Number of posts : 4320 Location : Earth Registration date : 2008-04-06
Subject: 18 Sco - Solar twin 23rd June 2014, 7:04 pm
18 Sco: a solar twin rich in refractory and neutron-capture elements. Implications for chemical tagging http://arxiv.org/abs/1406.5244
Quote :
... We use precise HARPS radial velocities to search for planets, but none were detected. ...
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Stalker Jovian
Number of posts : 540 Age : 33 Location : Paris, France Registration date : 2008-06-16
Subject: Re: 18 Sco - Solar twin 24th June 2014, 2:07 am
Neutron capture elements... In a main sequence star? O_o
I think I missed something on my readings about nucleosynthesis and stellar evolution...
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Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
Subject: Re: 18 Sco - Solar twin 24th June 2014, 2:29 pm
Planet detection limit is about ~10 Earth masses at 1 day, so definitely room for a set of low-mass planets there. Edge-on Jupiter-clones seem to be ruled out.
Enhancement in refractory elements relative to the Sun might mean more planetary material fell into it?
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