Secondary radio eclipse of the transiting planet HD 189733 b: an upper limit at 307-347 MHz

A. M. S. Smith, A. Collier Cameron, J. Greaves, M. Jardine, G. Langston, D. Backer

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


We report the first attempt to observe the secondary eclipse of a transiting extra-solar planet at radio wavelengths. We observed HD 189733 b with the Robert C. Byrd Green Bank Telescope of the National Radio Astronomy Observatory (NRAO) over about 5.5 h before, during and after secondary eclipse, at frequencies of 307-347 MHz. In this frequency range, we determine the 3s upper limit to the flux density to be 81 mJy. The data are consistent with no eclipse or a marginal reduction in flux at the time of secondary eclipse in all subsets of our bandwidth; the strongest signal is an apparent eclipse at the 2 sigma level in the 335.2-339.3 MHz region. Our observed upper limit is close to theoretical predictions of the flux density of cyclotron-maser radiation from the planet.

Original languageEnglish
Pages (from-to)335-341
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Publication statusPublished - 1 May 2009


  • masers
  • stars: magnetic fields
  • planetary systems
  • radio continuum: stars
  • HD-189733
  • STAR


Dive into the research topics of 'Secondary radio eclipse of the transiting planet HD 189733 b: an upper limit at 307-347 MHz'. Together they form a unique fingerprint.

Cite this