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 language | English |
|---|---|
| Journal | Astronomy and Astrophysics |
| Volume | 500 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 2009 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Detection of orbital parameter changes in the TrES-2 exoplanet?
AU - Mislis, Dimitrios
AU - Schmitt, J. H M M
PY - 2009/6
Y1 - 2009/6
N2 - 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.
AB - 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.
KW - Stars: planetary systems
KW - Techniques: photometric
UR - http://www.scopus.com/inward/record.url?scp=67650594971&partnerID=8YFLogxK
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U2 - 10.1051/0004-6361/200811424
DO - 10.1051/0004-6361/200811424
M3 - Article
VL - 500
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 0004-6361
IS - 3
ER -