Activity-induced radial velocity variation of M dwarf stars
Research output: Contribution to journal › Conference article › Research › peer-review
Stellar magnetic activity manifests itself in a variety of ways including starspots-cool, dark regions on the stellar surface. Starspots can cause variations ('jitter') in spectral line-profiles which can mimic the radial velocity (RV) variations caused by an orbiting planet, or create RV noise that can drown out a planetary signature. Cool, low-mass M dwarf stars can be highly active, which can make detection of potentially habitable planets around these stars difficult. We investigate radial velocity variations caused by different activity (spot) patterns on M dwarf stars in order to determine the limits of detectability for small planets orbiting active M dwarfs. We report on our progress toward the aim of answering the following questions: What types of spot patterns are realistic for M dwarf stars? What effect will spots have on M dwarf RV measurements? Can jitter from M dwarf spots mimic planetary signals? What is the ideal observing wavelength to reduce M dwarf jitter?
Original language | English |
---|---|
Journal | Proceedings of the International Astronomical Union |
Volume | 8 |
Issue number | S293 |
Pages (from-to) | 197-200 |
Number of pages | 4 |
ISSN | 1743-9213 |
DOIs | |
Publication status | Published - Aug 2012 |
Event | 293th Symposium of the International Astronomical Union: formation, detection, and characterization of extrasolar habitable planets - Beijing, China Duration: 27 Aug 2012 → 31 Aug 2012 Conference number: 293 |
Conference
Conference | 293th Symposium of the International Astronomical Union |
---|---|
Number | 293 |
Country | China |
City | Beijing |
Period | 27/08/2012 → 31/08/2012 |
- atmospheres, low-mass, planetary systems, rotation, spots, stars: activity, techniques: radial velocities
Research areas
ID: 183471442