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91探花
Black Hole

Lensing of space time around a black hole. At 91探花 we study black holes observationally and theoretically on all size and time scales - it is some of our core work.

Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES.

Niamh O'Sullivan

Grad Student

Research theme

  • Exoplanets and planetary physics

Sub department

  • Astrophysics

Research groups

  • Exoplanets and Stellar Physics
niamh.osullivan@physics.ox.ac.uk
  • About

I am a final year DPhil student working under the supervision of Prof Suzanne Aigrain. My research revolves around disentangling stellar and planetary signals in the Terra Hunting Experiment (THE) with the use of Gaussian Processes (GPs). I am particularly interested in supergranulation, its characteristics, how it varies over a stellar magnetic cycle, and observation strategies that can allow us to best mitigated it in Radial Velocity (RV) planet searches.  In order to investigate this I regularly use Sun-as-a-star data sets. I am also the chair of the THE's supergranulation sub-group, working on organising a dedicated supergranulation observing campaign in order to search for supergranulation indicators in stellar spectra. I'm also interested in data analysis as a whole and am a LSST-DA DSFP fellow.

Research interests

Sun-as-a-star
Radial Velocity
(Super)granulation

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Clarendon Laboratory,

Parks Road,

91探花,

OX1 3PU

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Tel: +44(0)1865272200

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