Arcadian Functor

occasional meanderings in physics' brave new world

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Location: New Zealand

Marni D. Sheppeard

Monday, August 24, 2009

Big Jupiters

More really cool websites: the extrasolar planet encyclopaedia has an interactive tool for both extrasolar planet and star data. For example, I created this plot of star metallicity against planet period:


Blogger nige said...

On the graph, I can't understand why the ratio of mass of iron to hydrogen can take negative values. What does that mean? (Has someone discovered that the iron in some planets is antimatter?)

August 24, 2009 11:00 PM  
Blogger Kea said...

Nigel, view the link on metallicity. Most star measures are defined in terms of the sun - in this case by taking the difference of 2 logarithms.

August 25, 2009 12:09 AM  
Blogger nige said...

Thanks! I think the simple ratio label [Fe/H] on the axis is just a little misleading if it is logarithmic. But that's the software.

August 25, 2009 12:50 AM  

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