AustralieFrV1, Main, Exploration, bibRecord, 006735

SUB-LUMINOUS y-RAY PULSARS

Identifieur interne : 006735 ( Main/Exploration ); précédent : 006734; suivant : 006736

SUB-LUMINOUS y-RAY PULSARS

Auteurs : R. W. Romani [États-Unis] ; M. Kerr [États-Unis] ; H. A. Craig [États-Unis] ; S. Johnston [Australie] ; I. Cognard [France] ; D. A. Smith [France]

Source :

The Astrophysical journal [ 0004-637X ] ; 2011.

RBID : Pascal:11-0411236

Descripteurs français

Pascal (Inist)
- Pulsar radio, Luminosité, Borne supérieure, Alignement, Domaine énergie GeV, Rayonnement gamma.

English descriptors

KwdEn :
- Alignment, Gamma radiation, GeV range, Luminosity, Radiopulsar, Upper bound.

Abstract

Most pulsars observed by the Fermi Large Area Telescope have γ-ray luminosities scaling with spin-down power E as L_γ ≃ (E x 10³³ erg s^-1)^1/3. However, there exist one detection and several upper limits an order of magnitude or more fainter than this trend. We describe these "sub-luminous" γ-ray pulsars and discuss the case for this being an orientation effect. Of the 12 known young radio pulsars with E > 10³⁴ erg s^-1 and d ≤ 2 kpc several are substantially sub-luminous. The limited available geometrical constraints favor aligned geometries for these pulsars, although no one case for alignment is compelling. In this scenario GeV emission detected from such sub-luminous pulsars can be due to a lower altitude, lower-power accelerator gap.

Affiliations:

Australie, France, États-Unis

Links toward previous steps (curation, corpus...)

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to stream Main, to step Curation: 006735

Le document en format XML

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<front><div type="abstract" xml:lang="en">Most pulsars observed by the Fermi Large Area Telescope have γ-ray luminosities scaling with spin-down power E as L<sub>γ</sub>
 ≃ (E x 10<sup>33</sup>
 erg s<sup>-1</sup>
)<sup>1/3</sup>
. However, there exist one detection and several upper limits an order of magnitude or more fainter than this trend. We describe these "sub-luminous" γ-ray pulsars and discuss the case for this being an orientation effect. Of the 12 known young radio pulsars with E > 10<sup>34</sup>
 erg s<sup>-1</sup>
 and d ≤ 2 kpc several are substantially sub-luminous. The limited available geometrical constraints favor aligned geometries for these pulsars, although no one case for alignment is compelling. In this scenario GeV emission detected from such sub-luminous pulsars can be due to a lower altitude, lower-power accelerator gap.</div>
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Serveur d'exploration sur les relations entre la France et l'Australie

SUB-LUMINOUS y-RAY PULSARS

SUB-LUMINOUS y-RAY PULSARS

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri