Understanding the stars in our search for another Earth

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• Annelies Mortier (Cambridge)
• Tuesday 14 June 2022, 13:00-14:00
• Ryle seminar room + ONLINE - Details to be sent by email.

If you have a question about this talk, please contact Dr Annelies Mortier.

To understand exoplanetary systems, we can study their mass-radius relationship or lack thereof. The HARPS -N Collaboration has been leading the efforts to fill and interpret the mass-radius diagram of small planets by combining space photometry, Gaia astrometry and radial velocities. Determining a precise as-well-as accurate planet mass can only be determined with well-sampled, stable, and precise observations combined with advanced computational efforts and new extraction and processing techniques. The biggest challenge remains the stellar activity processes, mimicking and hiding planetary signals. With the HARPS -N Collaboration, we have been studying the Sun-as-a-star for 6 years, providing a dataset where we truly have no planetary signals and can study stellar behaviour in more detail. In this talk, I will give an overview on the leading efforts of our collaboration to fill the mass-radius diagram, an insight in new LSD -based processing techniques, and the behaviour over time of the standard activity indicators using Solar data.

This talk is part of the Exoplanet Seminars series.

This talk is included in these lists:

• Combined External Astrophysics Talks DAMTP
• Cosmology, Astrophysics and General Relativity
• Exoplanet Seminars
• Institute of Astronomy Talk Lists
• LCLU Departmental Talks
• Ryle seminar room + ONLINE - Details to be sent by email

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