Journal or Publication Title:

Բյուրականի աստղադիտարանի հաղորդումներ: Երևանի աստղադիտարանի բյուլետեն = Сообщения Бюраканской обсерватории. Бюллетень ереванской Астрономической обсерватории = Contributions from the Burakan observatory. Bulletin of the Erevan astronomical observatory

Date of publication:

2026

Volume:

73

Number:

1

ISSN:

2579-2276

Coverage:

220-226

Abstract:

This fifth paper of a series on pulsars and millisecond pulsars (MSPs) looks at the observational side of the problem. We review the facilities that detect pulsars in different wavebands and the catalogues that collect their parameters, and we compare the pulsars of globular clusters (GCs) with those of the Galactic field (GF), using version 2.9.0 of the ATNF Pulsar Catalogue and the list of 372 GC pulsars in 46 clusters maintained by P. Freire. MSPs make up 94% of the GC pulsars and 15% of the GF pulsars, and GCs host 36% of the MSPs known in the Milky Way. Binary MSPs in GCs have shorter orbits than those in the GF, with median orbital periods of 1.1 and 4.8 days, and are more often eccentric, 16% against 5% with e > 0.1. The isolated fraction of GC MSPs is 86% in core-collapsed clusters and 42% in the others. The spin periods of the two populations differ only when the comparison is restricted to fully recycled MSPs, and 45% of the GC MSPs with a measured period derivative show a negative value, so that fields and ages derived from them are biased. We relate these results to the seven evolutionary scenarios of this series and to current simulations, and end with nine observational benchmarks for cluster models that follow pulsars.

Format:

pdf

Identifier:

oai:arar.sci.am:441864

General note:

Communications of the Byurakan Astrophysical Observatory (ComBAO) is a peer-reviewed scientific journal, which publishes research in observational and theoretical astronomy/astrophysics and presents recent advances in these fields. It is being published by the NAS RA V. Ambartsumian Byurakan Astrophysical Observatory (BAO) in English in electronic form. The journal publishes original papers, review papers, brief reports, book reviews, special communications, observational and theoretical results in various fields of astronomy and related sciences, and some editorial notes, including anniversaries and obituaries. Under the heading “Legacy”, the renewed magazine will republish some old articles of high value in English. The heading “Guest articles” will bring to the attention of readers the articles of researchers who are not employees of BAO. ComBAO was founded in 1946 and regularly published in 1946-1990. However, the publication was interrupted because of the economic situation after the disintegration of the Soviet Union in 1991.

Location of original object:

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