Soft X-rays from the intermediate-age open cluster NGC 752.

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Stars: Activity, Open Clusters And Associations: Individual: Ngc 752, X-Rays: Stars

Scientific paper

A ROSAT PSPC observation of NGC 752 detects 49 sources. Seven sources are tentatively identified with optical cluster members, of which three are short-period binaries, one is a blue straggler, and one a rapid rotator. The eclipsing binary DS And - also a cluster member - is probably detected as well. The X-ray properties of these sources are similar to those of RS CVn binaries with the same absolute magnitude and colour in the galactic disk.

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