Planets in the Praesepe Cluster

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Planets in the Praesepe Cluster

Post by Sirius_Alpha on 4th July 2012, 8:51 pm

Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster
http://arxiv.org/abs/1207.0818

We present the discovery of two giant planets orbiting stars in Praesepe (also known as the Beehive Cluster), the first known hot Jupiters in an open cluster. Pr0201b orbits a V=10.52 late F dwarf with a period of 4.4264 +/- 0.0070 days and has a minimum mass of 0.540 +/- 0.039 Mjup, and Pr0211b orbits a V=12.06 late G dwarf with a period of 2.1451 +/- 0.0012 days and has a minimum mass of 1.844 +/- 0.064 Mjup. Because they reside in a cluster, the ages of these planets are amongst the best-determined of any planet outside our own solar system. As we endeavor to learn more about the frequency and characteristics of planets, the environment in which most stars form -- open clusters like Praesepe -- may provide essential clues to this end. This discovery will allow, for the first time, a direct estimate of the short-period giant planet frequency in open clusters.

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Re: Planets in the Praesepe Cluster

Post by Lazarus on 5th July 2012, 2:30 am

Nice, these join Epsilon Tauri, BD-132130 and TYC 8975-2606-1 as some of the few known planet hosts in open clusters. First cluster with two known planets.
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Re: Planets in the Praesepe Cluster

Post by Sirius_Alpha on 14th September 2012, 2:25 pm

Press Release
First Planets Found Around Sun-Like Stars in a Cluster

Feels like the good-ole days, with hot Jupiters making ample material for press releases Laughing Razz

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Re: Planets in the Praesepe Cluster

Post by Lazarus on 15th September 2012, 6:02 pm

Sirius_Alpha wrote:Feels like the good-ole days, with hot Jupiters making ample material for press releases Laughing Razz
Party like it's 1995... cheers
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Re: Planets in the Praesepe Cluster

Post by Sunchaser on 16th September 2012, 9:37 am

WHOO-HOOOOO!!!

-M-

But can you imagine the night skies there?
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Re: Planets in the Praesepe Cluster

Post by Sirius_Alpha on 16th September 2012, 3:38 pm

Sunchaser wrote:But can you imagine the night skies there?
Lots of light pollution from glowing winds from the dayside Razz

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Re: Planets in the Praesepe Cluster

Post by Sirius_Alpha on 1st February 2016, 9:54 pm

A second, long-period giant planet around Pr0211.

The GAPS programme with HARPS-N at TNG XI. Pr~0211 in M~44: the first multi-planet system in an open cluster
http://arxiv.org/abs/1602.00009

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Re: Planets in the Praesepe Cluster

Post by Edasich on 30th March 2016, 12:17 pm

Finally Pr 0211 c is listed at EPE:

http://exoplanet.eu/catalog/pr_0211_c/

Anyway might anyone notify EPE webmaster that four double entries are hindering actual exoplanet count there? Pr 0211 b, HD 4732 b & c and KOI-2828 b are listed twice.
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Re: Planets in the Praesepe Cluster

Post by Lazarus on 30th March 2016, 3:10 pm

Personally I think it more worthwhile to try and improve the Open Exoplanet Catalogue...
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