Re: More planets in 55 Cancri?

Edasich · by Edasich on Mon Apr 27, 2009 10:24 am

Dnoces wrote:What's this systemic thing that I keep hearing about?

Systemic Console is a JAVA program to search extrasolar planets with available radial velocity data.
Take a look here:

http://207.111.201.70/php/viewdatabase.php?choice=real

And scrolling down you'll find a link "downloadable console". It's almost easy to use and can be executed without installation.

Dnoces · by Dnoces on Wed Apr 29, 2009 5:19 pm

Thanks, I'm downloading it know.
Sure looks cool

Edasich · by Edasich on Wed Apr 29, 2009 5:40 pm

And if you have also radial velocity sets for "non-exoplanet-host" stars you can try searching for yet "unseen" planets =P

AVBursch · by AVBursch on Sat May 02, 2009 3:13 pm

Additional planets can't be ruled out. However, constraints can be set in terms of the masses of additional planets in the system.

For the region between 55 Cancri f and 55 Cancri d, no planet can be larger than about 7 Mearth, or the planet would have been discovered by now. There is already a sufficient amount of radial velocity data to make it possible to find a super-Earth in the region if it exists.

For the region exterior to 55 Cancri d, the area of stability starts at around 10 au. Any planet larger than 40 Mearth in the region out to 15 au from the star would have revealed its presence through a long-term radial velocity trend. So far, there is no radial velocity drift to indicate the presence of additional planets in the 55 Cancri system.