Period derivative of the millisecond pulsar in globular cluster M28

Journal Article · Tue Mar 01 00:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/185113· OSTI ID:7251971

Foster, R S; Backer, D C; Taylor, J H; Goss, W M

The period derivative of the recently discovered 3-ms pulsar PSR 1821-24 (Lynn et al., 1987) located near the center of globular cluster M28 has been measured. While the observed slow-down rate, 1.6 x 10 to the -18th s/s, is somewhat larger than expected, it is still consistent with models of ms-pulsar evolution that involve spin-up during mass accretion from an orbiting companion star. It is possible that a substantial fraction of the observed period derivative could be the result of a gravitational encounter with a neighboring star in the cluster core. The probability of observing such an event is rather small, however. Timing residuals have so far placed constraints on the possibility of PSR 1821-24 being in a wide binary system. 15 references.

• Research Organization: California Univ., Berkeley (USA); Princeton Univ., NJ (USA); National Radio Astronomy Observatory, Soccoro, NM (USA)
• OSTI ID: 7251971
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 326; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BASIC INTERACTIONS
BINARY STARS
CONSTRAINTS
COSMIC RADIO SOURCES
GRAVITATIONAL INTERACTIONS
INTERACTIONS
MOTION
PULSARS
ROTATION
STAR CLUSTERS
STAR EVOLUTION
STARS