ntc 2 Posted August 27, 2015 Share Posted August 27, 2015 Is it an optical double or are the two main stars bound by gravity? I've read both theories so I wonder if someone has a more definite answer and can quote scientific references... Link to post Share on other sites
Gutross 133 Posted August 27, 2015 Share Posted August 27, 2015 the answer was touched on in this threadhttp://stargazerslounge.com/topic/250441-polaris-and-albireo/it is a visual double rather then bound Link to post Share on other sites
Stu 31,303 Posted August 27, 2015 Share Posted August 27, 2015 It seems like it is not necessarily clear, and if they are they have a very long orbital period.I found this link referenced on SkySafari which seems science based.http://stars.astro.illinois.edu/sow/albireo.html Link to post Share on other sites
Owmuchonomy 2,504 Posted August 27, 2015 Share Posted August 27, 2015 Unsure as discussed above but Component A is a true double in itself. 1 Link to post Share on other sites
Perseus_m45 87 Posted August 27, 2015 Share Posted August 27, 2015 there are a goodly amount of stars in this system . And Beta 2 Cyg is listed as the B star .mike h Link to post Share on other sites
Perseus_m45 87 Posted August 27, 2015 Share Posted August 27, 2015 there are a goodly amount of stars in this system . And Beta 2 Cyg is listed as the B star .mike hAs for myself I will consider it a true double until proven wrong . mike h Link to post Share on other sites
lunator 263 Posted August 28, 2015 Share Posted August 28, 2015 The is continuing debate on this.I hope it is a gravitationally bound system but i doubt we will know for certain in my lifetime.CheersIan Link to post Share on other sites
ntc 2 Posted August 30, 2015 Author Share Posted August 30, 2015 Given what we know about the positions and masses of the three components (Albireo A, B and C), isn't it just a matter of calculation?Or would the result be dependent on the data's interval of uncertainty (like Albireo A's distance, which is 430 ± 20 ly according to wikipedia)? Link to post Share on other sites
ntc 2 Posted August 30, 2015 Author Share Posted August 30, 2015 I'm rooting for physical double too btw. Link to post Share on other sites
jabeoo1 1,272 Posted August 30, 2015 Share Posted August 30, 2015 Will the ESA's Gaia have some decent data on this in the near future ? Link to post Share on other sites
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