| Rossiter-McLaughlin effect | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Rossiter-McLaughlin effect 5th July 2008, 5:28 pm | |
| How many planets have had their Rossiter-McLaughlin effect measured? So far, I know of only eight... CoRoT-Exo-2 b | 7.2° | HAT-P-1 b | 3.7° | HD 17156 b | 9.4° | HD 147506 b (HAT-P-2 b) | 14° | HD 149026 b | -12° | HD 189733 Ab | -1.4° | HD 209458 b | -4.4° | TrES-1 b | 30° |
Are there any more? _________________ Caps Lock: Cruise control for 'Cool'!
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Edasich dK star
Number of posts : 2289 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Rossiter-McLaughlin effect 6th July 2008, 6:25 am | |
| Neither I do know what is this effect. Shame on me XD | |
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Stalker Jovian
Number of posts : 540 Age : 33 Location : Paris, France Registration date : 2008-06-16
| Subject: Re: Rossiter-McLaughlin effect 6th July 2008, 8:23 am | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Rossiter-McLaughlin effect 6th July 2008, 9:32 am | |
| When a planet transits its star, a small wave-like feature in the radial velocity data. As the planet starts the transit, it blocks a bit of the light from the stellar hemisphere that is moving toward the telescope (due to stellar rotation), while the other hemisphere which is moving away from the telescope is unblocked. This causes a tiny change in the RV data, and shows up as a tiny dip or depression in the RV curve. As the planet moves to the centre of the stellar disk, the depression rises to normal, then heads up, as the planet is transiting the other stellar hemisphere, the one moving away from the telescope. The shape of the wave can indicate the angle between the orbit of the planet and the rotation of the star. _________________ Caps Lock: Cruise control for 'Cool'!
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Edasich dK star
Number of posts : 2289 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Rossiter-McLaughlin effect 7th July 2008, 4:48 am | |
| Excellent, thanks | |
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Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
| Subject: Re: Rossiter-McLaughlin effect 7th July 2008, 7:21 am | |
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Edasich dK star
Number of posts : 2289 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Rossiter-McLaughlin effect 7th July 2008, 7:47 am | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Rossiter-McLaughlin effect 7th July 2008, 3:08 pm | |
| _________________ Caps Lock: Cruise control for 'Cool'!
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Rossiter-McLaughlin effect 31st July 2008, 8:12 pm | |
| This paper, http://arxiv.org/abs/0807.4929 , gives the Spin-Orbit alignment for HD 189733 b, HD 209458 b, HAT-P-1 b, CoRoT-Exo-2 b, HD 17156 b, TrES-2 b, HAT-P-2 b, HD 149026 b, XO-3 b, WASP-14 b, and TrES-1 b. _________________ Caps Lock: Cruise control for 'Cool'!
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Darkness nova Asteroid
Number of posts : 69 Location : Octans Registration date : 2008-06-12
| Subject: Re: Rossiter-McLaughlin effect 2nd August 2008, 6:15 pm | |
| Hmm. Don't you think most planets that are measured by transiting would have had this measured? Or does this require a separate measuring method to detect from regular transiting methods? | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Rossiter-McLaughlin effect 2nd August 2008, 6:41 pm | |
| It requires sufficiently accurate radial velocity measurements, and a sufficient amount of them. I think those are somewhat hard to come by for a lot of transiting planets, as they typically orbit dim stars. For example, with HD 189733 b, we have lots and good RV measurements, and the Rossiter-McLaughlin effect is easily visible: But with WASP-1, we have less measurements, and they're not as accurate: _________________ Caps Lock: Cruise control for 'Cool'!
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Darkness nova Asteroid
Number of posts : 69 Location : Octans Registration date : 2008-06-12
| Subject: Re: Rossiter-McLaughlin effect 3rd August 2008, 1:42 pm | |
| Ah I sees.
My searches have turned up nothing that hasn't already been stated. However why not ask some of the other extrasolar sites like the extrasolar planetary encyclopedia or remake the list whatmoungh had started to include these things into there data so that we might have a list of this and other effects of extrasolar systems? That way we can find these things out alot more quickly and more easily.
Maybe I should put this into suggestions..... | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Rossiter-McLaughlin effect 3rd August 2008, 1:49 pm | |
| That's a pretty good idea. If you want, contact Jean Schneider at the Extrasolar Planets Encyclopaedia and give him the idea. _________________ Caps Lock: Cruise control for 'Cool'!
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| Subject: Re: Rossiter-McLaughlin effect | |
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| Rossiter-McLaughlin effect | |
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