The X-ray Mysteries of Neutron Stars and White Dwarfs

5-7 June 2024

European Space Astronomy Centre (ESAC)
Villafranca del Castillo
Madrid, Spain



The X-ray emission from neutron stars and white dwarfs has been a subject of extensive research, unveiling unique insights into the high-energy phenomena occurring within these compact stellar remnants. In this meeting, we gather experts from various disciplines to delve into the latest advancements in understanding the X-ray emission processes, its origin, and the astrophysical implications associated with neutron stars and white dwarfs.

We will explore the diverse X-ray emission mechanisms, ranging from thermal emission due to accretion processes, magnetic fields, and nuclear reactions, to non-thermal emission originating from particle acceleration and magnetic reconnection events. These mechanisms provide crucial insights into the physical conditions and dynamics present in the extreme environments surrounding neutron stars and white dwarfs.

The X-ray spectra and timing properties will be discussed in detail, enabling a deeper understanding of the underlying emission mechanisms and the associated astrophysical phenomena. Spectral analysis techniques will shed light on the composition, temperature distribution, and physical parameters of the emitting regions. Furthermore, timing studies will reveal periodic and aperiodic variability, aiding in the characterization of rotational dynamics, accretion phenomena, and potential gravitational wave signatures.

In addition, we will explore the role of X-ray emission in the context of binary systems, investigating the interactions between compact objects and their stellar companions. X-ray binaries, including pulsars and cataclysmic variables, provide unique opportunities to study the accretion processes and the influence of intense magnetic fields on the X-ray emission.

Finally, we will discuss the implications of X-ray studies for our broader understanding of astrophysics. The X-ray emission from neutron stars and white dwarfs offers invaluable insights into compact object formation, stellar evolution, and the interplay between magnetic fields, radiation, and matter in extreme conditions. Synergies with radio, infrared, optical, gamma-rays and multi-messenger studies will be looked at, fostering interdisciplinary discussions and collaborations, encouraging the exchange of ideas. By collectively unraveling the high-energy mysteries, we strive to advance our understanding of these enigmatic stellar remnants and their impact on the cosmos as a whole.