December 28, 2011

Common Oort Cloud for a multi-stellar system?

Filed under: Letters from Ionia — Tags: — zankaon @ 1:01 am

Hipparcus indicates that our supposed closest star alpha Centuari is 742 marcs parallax, which corresponds to about 1.3 pc or 4.3 yrs away. Stars form in  multiple, such as for clusters of 100s -1000s. Some such sister stars must be close by; thus our sun has sister stars at closer distance, with higher parallax values. Look to the sky; all things being equal, brighter means closer. Also infrared telescope could be used to look for cold gas giants, and compare image size for relative closeness. In fact does the Brown dwarf survey, and other surveys, include some large infrared planets which might indicate a nearby sister star? Such sister stars would have a center of mass, and hence via central force, one would have a spherical distributed cometary cloud ‑ a common Oort cloud. So does our Oort cloud enclose a multi‑stellar system? TMM


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