Fermi-LAT Search for Pulsar Wind Nebulae around gamma-ray Pulsars
COGNARD, Ismaël
Laboratoire de physique et chimie de l'environnement [LPCE]
Unité Scientifique de la Station de Nançay [USN]
Laboratoire de physique et chimie de l'environnement [LPCE]
Unité Scientifique de la Station de Nançay [USN]
THEUREAU, G.
Laboratoire de physique et chimie de l'environnement [LPCE]
Unité Scientifique de la Station de Nançay [USN]
< Réduire
Laboratoire de physique et chimie de l'environnement [LPCE]
Unité Scientifique de la Station de Nançay [USN]
Langue
en
Article de revue
Ce document a été publié dans
The Astrophysical Journal. 2011-01, vol. 726, p. 35
American Astronomical Society
Résumé en anglais
The high sensitivity of the Fermi-LAT (Large Area Telescope) offers the first opportunity to study faint and extended GeV sources such as pulsar wind nebulae (PWNe). After one year of observation the LAT detected and ...Lire la suite >
The high sensitivity of the Fermi-LAT (Large Area Telescope) offers the first opportunity to study faint and extended GeV sources such as pulsar wind nebulae (PWNe). After one year of observation the LAT detected and identified three pulsar wind nebulae: the Crab Nebula, Vela-X and the PWN inside MSH 15-52. In the meantime, the list of LAT detected pulsars increased steadily. These pulsars are characterized by high energy loss rates from ~3 \times 10^{33} erg s$^{-1}$ to 5 \times 10$^{38}$ erg s$^{-1}$ and are therefore likely to power a PWN. This paper summarizes the search for PWNe in the off-pulse windows of 54 LAT-detected pulsars using 16 months of survey observations. Ten sources show significant emission, seven of these likely being of magnetospheric origin. The detection of significant emission in the off-pulse interval offers new constraints on the gamma-ray emitting regions in pulsar magnetospheres. The three other sources with significant emission are the Crab Nebula, Vela-X and a new pulsar wind nebula candidate associated with the LAT pulsar PSR J1023-5746, coincident with the TeV source HESS J1023-575. We further explore the association between the H.E.S.S. and the Fermi source by modeling its spectral energy distribution. Flux upper limits derived for the 44 remaining sources are used to provide new constraints on famous PWNe that have been detected at keV and/or TeV energies.< Réduire
Mots clés en anglais
pulsars: general
catalogs
gamma rays: general
Origine
Importé de halUnités de recherche