Dr. Gregg Hallinan

Professor

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Biography

Gregg W. Hallinan is a Professor of Astronomy at the California Institute of Technology and the Director of the Owens Valley Radio Observatory. He earned his B.Sc. from the National University of Ireland in 2002 and completed his Ph.D. in 2008. Hallinan's research is centered around magnetic activity in stellar and planetary systems, particularly focusing on the role that magnetic fields play in the formation and evolution of stars and planets. His work examines the high-energy emissions from stars and employs techniques like Long Baseline Interferometry to image coronae of 'flare stars,' which are young stars that emit massive flares. He conducts some of the most in-depth radio searches for exoplanets, utilizing state-of-the-art radio telescopes to investigate planetary magnetic fields. Hallinan is also engaged in efforts to systematically search for variable radio emissions from stars, brown dwarfs, and planets, analyzing data to uncover new classes of transient radio sources.

Research Interests

Experience

Professor

2018-01-01 — Present

California Institute of Technology • Pasadena, CA

Leading research in Astronomy, focusing on magnetic activities and radio emissions.

Director

2019-01-01 — Present

Owens Valley Radio Observatory • Pasadena, CA

Directing research initiatives and operational activities at the observatory.

Requirements for California Institute of Technology

Doctorate Program
Requirements
TOEFL
Total
Required:100
IELTS
Overall
Required:7
Prerequisites
Bachelor's degree or equivalent Strong background in mathematics and physical sciences
Application Checklist
  • Online Application
  • Statement of Purpose
  • Three Letters of Recommendation
  • Transcripts
  • Resume/CV
Specialization Notes

Most Caltech graduate programs are PhD-only. GRE General and Subject tests vary by department; many have made them optional or no longer accept them.