Location of pulsar and companion star (IMAGE)

University of California - Berkeley

Location of pulsar and companion star

Caption

Astronomers measured the velocity of a faint star (green circle) that has been stripped of nearly its entire mass by an invisible companion, a neutron star and millisecond pulsar that they determined to be the most massive yet found and perhaps the upper limit for neutron stars. The objects are in the constellation Sextans.

Credit

W. M. Keck Observatory, Roger W. Romani, Alex Filippenko

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