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Mysterious

The mysterious ... Several theories attempt to explain why they do not show their real age, but scientists do not have enough observations to test each hypothesis.

Armed with these observations, Aaron M. Geller, of Northwestern University in Chicago, Illinois, and Robert Matthew of the University of Wisconsin- Madison, reported that a mechanism known as the transfer of matter, explains the origin of blue stragglers. In essence, the blue stragglers are eating a lot, or outer shell, its giant companion star. This extra fuel allows laggards continue to burn and live longer, while the companion star is bare, leaving only its core white dwarf.
The majority of blue stragglers have companion star. ... ... And it points directly to the origin of the mass transfer ...
Astronomers have studied the cluster NGC 188, which is located in the constellation Cepheus, which is located in the sky near the North Star. This cluster is one of the oldest star clusters, but it is fraught with these mysterious, youthful blue stragglers stars.
The cluster is about 3000 stars, all roughly the same age, and 21 blue peeled. Geller and Matthew used the detailed observations of stragglers in NGC 188 from WIYN Observatory in Tucson, Arizona. They used the information for analysis and comparison of the three main theories of education blue lag behind: the clash between the stars, the merger of the stars and the mass transfer from one star to another. The only thing that came was the theory of mass transfer. WIYN data show that each companion star weighs about half the mass of the Sun, which is consistent with white dwarf.
Two other theories of origin - the collision and merging - require the presence of more massive companion star. ... ...
Geller, Matthew, and their colleagues about a year of observations with the Hubble Space Telescope will be able to say, or the satellites of blue stragglers are indeed the white dwarf.