Alice Harding
NASA Goddard Space Flight Center (GSFC) (Greenbelt, Maryland, Etats-Unis d'Amérique)
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
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| « Millisecond Pulsars: High-Energy Zombies » |
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Alice Harding |
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The population of rotation-powered pulsars spinning at periods as short as 1.5 ms has been rapidly growing in the past few years. Millisecond pulsars are very old neutron stars that were spinning more slowly in their youth, but have been rescued from the graveyard by accretion from a binary companion. Now in their second lives, they shine brightly in gamma rays. The Fermi Gamma-Ray Space Telescope has discovered more than 60 new millisecond pulsars, many of which are “black widows” destroying their companion stars with their powerful winds. I will discuss some of the many interesting features of these sources, including their gamma-ray emission properties, their potential uses in measuring the neutron star equation–of-state with the Neutron Star Interior Composition ExploreR, in detecting gravitational waves with pulsar timing arrays, and as possible sources of Galactic primary cosmic-ray positrons.
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vendredi 21 novembre 2014 - 11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |