Detection of orbital parameter changes in the TrES-2 exoplanet?

Dimitrios Mislis, J. H M M Schmitt

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report a possible change in the orbit parameters of the TrES-2 exoplanet. With a period of 2.470621 days, the TrES-2 exoplanet exhibits almost "grazing" transits 110.4 min duration as measured in 2006 by Holman and collaborators. We observed two transits of TrES-2 in 2008 using the 1.2 m Oskar-Lühning telescope (OLT) of Hamburg observatory employing CCD photometry in an i-band and a near to R-band filter. A careful lightcurve analysis including a re-analysis of the 2006 observations shows that the current transit duration has shortened since 2006 by ≈3.16 min. Although the new observations were taken in a different filter we argue that the observed change in transit duration time cannot be attributed to the treatment of limb darkening. If we assume the stellar and planetary radii to be constant, a change in orbit inclination is the most likely cause of this change in transit duration.

Original languageEnglish
JournalAstronomy and Astrophysics
Volume500
Issue number3
DOIs
Publication statusPublished - Jun 2009
Externally publishedYes

Fingerprint

extrasolar planets
transit
filter
orbitals
limb
observatory
grazing
orbits
limb darkening
filters
inclination
photometry
charge coupled devices
observatories
detection
parameter
analysis
telescopes
radii
causes

Keywords

  • Stars: planetary systems
  • Techniques: photometric

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Detection of orbital parameter changes in the TrES-2 exoplanet? / Mislis, Dimitrios; Schmitt, J. H M M.

In: Astronomy and Astrophysics, Vol. 500, No. 3, 06.2009.

Research output: Contribution to journalArticle

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