Sep 26 – 28, 2018
Department of Physics (University of Coimbra)
Europe/Lisbon timezone

Glitches as an indirect probe for the internal physics of pulsars

Sep 27, 2018, 9:30 AM
20m
Room E10A

Room E10A

Speaker

Marco Antonelli (Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences)

Description

Issues involving nuclear superfluidity are thought to play key roles for neutron star phenomenology. Pulsar glitches (sudden jumps in the period of otherwise steadily spinning down pulsars) offer a glimpse into the superfluid interior of a neutron star: within the currently accepted scenario these timing irregularities are explained in terms of an expulsion of the quantized vortex lines that permeate the superfluid region. Vortex pinning to ions in the crust can provide the mechanism for storing the angular momentum which can be eventually released during a glitch. A consistent model for the angular momentum reservoir of pinned vorticity gives a general and quantitative inverse relation between size of the maximum glitch and the pulsar mass, allowing to put some limits on the mass of a pulsar.

Primary author

Marco Antonelli (Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences)

Co-authors

Mr Alessandro Montoli (Università degli Studi di Milano & INFN) Brynmor Haskell (The University of Melbourne) pierre pizzochero (università di milano)

Presentation materials