出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：PSR J2043+2740 was first detected in gamma rays with the Fermi gamma-ray Space Telescope, in the first 6 months of the mission. It is one of the oldest, non-recycled gamma-ray pulsars known, and thus it gives us an insight into pulsars’ ability to emit gamma rays as they age. We present gamma-ray data from 14 months of Fermi observations of PSR J2043+2740, which we have combined with recent radio-polarisation data and gamma-ray modelling to constrain the pulsar’s emission geometry. Moreover, we have taken advantage of the large characteristic age of this pulsar to extend the studies of gamma-ray efficiency as a function of pulsar age. The efficiency of PSR J2043+2740 appears surprisingly low compared to pulsars of similar characteristic ages; we argue that this perhaps hints at a much smaller true age than the characteristic one. Last but not least, we discuss the possibility that PSR J2043+2740 is associated with the nearby Cygnus Loop and present the supporting and opposing evidence borne from our data analysis.
