Re: CoRoT Results

lodp · by lodp on Sat Sep 05, 2009 9:08 am

It was this bit that caught my eye first!

Dr Mayor told the meeting that the French mission, CoRoT, has now found 80 exoplanets.

Sirius_Alpha · by Sirius_Alpha on Sat Sep 05, 2009 9:18 am

I wonder if those are 80 exoplanets, or exoplanet candidates. Not to say that Dr. Mayor doesn't know what he's talking about, but rather, than a journalist may not know the difference well enough to include that c-word.

This bit, too, is astounding (if true).

The planets discovered so far by CoRoT typically have a mass that is less than 30 times that of Earth, making them likely to have a solid, rocky surface. But they also orbit their stars rapidly, typically taking two or three months, rather than a year, to do so.(gaseous).

Lazarus · by Lazarus on Sat Sep 05, 2009 7:50 pm

Sirius_Alpha wrote:Nice catch, lodp!

Dr Mayor described a system he has seen that has five rocky planets in it. They have masses of 11, 14, 26, 27 and 76 times that of the Earth. He concluded his talk by saying, “I am really confident that we have an Earth-like planet coming in the next two years.”

Though only one of those, to me, seems rocky (let's hope that the author just forgot to put some periods between each number's digits) this is pretty nice. Five planet system of all sub-Jovians?? No wonder the HARPS results are taking ages. But that's Off Topic.

The question is how many of the 5 have been spotted in transit, and are thus able to have structure determinations, as opposed to being spotted by RV followup.

Lazarus · by Lazarus on Fri Sep 11, 2009 3:33 am

COROT-5 coordinates are on Extrasolar Planets Encyclopaedia.

SIMBAD search for these coordinates suggests the host star is DENIS-P J064506.5+004855=2MASS J06450653+0048548=USNO-B1.0 0908-00103649

Edasich · by Edasich on Fri Sep 11, 2009 5:20 am

There is just Corot-6 left to be released now.
Also brand-new planetary candidates, of course.

Curiously I've found this article on WikiPedia where Corot-6 coordinates are given!

http://en.wikipedia.org/wiki/COROT-6

The host star would be located in Aquila alike Corot-3.

Sirius_Alpha · by Sirius_Alpha on Fri Sep 11, 2009 9:12 am

Those coordinates for CoRoT-6 are pretty vague, and I'm assuming they just correspond to the LRc02 field of view.
Edit: The coordinates given for CoRoT-6 at the Wikipedia page are from this pdf.

Good to see that CoRoT-5's coordinates are released though!

lodp · by lodp on Wed Sep 16, 2009 4:08 am

CoRot-7c alas not transiting though:

http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/forth/aa13096-09.pdf

Edasich · by Edasich on Wed Sep 16, 2009 6:23 am

Gwaah!!

But I remember there could be yet another one.

Seriously, here we see interesting new informations: Corot-7 b's mass is significantly lower than previous inferred value of 22 Me.
Now it is roughly a 5 Earth mass planet with density of 5.6 g/cc, quite similar to that of out homeworld.

And now here we have radial velocity sets too.

On EPE too:

http://exoplanet.eu/star.php?st=CoRoT-7

Lazarus · by Lazarus on Wed Sep 16, 2009 2:21 pm

So that makes for a total of 3 known multiplanet systems with at least one transiting planet... hopefully more to come!

Stardust · by Stardust on Wed Sep 16, 2009 3:47 pm

Is there any observation of this system by Spitzer scheduled in that space telescope "warm season"?

Sirius_Alpha · by Sirius_Alpha on Wed Sep 16, 2009 7:54 pm

Lazarus wrote:So that makes for a total of 3 known multiplanet systems with at least one transiting planet... hopefully more to come!

~~HAT-P-12~~ HAT-P-13, CoRoT-7, and what else?

lodp · by lodp on Wed Sep 16, 2009 8:23 pm

Sirius_Alpha should that have said Hat-P-13, CoRoT-7, and what else?

Sirius_Alpha · by Sirius_Alpha on Wed Sep 16, 2009 8:33 pm

lodp wrote:Sirius_Alpha should that have said Hat-P-13, CoRoT-7, and what else?

D'OH! Thanks, corrected Very Happy

Lazarus · by Lazarus on Thu Sep 17, 2009 1:17 pm

Sirius_Alpha wrote:
Lazarus wrote:So that makes for a total of 3 known multiplanet systems with at least one transiting planet... hopefully more to come!

~~HAT-P-12~~ HAT-P-13, CoRoT-7, and what else?

Bear in mind that the first known transiting planets were not hot Jupiters.

I believe these two planets were known to transit long before the discovery of the transits of HD 209458b. They are also definitely located in a multi-planet system.

TheoA · by TheoA on Thu Sep 17, 2009 1:47 pm

http://www.eso.org/public/outreach/press-rel/pr-2009/pr-33-09.html

More info on COROT 7B.

Surface temperature is 2000 degrees day side and -200 night side.

No atmosphere at all which seems surprising.

So close in it seems a comfortable atmosphere like ours may be unlikely.

"..boiling oceans on the surface.."

RV data by WASP