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Fomalhaut and HR 8799 systems? (Read 2539 times)
EDG
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Fomalhaut and HR 8799 systems?
11/15/08 at 10:15:34
 
Anyone tried to make these in grav sim yet? Does anyone have the most up to date info on them too? All I can find is on wiki right now, but it doesn't look like there's much information available yet (no eccentricities for the HR 8799 system).
 
http://en.wikipedia.org/wiki/Fomalhaut
http://en.wikipedia.org/wiki/HR_8799
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frankuitaalst
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Re: Fomalhaut and HR 8799 systems?
Reply #1 - 11/15/08 at 11:23:03
 
Here's the reference paper of the discovery .
http://exoplanet.eu/papers/exo_science.pdf
No data till yet about eccentricity .  
Other orbital parameters have still a lot of sigma .  
GREAT job for the team !
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Tony
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Re: Fomalhaut and HR 8799 systems?
Reply #2 - 11/15/08 at 13:17:51
 
Maybe there's stuff to discover about the system with Gravity Simulator.  The wiki page talks about a brown dwarf at 5 AU, and that its eccentricity may have implications on the structure of the dust cloud.
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EDG
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Re: Fomalhaut and HR 8799 systems?
Reply #3 - 11/15/08 at 15:17:51
 
I think the HR 8799 discoverers work just down the road from me at the HIA (Herzburg Institute of Astrophysics)!
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mazda
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Re: Fomalhaut and HR 8799 systems?
Reply #4 - 11/17/08 at 03:45:59
 
Here is the data for planet Fomalhaut B:
 
http://exoplanet.eu/planet.php?p1=Fomalhaut&p2=b
 
And here is the data for the disc :
 
Inclination: 1.5
Excentricity: 0.11
 
reference: http://arxiv.org/abs/0811.1985
 
Fomalhaut B is coplanar with the disc, so, your inclination is also 1.5
 
 
 
 
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frankuitaalst
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Re: Fomalhaut and HR 8799 systems?
Reply #5 - 11/17/08 at 12:42:36
 
A really interesting animation of the system can be found here ( can take some while to download )  
http://astro.berkeley.edu/~echiang/fomalhaut/fomalhaut_chiang_model.mov
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