More than 40 years after the discovery of Isolated Neutron Stars, the comprehension of their physics is still rather poor. This thesis is based on a program of multiwavelength observations of pulsars which yielded new and important pieces of information about the overall proprieties of this class of sources. The thesis is organized as follows: - In chapter 1 we give a very brief overview of the current status of the under-standing of Isolated Neutron Stars. We also talk about the Fermi revolution that occurred in the last three years, focusing on the Fermi contribution to the knowledge of neutron stars. Then, we describe the results led by the synergy between X-ray and °-ray bands. - In chapter 2 we give a detailed description of X-ray analyses we did and surprising results we obtained for two different radio-quiet pulsars. Such neutron stars, J0007+7303 and J0357+3205, can be considered ”extreme” in the Fermi pulsars’ zoo due to their energetics and ages. Both the X-ray observations and analyses are very different so that they can be considered as the standing-up examples of all the following analyses. - In chapter 3 we describe the analysis we done in the X-ray band and briefly report the obtained spectra of each pulsar and its nebula, if present. Then, we study the X-ray and °-ray pulsars’ luminosities as a function of their rotational energies and ages in order to find any relationship between these values and any difference between the two populations of radio-quiet and radio-loud pulsars. - In chapter 4 we report the ”identity card” of all Fermi pulsars, the detailed description of the analyses done and results obtained for each pulsar. Finally, in appendix we report our accepted proposals of the most significative X-ray observations used in this thesis plus the article on the X-ray behaviour of Fermi/LAT pulsars we published on the Astrophyisical Journal.

The X-ray behaviour of Fermi/LAT pulsars / Marelli, Martino. - (2011).

The X-ray behaviour of Fermi/LAT pulsars.

Marelli, Martino
2011

Abstract

More than 40 years after the discovery of Isolated Neutron Stars, the comprehension of their physics is still rather poor. This thesis is based on a program of multiwavelength observations of pulsars which yielded new and important pieces of information about the overall proprieties of this class of sources. The thesis is organized as follows: - In chapter 1 we give a very brief overview of the current status of the under-standing of Isolated Neutron Stars. We also talk about the Fermi revolution that occurred in the last three years, focusing on the Fermi contribution to the knowledge of neutron stars. Then, we describe the results led by the synergy between X-ray and °-ray bands. - In chapter 2 we give a detailed description of X-ray analyses we did and surprising results we obtained for two different radio-quiet pulsars. Such neutron stars, J0007+7303 and J0357+3205, can be considered ”extreme” in the Fermi pulsars’ zoo due to their energetics and ages. Both the X-ray observations and analyses are very different so that they can be considered as the standing-up examples of all the following analyses. - In chapter 3 we describe the analysis we done in the X-ray band and briefly report the obtained spectra of each pulsar and its nebula, if present. Then, we study the X-ray and °-ray pulsars’ luminosities as a function of their rotational energies and ages in order to find any relationship between these values and any difference between the two populations of radio-quiet and radio-loud pulsars. - In chapter 4 we report the ”identity card” of all Fermi pulsars, the detailed description of the analyses done and results obtained for each pulsar. Finally, in appendix we report our accepted proposals of the most significative X-ray observations used in this thesis plus the article on the X-ray behaviour of Fermi/LAT pulsars we published on the Astrophyisical Journal.
neutron stars, pulsars, gamma-rays, x-rays
The X-ray behaviour of Fermi/LAT pulsars / Marelli, Martino. - (2011).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11383/2090216
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