skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Gravitational light bending near neutron stars. I. Emission from columns and hot spots

Abstract

The beam shapes, pulse profiles, and spectral transmission function at infinity for the radiation originating in columns or hot spots on slowly rotating neutron stars, represented by the Schwarzschild metric, are calculated. These are used for models for binary accreting pulsars and may apply to isolated neutron stars as well. The shadowing effects and their interplay with the frequency changes as a function of the observer angle are discussed. The observed bolometric beam shapes and pulse profiles are given as a function of radius, as well as observed pulse-phase spectra and frequency-dependent pulse profiles, for various types of source functions at the surface. The more realistic accretion (or emission) column geometry used indicates that these may show a larger degree of modulation than was previously thought, as compared to hot spots. The observational implications for X-ray-emitting pulsars are discussed. 24 references.

Authors:
;
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park (USA)
OSTI Identifier:
6996129
Resource Type:
Journal Article
Journal Name:
Astrophys. J.; (United States)
Additional Journal Information:
Journal Volume: 325
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; NEUTRON STARS; STELLAR RADIATION; PULSARS; X RADIATION; BINARY STARS; ROTATION; SCHWARZSCHILD METRIC; STAR ACCRETION; COSMIC RADIO SOURCES; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; METRICS; MOTION; RADIATIONS; STAR EVOLUTION; STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources

Citation Formats

Riffert, H, and Meszaros, P. Gravitational light bending near neutron stars. I. Emission from columns and hot spots. United States: N. p., 1988. Web. doi:10.1086/165996.
Riffert, H, & Meszaros, P. Gravitational light bending near neutron stars. I. Emission from columns and hot spots. United States. https://doi.org/10.1086/165996
Riffert, H, and Meszaros, P. 1988. "Gravitational light bending near neutron stars. I. Emission from columns and hot spots". United States. https://doi.org/10.1086/165996.
@article{osti_6996129,
title = {Gravitational light bending near neutron stars. I. Emission from columns and hot spots},
author = {Riffert, H and Meszaros, P},
abstractNote = {The beam shapes, pulse profiles, and spectral transmission function at infinity for the radiation originating in columns or hot spots on slowly rotating neutron stars, represented by the Schwarzschild metric, are calculated. These are used for models for binary accreting pulsars and may apply to isolated neutron stars as well. The shadowing effects and their interplay with the frequency changes as a function of the observer angle are discussed. The observed bolometric beam shapes and pulse profiles are given as a function of radius, as well as observed pulse-phase spectra and frequency-dependent pulse profiles, for various types of source functions at the surface. The more realistic accretion (or emission) column geometry used indicates that these may show a larger degree of modulation than was previously thought, as compared to hot spots. The observational implications for X-ray-emitting pulsars are discussed. 24 references.},
doi = {10.1086/165996},
url = {https://www.osti.gov/biblio/6996129}, journal = {Astrophys. J.; (United States)},
number = ,
volume = 325,
place = {United States},
year = {1988},
month = {2}
}