Detection of Period Variations in OGLE-TR-111b

Detection of Period Variations in OGLE-TR-111b

From the Extrasolar Planets Encyclopaedia

Quote :

DIAZ R., ROJO P., MELITA M., HOYER S., MINNITI D., MAUAS P. & RUIZ M.-T. , 2008 (update : 09 May 2008)

Detection of Period Variations in Extrasolar Planetary Companion OGLE-TR-111b

ApJ. Letters , - , -

submitted

So, perhaps OGLE-TR-111 c? Another planet might be capable of producing the variations. I have no access to the paper, so I can't say one way or the other.

Ah, finally the paper. They propose an Earth-mass planet could be altering the orbit, and that radial velocity measurements do not rule out such a possibility. I would be curious though about what kind of precision we could expect for such a star as OGLE-TR-111.

Detection of period variations in extrasolar transiting planet OGLE-TR-111b
http://fr.arxiv.org/abs/0806.1229

Abstract wrote:

Two consecutive transits of planetary companion OGLE-TR-111b were observed in the I band. Combining these observations with data from the literature, we find that the timing of the transits cannot be explained by a constant period, and that the observed variations cannot be originated by the presence of a satellite. However, a perturbing planet with the mass of the Earth in an exterior orbit could explain the observations if the orbit of OGLE-TR-111b is eccentric. We also show that the eccentricity needed to explain the observations is not ruled out by the radial velocity data found in the literature.

Interesting. I wonder if such an Eart-sized object lies in outer orbit either in trojan configuration with planet "b".

Once the claimed a possible outer planet at 0.11 AUs. But then no more updates....

A re-edited version is back up.

Where?

Same link as in second post of this thread - the latest version is now v3.

OH I see...

There is a paper from 2005 about a possible second planet in that system -- http://arxiv.org/abs/astro-ph/0501440

jyril wrote:

There is a paper from 2005 about a possible second planet in that system -- http://arxiv.org/abs/astro-ph/0501440

Welcome, Jyril. Thanks for the link!