Sub-luminous γ-ray pulsars
- Stanford Univ., Stanford, CA (United States)
- Australia Telescope National Facility, Epping, NSW (Australia)
- Lab. de Physique et Chimie de l'Environnement, Orleans Cedex (France); Observatoire de Paris, Nancay (France)
- Univ. Bordeaux, Gradignan (France)
Here, most pulsars observed by the Fermi Large Area Telescope have γ-ray luminosities scaling with spin-down power $${\dot{E}}$$ as $$L_\gamma \approx ({\dot{E}}\, \times \, 10^{33}\,{\rm erg \,s^{-1}})^{1/2}$$. 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 $${\dot{E}}>10^{34}\, {\rm erg\,s^{-1}}$$ 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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1357201
- Journal Information:
- The Astrophysical Journal, Vol. 738, Issue 1; ISSN 0004-637X
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
THE SECOND FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS
|
journal | September 2013 |
Searching a Thousand Radio Pulsars for Gamma-Ray Emission
|
journal | January 2019 |
The Second Fermi Large area Telescope Catalog of Gamma-Ray Pulsars
|
text | January 2013 |
Searching a Thousand Radio Pulsars for Gamma-ray Emission | text | January 2018 |
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