Query : 2005A&A...429..489Z

2005A&A...429..489Z - Astronomy and Astrophysics, volume 429, 489-495 (2005/1-2)

Gamma-ray luminosity properties of gamma-ray pulsars.


Abstract (from CDS):

Based on a new self-consistent outer gap model, we statistically study luminosity properties of γ-ray pulsars with ages of ≤2x107yr in the Galaxy as well as those with ages of ≤5x106yr in the Gould belt using a Monte Carlo method, where the γ-ray beaming effect has been included. Generally, the relation between γ-ray luminosity, Lγ, and pulsar spin-down power, Lsd, can be expressed as Lγ ∝Lδsd, where δ is a parameter that depends on the galactic latitude and the γ-ray threshold. For a given γ-ray threshold (for example, the EGRET threshold or GLAST threshold), the parameter δ is an increasing function of the galactic latitude. For the EGRET threshold, δ changes smoothly with the galactic latitude. For the GLAST threshold, however, δ has a minimum at |b|≤5°, and δ increases by a factor of ∼2 at the range of |b|=5°-10° relative to δ at |b|≤ 5°, and then increases smoothly as the galactic latitude further increases. The reason for this is that high galactic latitude γ-ray pulsars are dominated by mature pulsars. In fact, the ratio of γ-ray pulsars with their ages of >106yr to all simulated γ-ray pulsars also increases with the galactic latitude. For the γ-ray pulsars produced in a fixed range of galactic latitude, the parameter δ increases slightly with the sensitivity of γ-ray detector.

Abstract Copyright:

Journal keyword(s): gamma-rays: theory - stars: pulsars: general - stars: neutron - stars: statistics

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12906 0
2 NAME Gould Belt PoG ~ ~           ~ 797 1

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