Improving Earth-like planets' detection with an ELT: the differential radial velocity experiment

Details Improving Earth-like planets' detection with an ELT: the differential radial velocity experiment Improving Earth-like planets' detection with an ELT: the differential radial velocity experiment

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...469..355r&link_type=abstract

Astronomy and Astrophysics, Volume 469, Issue 1, July I 2007, pp.355-361

Biology

Stars: Planetary Systems, Techniques: Spectroscopic, Techniques: Radial Velocities, Astrobiology

Scientific paper

Context: Direct detection of Earth-like planets around a nearby star is extremely difficult for ground-based telescopes equipped with the eXtreme Adaptative Optics system. Aims: We propose to combine high-precision radial velocity with an ELT to detect extrasolar planets with a feasible coronagraph. Methods: In this context, we investigated the detectability of Earth-like extrasolar planets with an ELT of 42 m equipped with the spectro-coronagraphic instrument in an eXtrem Adaptive Optics system. Those stellar residuals left uncorrected by the XAO wavefront correction (Strehl ratio >85%) system need to be calibrated. We propose calibrating them by the radial velocity measurement of the planet in a multiple spectrum correlation process. Results: This method allows detection of Terrestrial planets with an ELT but requires a long exposure time (≈ 200 h) Conclusions: The technique overcomes the main coronagraphic limitation due to the pinned and the low variable speckles and opens a way to detect directly exoplanets with large ground-based telescopes equipped with an efficient XAO system.

Affiliated with

Also associated with

No associations

Rating

Improving Earth-like planets' detection with an ELT: the differential radial velocity experiment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Improving Earth-like planets' detection with an ELT: the differential radial velocity experiment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improving Earth-like planets' detection with an ELT: the differential radial velocity experiment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1027974