs

I use radio telescopes such as ALMA and the VLA to measure the radio flux density of ultracool dwarfs (spectral type >M6), characterise the emission mechanism, and evaluate any impact on surrounding planets.  

HST image of CHXR 73

HST image of CHXR 73

Ultracool Dwarfs

Ultracool dwarfs are small stars with effective temperatures < 2700 K.  Like all M dwarfs, ultracool dwarfs tend to be magnetically active.  Ultracool dwarfs may have different emission mechanisms.

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Radio Emission & HAbitability

Magnetic fields and gyrosynchrotron radiation from an ultracool dwarf can threaten life on surrounding planets.

https://dribbble.com/ignis

https://dribbble.com/ignis

TRAPPIST-1 System

TRAPPIST-1 is an ultracool M dwarf (M8) with a system of seven planets, four of which may reside in the habitable zone.  TRAPPIST-1 itself may be too magnetically active to support life on its planets.