TrES-5 b

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TrES-5 b

Post by Sirius_Alpha on 18th August 2011, 8:10 pm

TrES-5: A Massive Jupiter-sized Planet Transiting A Cool G-dwarf
http://arxiv.org/abs/1108.3572

We report the discovery of TrES-5, a massive hot Jupiter that transits the star GSC 03949-00967 every 1.48 days. From spectroscopy of the star we estimate a stellar effective temperature of$5171 +/- 36 K, and from high-precision B, R and I photometry of the transit we constrain the ratio of the semi-major axis and the stellar radius to be 6.07 +/- 0.14. We compare these values to model stellar isochrones to obtain a stellar mass of 0.893 +/- 0.024 solar masses. Based on this estimate and the photometric time series, we constrain the stellar radius to be 0.866 +/- 0.013 solar radii, and the planet radius to be 1.209 +/- 0.021 Jupiter radii. We model our radial-velocity data assuming a circular orbit and find a planetary mass of 1.778 +/- 0.063 Jupiter masses. Our radial-velocity observations rule out line-bisector variations that would indicate a specious detection resulting from a blend of an eclipsing binary system. TrES-5 orbits one of the faintest stars with transiting planets found to date from the ground and demonstrates that precise photometry and followup spectroscopy are possible, albeit challenging, even for such faint stars.

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Re: TrES-5 b

Post by Edasich on 19th August 2011, 2:46 am

So many years after last discovery. Very welcome Very Happy
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Re: TrES-5 b

Post by Lazarus on 19th August 2011, 5:50 am

The nomenclature of the TrES planets is a bit weird, it looks from the discovery papers that the designation TrES-# refers to the planet not the star. So in this case TrES-5 is the planet orbiting the star GSC 03949-00967.

Of course this hasn't prevented the usage in various other papers using TrES-# for the star and then appending a "b" for the planet. Fortunately we don't have any confirmed second planets in any of these systems or it might get really confusing...
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Re: TrES-5 b

Post by exoplanet on 20th August 2011, 10:05 am

Does this mean TrES is back online or is this just making the most from old data ? The paper seems to imply the later.


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Re: TrES-5 b

Post by Sirius_Alpha on 11th June 2018, 8:51 pm

Maybe a second planet from TTVs?

Transit timing analysis of the exoplanet TrES-5 b. Possible existence of the exoplanet TrES-5 c
https://arxiv.org/abs/1806.03503

In this work, we present transit timing variations detected for the exoplanet TrES-5b. To obtain the necessary amount of photometric data for this exoplanet, we have organized an international campaign to search for exoplanets based on the Transit Timing Variation method (TTV) and as a result of this we collected 30 new light curves, 15 light curves from the Exoplanet Transit Database (ETD) and 8 light curves from the literature for the timing analysis of the exoplanet TrES-5b. We have detected timing variations with a semi-amplitude of A ~ 0.0016 days and a period of P ~ 99 days. We carried out the N-body modeling based on the three-body problem. The detected perturbation of TrES-5b may be caused by a second exoplanet in the TrES-5 system. We have calculated the possible mass and resonance of the object: M ~ 0.24MJup at a 1:2 Resonance.

Really takes me back to the pre-Kepler era where there were a hand-full of transiting hot Jupiters which had possible ground-based TTV detections indicative of planets that never turned up. WASP-10, GJ 436, etc.

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