Gliese 892 / HD 219134 - six planets (at least one planet in transit)

http:/ /za-neptunie.livejour nal. com/147885.html  (remove gaps in reference)

http://za-neptunie.livejournal.com/147885.html isnt it better?

Interesting

WHAT.

Gliese 892 is the seventh nearest G-type star. At V = 5.5, it's visible to the naked eye. It was one of the targets of the first-ever radial velocity planet seach. It's not a well-known star, but it sure will be after this.

Stalker wrote:

isnt it better?

Yes. New users are forbidden to give references at this forum.

If you want to link for us your blogposts (I think you are welcome), please translate something as short and complet as an abstract. I can read and understand russian but i'm almost the only one.

Stalker wrote:

If you want to link for us your blogposts (I think you are welcome), please translate something as short and complet as an abstract. I can read and understand russian but i'm almost the only one.

I do not know much English, so I will say that the slides are taken from video of the conference.

http ://exoplanets.astro.yale.edu/workshop/EPRV/Program. html (remove gaps in reference)

When I joined this forum, I also was very bad in english. Now I'm still bad but I can communicate with everyone

I did not find any reference on radius of gliese 892 b only reference about 19 earth mass planet at 0.17 AU around gl 687

It seems that the radius was not made public yet.

It is expected to be published soon ? Whole system I mean

The tableau seems tobe cropped from a PDF in the style of a peer review so I guess its in the processus of publication.

They wouldn't bother announcing it if the publication wasn't ready, I imagine.

I haven't got to the part of the conference where they talk about the system yet, but inspecting the slides, it looks like there are 5 planets, not 6. I think the 1190-day signal in the first slide is the same as the 2334-day signal in the second, but the first is based on less data (only APF, I imagine)(Actually, that's HARPS-N).

(Deadit: Hm. The person advertising the Keck+APF poster says 6 planets, but the picture only shows 5 signals. Not sure how to interpret that…)

(Breadit: I finally got to the poster. The sixth signal is a candidate at 94 days. The long-period signal is possibly magnetic.)

Shellface wrote:

Gliese 892 is the seventh nearest G-type star.

Wait a second, SIMBAD lists it as a K3V... and all the MK measurements also give K3V.

Lazarus wrote:

Wait a second, SIMBAD lists it as a K3V... and all the MK measurements also give K3V.

Oh. Hah. It's been so long since I'd thought about that star that I misremembered its spectral type. It's the 14th nearest K-dwarf, I think.

Whatever! It's 6.5 parsecs away. That's crazy!

Is at least 5 planets but it will be the same story like with 3 additional planets around 61 virgo never announced

Lazarus wrote:

Shellface wrote:

Gliese 892 is the seventh nearest G-type star.

Wait a second, SIMBAD lists it as a K3V... and all the MK measurements also give K3V.

It is one of the closest K dwarfs indeed:

http://www.solstation.com/stars/hr8832.htm

Glad to see more planets around nearby stars.

tommi59 wrote:

Is at least  planets but it will be the same story like with 3 additional planets around 61 virgo never announced

Hu?

I meant in past I saw similar slides from conference 2 years ago about 61 virginis (at least 5 planets system) like this one  about gl 892 and still they did not make any announcement about new planets around 61 virgo so I am not so sure about any quick announcement about gl 892

Where?

Um, Wow! HARPS-N + Spitzer team up to give us a transiting rocky super-Earth around a naked-eye star. This is going to become a *very* well-studied planet (Three more planets were also found, making this a four-planet system).

http://www.spitzer.caltech.edu/news/1792-ssc2015-02-NASA-s-Spitzer-Confirms-Closest-Rocky-Exoplanet-

Same system as Gliese 892.

also :
https://www.cfa.harvard.edu/news/2015-16

Lazarus wrote:

Same system as Gliese 892.

D'oh. Merged. Thank-you.

As regards the question of the two additional planets, see the end of the paper:

Quote :

Note added in proof. During the refereeing process, we learned about an independent detection by Vogt et al. (Laughlin, private communication) reporting additional planets in the system, based on long-term radial velocities obtained with the Keck and APF telescopes.

So presumably there's (at least) another paper to come regarding this system...