Comments on: Scooped! http://oklo.org/2007/05/16/scooped/ characterizing planetary systems Wed, 18 Apr 2012 18:53:22 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Blog de Astronomia do astroPT » Vários Planetas http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-33220 Blog de Astronomia do astroPT » Vários Planetas Thu, 19 Nov 2009 05:01:52 +0000 http://oklo.org/?p=213#comment-33220 [...] artigo no qual apontam para a possibilidade da estrela GJ 436, já conhecida pela importantíssima descoberta de um “Hot-Neptune” (GJ 436b) em sua órbita no ano passado, ter um outro planeta mais [...] [...] artigo no qual apontam para a possibilidade da estrela GJ 436, já conhecida pela importantíssima descoberta de um “Hot-Neptune” (GJ 436b) em sua órbita no ano passado, ter um outro planeta mais [...]

]]> By: systemic - one seven one five six redux http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-4705 systemic - one seven one five six redux Sat, 22 Mar 2008 23:59:24 +0000 http://oklo.org/?p=213#comment-4705 [...] The aggregate of data from the October 1 transit allowed us to refine the orbital properties of the planet, and additional confirming observations in a paper by Gillon (of ‘436 fame) et al have given a much better characterization of the orbit. [...] [...] The aggregate of data from the October 1 transit allowed us to refine the orbital properties of the planet, and additional confirming observations in a paper by Gillon (of ‘436 fame) et al have given a much better characterization of the orbit. [...]

]]> By: Blog de Astronomia do astroPT » Possível “Super-Earth” em torno de GJ 436 http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-4360 Blog de Astronomia do astroPT » Possível “Super-Earth” em torno de GJ 436 Tue, 22 Jan 2008 19:29:58 +0000 http://oklo.org/?p=213#comment-4360 [...] Uma equipa de astrónomos espanhóis e franceses divulgou hoje um artigo no qual apontam para a possibilidade da estrela GJ 436, já conhecida pela importantíssima descoberta de um “Hot-Neptune” (GJ 436b) em sua órbita no ano passado, ter um outro planeta mais distante com cerca de 5 vezes a massa da Terra. O planeta (GJ 436c) terá a particularidade de estar numa ressonância 2:1 com o “hot-Neptune”, mais interior. As interacções gravitacionais entre os planetas poderiam explicar a excentricidade anormal da órbita do Gliese 436b, o qual, na ausência de perturbações, deveria ter uma órbita quase circular. Os astrónomos propõem a existência do novo planeta como forma de explicar um padrão observado na velocidade radial da estrela depois de subtraído o efeito provocado pelo GJ 436b. Esta previsão poderá ser verificada através da observação cuidadosa dos trânsitos do GJ 436b, uma vez que o GJ 436c deverá provocar alterações mensuráveis na inclinação da órbita do seu vizinho mais interior. [...] [...] Uma equipa de astrónomos espanhóis e franceses divulgou hoje um artigo no qual apontam para a possibilidade da estrela GJ 436, já conhecida pela importantíssima descoberta de um “Hot-Neptune” (GJ 436b) em sua órbita no ano passado, ter um outro planeta mais distante com cerca de 5 vezes a massa da Terra. O planeta (GJ 436c) terá a particularidade de estar numa ressonância 2:1 com o “hot-Neptune”, mais interior. As interacções gravitacionais entre os planetas poderiam explicar a excentricidade anormal da órbita do Gliese 436b, o qual, na ausência de perturbações, deveria ter uma órbita quase circular. Os astrónomos propõem a existência do novo planeta como forma de explicar um padrão observado na velocidade radial da estrela depois de subtraído o efeito provocado pelo GJ 436b. Esta previsão poderá ser verificada através da observação cuidadosa dos trânsitos do GJ 436b, uma vez que o GJ 436c deverá provocar alterações mensuráveis na inclinação da órbita do seu vizinho mais interior. [...]

]]> By: systemic - A hot hot Neptune http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-2911 systemic - A hot hot Neptune Fri, 20 Jul 2007 05:08:01 +0000 http://oklo.org/?p=213#comment-2911 [...] Regular oklo readers will recall Gillon et al.’s discovery that the Neptune-mass planet orbiting the red dwarf star Gl 436 can be observed in transit. Transitsearch got scooped, and the whole eposide got me all worked up enough to neglect the exigencies of everyday academic life and reel off three straight posts on the detection and its consequences (see here, here, here, and also here). The transits of Gl 436 b are a big deal because they indicate that the planet is composed largely of water. It’s not a rock and it’s not a Jupiter-like gas giant. Rather, it’s a fully Neptune-like object, hauled in for inspection on a 2.64385 day orbit. [...] [...] Regular oklo readers will recall Gillon et al.’s discovery that the Neptune-mass planet orbiting the red dwarf star Gl 436 can be observed in transit. Transitsearch got scooped, and the whole eposide got me all worked up enough to neglect the exigencies of everyday academic life and reel off three straight posts on the detection and its consequences (see here, here, here, and also here). The transits of Gl 436 b are a big deal because they indicate that the planet is composed largely of water. It’s not a rock and it’s not a Jupiter-like gas giant. Rather, it’s a fully Neptune-like object, hauled in for inspection on a 2.64385 day orbit. [...]

]]> By: greg http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-2464 greg Sat, 19 May 2007 16:55:34 +0000 http://oklo.org/?p=213#comment-2464 Hi Joao, Nikki, Great news! I'll be writing a post later today with the latest on 436... best, greg Hi Joao, Nikki,

Great news! I’ll be writing a post later today with the latest on 436…

best,
greg

]]> By: NIKKI http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-2463 NIKKI Sat, 19 May 2007 16:07:11 +0000 http://oklo.org/?p=213#comment-2463 Hi Greg! Yesterday three young amateur astronomers (Teja Fabjan,Primož Kuk and Matej Mihelčič),from Slovenia (EU) observed transit of TrES-3! See: http://www.astronom.si/forum/index.php?topic=2617.0 Further processing is on the way! Nikolaj Štritof (NIKKI) Hi Greg!
Yesterday three young amateur astronomers (Teja Fabjan,Primož Kuk and Matej
Mihelčič),from Slovenia (EU) observed transit of TrES-3!
See:
http://www.astronom.si/forum/index.php?topic=2617.0
Further processing is on the way!
Nikolaj Å tritof
(NIKKI)

]]> By: gregas http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-2462 gregas Sat, 19 May 2007 13:19:32 +0000 http://oklo.org/?p=213#comment-2462 Hi Greg and "blog readers" I've got the GJ 436_b in transit last 17th... http://www.atalaia.org/gregorio/artigo.php?id=12 Joao aka Gregas Hi Greg and “blog readers”

I’ve got the GJ 436_b in transit last 17th…
http://www.atalaia.org/gregorio/artigo.php?id=12

Joao
aka Gregas

]]> By: Eric F Diaz http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-2460 Eric F Diaz Sat, 19 May 2007 12:14:49 +0000 http://oklo.org/?p=213#comment-2460 Hi Greg, I agree with you, Greg, that there must be a perturbing body responsible for the .16 eccentricity of GJ 436b, especially considering that this planet has been around for a very long time. But, I think I can safely say at this point, that after the fits that some of my colleagues and I have done for this system, the data for perturbing body responsible for the .16 eccentricity of GJ 436b just isn't in the directory for this system. Marcy et al need to go back to Keck and collect more RV data for this system. Maybe then we can come up with a proper characterization of this system that would account for the eccentricity of GJ 436b. At least, that is my assessment at this time. Eric Hi Greg,

I agree with you, Greg, that there must be a perturbing body responsible for the .16 eccentricity of GJ 436b, especially considering that this planet has been around for a very long time. But, I think I can safely say at this point, that after the fits that some of my colleagues and I have done for this system, the data for perturbing body responsible for the .16 eccentricity of GJ 436b just isn’t in the directory for this system. Marcy et al need to go back to Keck and collect more RV data for this system. Maybe then we can come up with a proper characterization of this system that would account for the eccentricity of GJ 436b. At least, that is my assessment at this time.

Eric

]]> By: Curious Cat Science and Engineering Blog » Hot Ice Planet http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-2444 Curious Cat Science and Engineering Blog » Hot Ice Planet Thu, 17 May 2007 11:37:54 +0000 http://oklo.org/?p=213#comment-2444 [...] Scooped!: The planet has a mass of 23 Earth-masses and an orbital period of 2.64385 days. It orbits a red dwarf star 33 light years away. The temperature on the planet is somewhere in the oven-cleaning neighborhood of 600K (327K, 620F). No habitability news stories on CNN for this fine fellow. The transit depth is a healthy 0.6%, which implies that the the planet’s radius is ~25,000 km. That’s four times that of the Earth, and essentially identical to the 24,764 km radius of Neptune. [...] [...] Scooped!: The planet has a mass of 23 Earth-masses and an orbital period of 2.64385 days. It orbits a red dwarf star 33 light years away. The temperature on the planet is somewhere in the oven-cleaning neighborhood of 600K (327K, 620F). No habitability news stories on CNN for this fine fellow. The transit depth is a healthy 0.6%, which implies that the the planet’s radius is ~25,000 km. That’s four times that of the Earth, and essentially identical to the 24,764 km radius of Neptune. [...]

]]> By: Astrolink [Global Edition] » Astrosphere for May 16, 2007 | Latest astronomy news in 11 languages http://oklo.org/2007/05/16/scooped/comment-page-1/#comment-2439 Astrolink [Global Edition] » Astrosphere for May 16, 2007 | Latest astronomy news in 11 languages Wed, 16 May 2007 18:40:08 +0000 http://oklo.org/?p=213#comment-2439 [...] One of the most important extrasolar planetary discoveries of the year was announced yesterday - a new Neptune-sized planet. Since there wasn’t an official press release, the news has been gathering slowly. A few bloggers have already jumped on the story and have some analysis. systemic, and Centauri Dreams both have great articles. I’ll get mine done in a few hours. [...] [...] One of the most important extrasolar planetary discoveries of the year was announced yesterday – a new Neptune-sized planet. Since there wasn’t an official press release, the news has been gathering slowly. A few bloggers have already jumped on the story and have some analysis. systemic, and Centauri Dreams both have great articles. I’ll get mine done in a few hours. [...]

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