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:

2025

Volume:

72

Number:

1

ISSN:

2579-2276

Coverage:

55-77

Abstract:

This study investigates the evolutionary spin behaviors, both spin-down and spin-up, of canonical pulsars and millisecond pulsars (MSPs) in the unique dynamical environments of globular clusters, with a particular focus on identifying distinct evolutionary channels that can be modeled using direct N body simulations (via NBODY6++GPU). Leveraging observational data from the ATNF Pulsar Catalogue, we compile a sample of 80 pulsars divided into four populations: normal and millisecond pulsars in both the Galactic field and globular clusters. Through detailed analysis of pulsar spin periods (P) and their derivatives (P˙), along with derived quantities such as surface magnetic field strength (B), rotational energy loss rate (E˙), and characteristic age (τc), we construct a comprehensive P–P˙ diagram that captures the physical and evolutionary diversity of these sources. This visualization not only delineates the classical separation between young, high-B, high-P˙ pulsars and recycled MSPs, but also reveals population-dependent patterns shaped by environmental influences such as stellar encounters, binary exchanges, and accretion-induced spin-up mechanisms. We identify seven distinct evolutionary scenarios that describe the spin evolution of pulsars in globular clusters, including tidal spin-up, exchange interactions, accretion from low-mass companions, magnetic field decay, and triple system evolution. Each scenario outlines a possible formation channel for observed pulsar properties and is suitable for forward modeling using direct N-body methods coupled with binary stellar evolution recipes. By integrating pulsar observational data with astrophysical modeling requirements, this work lays the foundation for self-consistent simulation frameworks aimed at reproducing observed pulsar populations in dense stellar systems. The results have implications for neutron star retention, recycling pathways, and the long-term dynamical evolution of stellar clusters harboring MSPs.

Format:

pdf

Identifier:

oai:arar.sci.am:425915

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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