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Universe Webinar | Superfluidity and Superconductivity in Neutron Stars

28 Jan 2022, 10:00 (CET)

Neutron Star, Pulsar, Gravitation, General Relativity, Gravitational Waves, Superfluidity, Superconductivity, Dense Matter, Asteroseismology
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Welcome from the Chairs

5th Universe Webinar

Superfluidity and Superconductivity in Neutron Stars

Welcome to the webinar, “Superfluidity and Superconductivity in Neutron Stars”.

Born in the aftermath of gravitational core-collapse supernova explosions, neutron stars have masses comparable to that of our Sun but with a radius of only about 12 kilometers. With densities exceeding that found inside the heaviest atomic nuclei, neutron stars are unique laboratories for exploring novel phases of matter under conditions so extreme that they cannot be reproduced on Earth.

In particular, neutron stars are the only celestial bodies expected to be superfluids and superconducting. Although quantum condensates have been extensively studied in the laboratory, the properties of their stellar counterpart remain largely unknown. This stems from the tremendous gravitational pressure that matter is subjected to in a neutron star. According to theoretical calculations, various kinds of superfluid and superconducting phases may exist in different regions of the star.

One of the difficulties in modeling the global dynamics of a neutron star lies in the widely different scales involved: a neutron star (whose radius is about 10 kilometers) is thought to be threaded by quantized vortices with tiny cores of about 10–100 fermis. To add to the challenge, a neutron star is so compact (having a mass between once and twice that of the Sun) that it must be ultimately described by Einstein’s theory of general relativity.

This webinar will provide an overview on our current understanding of superfluidity and superconductivity in neutron stars and what can be learned from astrophysical observations focusing on neutron-star cooling, pulsar glitches, and neutron-star asteroseismology.

We look forward to seeing many of you!

My best regards,

Nicolas Chamel

Date: 28 January 2022

Time: 10:00am CET | 4:00am EST | 5:00pm CST Asia

Webinar ID: 864 1105 3834

Webinar Secretariat: universe.webinar@mdpi.com

Chair

Institute of Astronomy and Astrophysics, Physics Department, Université Libre de Bruxelles, Belgium

DETAILS
Bio
Prof. Nicolas Chamel earned his PhD from the University Pierre and Marie Curie in Paris, France (now Sorbonne University). He is now a senior research associate at the Institute of Astronomy and Astrophysics of Université Libre de Bruxelles in Belgium. His main research activities deal with the properties of matter under the extreme conditions prevailing in the interior of neutron stars and their role in astrophysical phenomena.

Invited Speakers

Department of Theoretical Astrophysics, Ioffe Institute, Russia

DETAILS
Bio
Dr. Peter Shternin received a PhD degree in physical and math sciences from the Ioffe Institute in 2008. Now he is working as a senior research scientist at the Department of Theoretical Astrophysics of the Ioffe Institute. His main research focuses on the neutron star astrophysics, particularly of the transport theory of the superdense matter of neutron star interiors and neutron star cooling.

Mathematical Sciences, University of Southampton, United Kingdom

DETAILS
Bio
Nils Andersson is Professor of Applied Mathematics at the University of Southampton. He is an expert on Einstein's theory of relativity and related astrophysics and is the current President of the International Society of General Relativity and Gravitation. His research mainly concerns black holes, neutron stars and gravitational waves. He has written a comprehensive textbook on gravitational-wave astronomy as well as a series of children’s books introducing science concepts to younger readers. Over the last couple of decades, he has actively pursued many issued relevant to the emerging area of gravitational-wave astronomy. His current work focusses on the extreme physics that neutron stars represent, from the state and composition of matter to the dynamical role of the superfluid and superconducting components expected to be present in the core of a mature neutron star.

Nicolaus Copernicus of the Polish Academy of Sciences, Warsaw, Poland

DETAILS
Bio
Dr. Brynmor Haskell received his PhD from the University of Southampton, and then held various fellowships and research positions in the UK, the Netherlands, Germany and Australia before becoming a staff member at the Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences in Warsaw, where he is currently an Associate Professor. He leads a research group that focuses on several aspects of neutron star physics, from theory to observation, with a particular focus on modelling pulsar glitches and gravitational wave emission.

Webinar Content

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Program

Speaker/Presentation

Time in CET

Chair Prof. Dr. Nicolas Chamel

Overview on Superfluidity and Superconductivity in Neutron Stars

10:00 - 10:30 am

Dr. Peter Shternin

Neutron Star Cooling

10:30 - 11:00 am

Prof. Dr. Nils Andersson

Neutron Star Asteroseismology

11:00 - 11:30 am

Dr. Brynmore Haskell

Pulsar Glitches

11:30 am - 12:00 pm

Chair Prof. Dr. Nicolas Chamel

Closing

12:00 - 12:15 pm

Relevant SI

Superfluidity and Superconductivity in Neutron Stars
Guest Editor: Prof. Dr. Nicolas Chamel
Deadline for manuscript submissions: 15 February 2022

Sponsors and Partners

Organizers

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