Starspots and spin-orbit alignment in the WASP-4 exoplanetary system

Details Starspots and spin-orbit alignment in the WASP-4 exoplanetary system Starspots and spin-orbit alignment in the WASP-4 exoplanetary system

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..276..511s&link_type=abstract

The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution, Proceedings of the International Astronomi

Astronomy and Astrophysics

Astrophysics

Stars: Spots, Planetary Systems, Techniques: Photometric

Scientific paper

We present the photometric analysis of 4 transits of the exoplanet WASP-4b, obtained with the Baade 6.5m telescope, one of the two Magellan telescopes at Las Campanas. The light curves have a photometric precision of 0.5 mmag and a time sampling of 30s. This high precision has allowed us to detect several ``spot anomalies'': temporary brightenings due to the occultation of a starspot on the transit chord. By analyzing these anomalies we find the sky-projected stellar obliquity to be λ = 1°+12°-14°. The small value suggests that the planet migration mechanism preserved the initially low obliquity, or that tidal evolution has realigned the system.

Affiliated with

Also associated with

No associations

Rating

Starspots and spin-orbit alignment in the WASP-4 exoplanetary system 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 Starspots and spin-orbit alignment in the WASP-4 exoplanetary system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Starspots and spin-orbit alignment in the WASP-4 exoplanetary system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-742033