Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-03-02
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
39 pages, 5 figures, 3 tables. To be published in Astrophysical Journal
Scientific paper
Using archival as well as freshly acquired data, we assess the X-ray behaviour of the Fermi/LAT gamma-ray pulsars listed in the First Fermi source catalog. After revisiting the relationships between the pulsars' rotational energy losses and their X and gamma-ray luminosities, we focus on the distance-indipendent gamma to X-ray flux ratios. When plotting our Fgamma/Fx values as a function of the pulsars' rotational energy losses, one immediately sees that pulsars with similar energetics have Fgamma/Fx spanning 3 decades. Such spread, most probably stemming from vastly different geometrical configurations of the X and gamma-ray emitting regions, defies any straightforward interpretation of the plot. Indeed, while energetic pulsars do have low Fgamma/Fx values, little can be said for the bulk of the Fermi neutron stars. Dividing our pulsar sample into radio-loud and radio-quiet subsamples, we find that, on average, radio-quiet pulsars do have higher values of Fgamma/Fx, implying an intrinsec faintness of their X-ray emission and/or a different geometrical configuration. Moreover, despite the large spread mentioned above, statistical tests show a lower scatter in the radio-quiet dataset with respect to the radio-loud one, pointing to a somewhat more constrained geometry for the radio-quiet objects with respect to the radio-loud ones.
Caraveo Patrizia A.
de Luca Andrea
Marelli Martino
No associations
LandOfFree
A multiwavelength study on the high-energy behaviour of Fermi/LAT pulsars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A multiwavelength study on the high-energy behaviour of Fermi/LAT pulsars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A multiwavelength study on the high-energy behaviour of Fermi/LAT pulsars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-588230