The California Planet Survey I. Four New Giant Exoplanets

I was just awestuck!

Here the papers:

1) - HD179079b and HD73435b: Two Exoplanets Discovered at Keck Observatory1

2) - Five New Giant Exoplanets from the California Planet Survey

Several Hot Neptunes and HD 34445 is back! Been confirmed.

Oohhh thank-you so much.
Where are the Hot Neptunes though?

HD 179079 b is 25 Jupiters........ really?

Quote :

We note with interest that Gl 179 is an almost identical twin to Gl 876, an M dwarf known to host two Jovian planets locked in resonant orbits and a super Earth in a P=1.9d orbit.

Sirius_Alpha wrote:

Oohhh thank-you so much.
Where are the Hot Neptunes though?

HD 179079 b is 25 Jupiters........ really?

25.7 Earth masses. Just a typo of the author. It talks about a hot Neptune

Plus there's a third star in the key words (HD 143174). Not mentioned in the article. A hidden exoplanet host? Who knows...

Edasich wrote:

25.7 Earth masses. Just a typo of the author. It talks about a hot Neptune

Yeah I could have figured that one out if I read anything in that paper

Just to be safe...
How did you get to these papers? Is there an accessible link to them on the Exoplanets.org web page?
Edit: Found it, we're all good.

Parameters for the planet around HD 34445 seem to be rather different to the ones of the unconfirmed planet currently listed at EPE. I wouldn't necessarily call this one a "confirmation"...

Also it seems there is a typo in the title of the paper: should be HD 73534 not HD 73435.

Re HD 34445

Quote :

The relatively large residuals
to the one-planet fit (rms = 6ms−1) hint at a second,
unresolved planet in the system.

Wonder what the allowable range of parameters is for a second planet in this system is? The text gives a period of 14.3 days whilst the EPE unconfirmed was 126 days.

It's likely that the unconfirmed planet for HD 34445 is not the same as this new planet.

Looks like HD 13931 is one of the rare potential solar system analogues: the known planet is a low eccentricity giant planet out beyond 5 AU. Admittedly the planet is rather more massive than Jupiter.

Dudes, this is gonna be a hot summer for exoplanets. Just take a look:

3) - Five planets and an independent confirmation of HD 196885Ab from Lick Observatory

Plus independent confirmation of HD 196885 Ab and HD 89307 b.

4) - HAT-P-7: A Retrograde or Polar Orbit, and a Second Planet

Hints of possible 2nd planet around HAT-P-7.

5) - Planetary companions around the K giant stars 11 UMi and HD 32518

Planet Spam.

This is all pretty darned interesting, especially the bit about HAT-P-7.

Sirius_Alpha wrote:

Planet Spam.

Quote :

This is all pretty darned interesting, especially the bit about HAT-P-7.

Only no informations about putative orbital parameters, isn't it?

Indeed, though it perhaps ties in intimately to the discussion about retrograde planets and how they form (i.e. Kozai mechanism?)

Edit: 2nd planet at HD 196885A is discussed, but not enough of the orbit has been monitored to determine much about it. Looks like a multi-decade orbit.

2nd planet??

Whoa never mind, the 2nd curve is a result of the red dwarf companion.

Well just after we had the discussion that the extrasolar planets with tilted orbits were all eccentric super-Jupiters, here's a planet with a circular orbit and misalignment. Yay for HAT-P-7. Btw the Rossiter McLaughlin effect is also measured by a different group here, so we've got two papers discussing this that appeared on arXiv on the same day!

Back to the drawing board...

(Incidentally do we have a HATNet thread? Didn't spot one in my brief search of these parts)

Lazarus wrote:

(Incidentally do we have a HATNet thread? Didn't spot one in my brief search of these parts)

No. I'll go collect the relevant threads together.

In the last four days, the total planet catch for 2009 doubled. Hope it keeps up!

I desperately need a sanity check here guys. HD 89307... had no planets until this recent announcement?

Was going through updating my notes and found I already had a planet listed at HD 89307 with a mass of 2.73 M_j, semi-major axis of 4.15 AU, orbital period of 3090d, with e = 0.27 from 2004.

Well, let's assume it's an independent confirmation.

I'm still waiting for the discovery paper about the planet around Theta Cygni and that 8 Mj object at 30 Arietis B...

i was check on the extrasolar planet encyclopaedia, and planet of this paper wasn't on the extrasolar planet catalog...

http://exoplanets.org/papers/sixpack.pdf

Why?

i'm talk about of the planet of this stars on paper http://exoplanets.org/papers/sixpack.pdf

HD34445, HD126614, HD24496, HD13931,Gl 179

it's not on the extrasolar planet catalog

http://exoplanet.eu/catalog-all.php?&munit=&runit=&punit=&mode=1&more=

I sent Mr. Schneider an e-mail alerting him to the existence of these planets.
Edit: Nice find, Borislav

thank you Sirius Alha i send a e-mail for him too,

the more interesting it's that is increasing a number of M dwarf gas giants planets, and one this star HD 126614A is a tripple system of 2 M star and primary that host planet is K0V type.

The planet distance of the primary star is 2.49 AU and the second star a M dwarf is about 33 Au and 3 is M dwarf 42 if i'm not mistake

indeed this is a amazing system!

Fixed post formatting -- Sirius Alpha

that is why i like this forum, the people here is always alert in exoplanet

As far as I know, there's only one M dwarf at HD 126614. Do you have a reference for a second M dwarf?