Servizi
Amministrazione
Link Esterni
Eventi
25 OTTOBRE 2016 ore 11:00
Oggi Astro Chiacchiere!
Detecting Gravitational Waves with Pulsars: the LEAP project
Delphine Perrodin (OA-Cagliari)
Abstract
A background of nanohertz gravitational waves from supermassive black hole binaries could soon be detected by pulsar timing arrays, which measure the times-of-arrival of radio pulses from millisecond pulsars with very high precision. The European Pulsar Timing Array uses five large European radio telescopes to monitor high-precision millisecond pulsars, imposing in this way strong constraints on a gravitational wave background. To achieve the necessary precision needed to detect gravitational waves, the Large European Array for Pulsars (LEAP) performs simultaneous observations of pulsars with all five telescopes, which allows us to coherently add the radio pulses, maximize the signal-to-noise of pulsar signals and increase the precision of times-of-arrival. We report on the progress made by the LEAP collaboration, and in particular on the addition of the Sardinia Radio Telescope to LEAP observations. In addition, we discuss how LEAP can be used to monitor strong-gravity systems such as double neutron star systems and impose strong constraints on post-keplerian parameters.
-------------------------------------------------------------------------------------------------------
Oggi Astro Chiacchiere! è un incontro informale, a cadenza bisettimanale, tra il personale dell'Osservatorio Astronomico di Cagliari (staff, postdoc e studenti), che ha lo scopo di discutere argomenti di carattere prevalentemente scientifico, tecnologico e informatico. L'incontro si tiene solitamente il Martedì, alle ore 11, nell'Auditorium dell'Osservatorio Astronomico di Cagliari.
A background of nanohertz gravitational waves from supermassive black hole binaries could soon be detected by pulsar timing arrays, which measure the times-of-arrival of radio pulses from millisecond pulsars with very high precision. The European Pulsar Timing Array uses five large European radio telescopes to monitor high-precision millisecond pulsars, imposing in this way strong constraints on a gravitational wave background. To achieve the necessary precision needed to detect gravitational waves, the Large European Array for Pulsars (LEAP) performs simultaneous observations of pulsars with all five telescopes, which allows us to coherently add the radio pulses, maximize the signal-to-noise of pulsar signals and increase the precision of times-of-arrival. We report on the progress made by the LEAP collaboration, and in particular on the addition of the Sardinia Radio Telescope to LEAP observations. In addition, we discuss how LEAP can be used to monitor strong-gravity systems such as double neutron star systems and impose strong constraints on post-keplerian parameters.
-------------------------------------------------------------------------------------------------------
Oggi Astro Chiacchiere! è un incontro informale, a cadenza bisettimanale, tra il personale dell'Osservatorio Astronomico di Cagliari (staff, postdoc e studenti), che ha lo scopo di discutere argomenti di carattere prevalentemente scientifico, tecnologico e informatico. L'incontro si tiene solitamente il Martedì, alle ore 11, nell'Auditorium dell'Osservatorio Astronomico di Cagliari.
Per informazioni e/o contributi contattare pcastang@oa-cagliari.inaf.it