Gliese 892 - six planets (as least one planet in transit)

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Gliese 892 - six planets (as least one planet in transit)

Post by za-neptunie on 19th July 2015, 8:19 am

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

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 19th July 2015, 9:26 am

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

Interesting

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 19th July 2015, 9:28 am



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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Shellface on 19th July 2015, 9:50 am

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.

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by za-neptunie on 19th July 2015, 9:52 am

Stalker wrote:isnt it better?

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

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 19th July 2015, 10:07 am

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.

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by za-neptunie on 19th July 2015, 10:14 am

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)

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 19th July 2015, 11:03 am

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

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by tommi59 on 19th July 2015, 2:26 pm

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

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 19th July 2015, 3:38 pm

It seems that the radius was not made public yet.

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by tommi59 on 19th July 2015, 4:57 pm

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

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 19th July 2015, 5:05 pm

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

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Shellface on 19th July 2015, 5:32 pm

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.)


Last edited by Shellface on 21st July 2015, 8:53 pm; edited 4 times in total

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Lazarus on 19th July 2015, 6:08 pm

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.

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Shellface on 19th July 2015, 7:25 pm

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!

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by tommi59 on 20th July 2015, 3:14 am

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


Last edited by tommi59 on 20th July 2015, 1:18 pm; edited 1 time in total

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Edasich on 20th July 2015, 6:05 am

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. Very Happy

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 20th July 2015, 9:41 am

tommi59 wrote:Is at least  planets but it will be the same story like with 3 additional planets around 61 virgo never announced
Hu?

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by tommi59 on 20th July 2015, 1:20 pm

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


Last edited by tommi59 on 20th July 2015, 4:28 pm; edited 1 time in total

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Stalker on 20th July 2015, 3:46 pm

Where?

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HD 219134 - Four-planet system with transiting rocky super-Earth around naked-eye star

Post by Sirius_Alpha on 30th July 2015, 5:43 pm

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-

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Lazarus on 30th July 2015, 5:47 pm

Same system as Gliese 892.

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Led_Zep on 30th July 2015, 5:47 pm

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

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Sirius_Alpha on 30th July 2015, 5:56 pm

Lazarus wrote:Same system as Gliese 892.
D'oh. Merged. Thank-you.

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Re: Gliese 892 - six planets (as least one planet in transit)

Post by Lazarus on 30th July 2015, 6:00 pm

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

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Re: Gliese 892 - six planets (as least one planet in transit)

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