TrES-5 b

View previous topic View next topic Go down

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.

_________________
Caps Lock: Cruise control for 'Cool'!
avatar
Sirius_Alpha
Admin
Admin

Number of posts : 3414
Location : Earth
Registration date : 2008-04-06

View user profile http://solar-flux.forumandco.com/

Back to top Go down

Re: TrES-5 b

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

So many years after last discovery. Very welcome Very Happy
avatar
Edasich
dM star
dM star

Number of posts : 1502
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

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...
avatar
Lazarus
dG star
dG star

Number of posts : 2782
Registration date : 2008-06-12

View user profile

Back to top Go down

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.


exoplanet
Planetesimal
Planetesimal

Number of posts : 124
Location : here
Registration date : 2008-06-16

View user profile

Back to top Go down

Re: TrES-5 b

Post by Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum