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Astrophysical Noise Sources

The broad objectives of this Work Package are to:

1) Understand the effects that astrophysical noise such as star spots, granulation, suppression of convective blueshift, and other manifestations of stellar activity has on the radial velocity follow-up of planet candidates discovered by PLATO - especially for low mass (terrestrial) planets.

2) Develop and outline mitigation procedures, thereby enhancing the efficiency of the PLATO ground-based follow-up mission and broadening its span.

Recent Activities

The first "Know thy star, know thy planet" ISSI workshop (Team Lead: Chris Watson) was held in Bern from December 10th to 14th, 2018. A review of the state-of the-art astrophysical noise mitigation methods is underway. The web-page for these activities can be found via:

Work Package members (being updated)

  • Dr Chris Watson (WP Manager); Queen's University Belfast, UK
  • Dr Heather Cegla; Observatoire de Geneve, Switzerland
  • Prof. Andrew Collier Cameron; University of St. Andrews, UK
  • Mr. Joäo Comacho; Universidade do Porto, Portugal
  • Mr Jean Costes; Queen's University Belfast, UK
  • Dr Xavier Dumusque; Observatoire de Geneve, Switzerland
  • Dr João Faria; Universidade do Porto, Portugal
  • Dr Pedro Figueira; Universidade do Porto, Portugal
  • Dr Raphaëlle Haywood, Harvard, US
  • Dr Monica Lendl; Space Research Institute Austrian Academy of Sciences, Austria
  • Dr Luca Malavolta; University of Padua, Italy
  • Dr Annelies Mortier; St Andrews University, UK
  • Dr Mahmoudreza Oshagh; Georg-August-University of Göttingen, Germany
  • Dr Katja Poppenhaeger; AIP Potsdam, Germany
  • Dr Andrew Thompson; Queen's University Belfast, UK

Publications relevant to WP 115-100. WP members highlighted:

1) Booth, Poppenhaegar, Watson et al., 2017, MNRAS, accepted. "An Improved Age-Activity Relationship for Cool Stars older than a Gigayear".

2) Thompson, Watson, et al., 2017, MNRAS Letter, 468L, 16. "The changing face of α Centauri B: probing plage and stellar activity in K-dwarfs".

3) Oshagh et al. (also includes Cegla, Dumusque, Faria, Figueria, Watson), 2017, A&A, in press. "Understanding stellar activity-induced radial velocity jitter using simultaneous K2 photometry and HARPS RV measurements".