Small, or just invisible?
MAUREEN MCALLISTER, WAYNE, ILL.
The companion to PSR B1516+02B is very likely a white dwarf star, says Paulo Freire of Arecibo Observatory in Puerto Rico. White dwarfs are faint, and become harder to detect as they grow older and cooler. Few companions to millisecond pulsars have ever been directly detected, but those that have are almost all white dwarfs. Freire adds that dark matter seems to clump at galactic scales, and that he is not aware of any theoretical predictions of clark matter able to form small objects like stars.--RON COWEN
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|Author:||McAllister, Maureen; Cowen, Ron|
|Article Type:||Letter to the editor|
|Date:||Feb 9, 2008|
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