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Pulsar-irradiated stars in dense globular clustersWe discuss the properties of stars irradiated by millisecond pulsars in 'hard' binaries of dense globular clusters. Irradiation by a relativistic pulsar wind as in the case of the eclipsing millisecond pulsar PSR 1957+20 alter both the magnitude and color of the companion star. Some of the blue stragglers (BSs) recently discovered in dense globular clusters can be irradiated stars in binaries containing powerful millisecond pulsars. The discovery of pulsar-driven orbital modulations of BS brightness and color with periods of a few hours together with evidence for radio and/or gamma-ray emission from BS binaries would valuably contribute to the understanding of the evolution of collapsed stars in globular clusters. Pulsar-driven optical modulation of cluster stars might be the only observable effect of a new class of binary pulsars, i.e., hidden millisecond pulsars enshrouded in the evaporated material lifted off from the irradiated companion star.
Document ID
19930061293
Document Type
Reprint (Version printed in journal)
Authors
Tavani, Marco (California Univ. Berkeley, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Astronomy and Astrophysics
Volume: 261
Issue: 2
ISSN: 0004-6361
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: W-7405-ENG-48
Distribution Limits
Public
Copyright
Other