Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

The semicentennial binary system PSR J2032+4127 at periastron: X-ray photometry, optical spectroscopy, and SPH modelling

Coe, MJ, Okazaki, AT, Steele, IA, Ng, C-Y, Ho, WCG, Lyne, AG, Stappers, B, Johnson, TJ, Ray, PS and Kerr, M (2019) The semicentennial binary system PSR J2032+4127 at periastron: X-ray photometry, optical spectroscopy, and SPH modelling. Monthly Notices of the Royal Astronomical Society, 485 (2). pp. 1864-1875. ISSN 0035-8711

[img]
Preview
Text
The semicentennial binary system PSR J2032+4127 at periastron X-ray photometry, optical spectroscopy, and SPH modelling.pdf - Published Version

Download (3MB) | Preview

Abstract

X-ray photometry and optical spectra are presented covering the periastron passage of the highly eccentric, ∼50 yr binary system PSR J2032+4127 in 2017 November. This system consists of a 143 ms pulsar in orbit around a massive OB star, MT 91-213. The data show dramatic changes during the encounter as the pulsar wind collided with the stellar wind. The X-ray flux rose on the approach to periastron, then underwent a major dip in the few days around periastron, and then gradually declined over the next few weeks. The optical spectroscopy revealed a steady decline in the H α line strength on the approach to periastron (from an equivalent width of −15 to −7 Å) implying a truncation of the OB star’s circumstellar disc by the approaching neutron star. Smooth particle hydrodynamic modelling is used here to model the system within the context of the observed behaviour and predict the geometrical configuration of the circumstellar disc with respect to the pulsar’s orbit.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2019 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical and Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 06 Aug 2019 10:08
Last Modified: 06 Aug 2019 10:15
DOI or Identification number: 10.1093/mnras/stz515
URI: http://researchonline.ljmu.ac.uk/id/eprint/11146

Actions (login required)

View Item View Item