The population of debris discs orbiting subgiants

Amy Bonsor, Grant M. Kennedy, Justin R. Crepp, John A. Johnson, Mark C. Wyatt, Bruce Sibthorpe, Kate Y.L. Su

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Whilst debris discs orbiting main-sequence stars are well studied, very little is known regarding their fate when the star evolves onto the giant branch. For intermediate mass (A-type) stars, giants provide a unique opportunity to detect planets using the radial velocity technique, otherwise prohibited by high jitter levels and rotationally broadened lines in main-sequence intermediate mass (A-type) stars. Such stars can provide key insights into the structure of planetary systems around intermediate mass stars. In our Herschel OT1 program (PI Bonsor) we searched for the presence of debris discs orbiting a sample of 36 subgiants, half of which have RV detected companions. Our best detection is the resolved debris disc orbiting κ CrB.

Original languageEnglish (US)
Title of host publicationExploring the Formation and Evolution of Planetary Systems
PublisherCambridge University Press
Number of pages2
ISBN (Print)9781107045200
StatePublished - Jun 2013

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221


  • (Stars:) planetary systems
  • (stars:) circumstellar matter

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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