X‐Ray Astronomy 2000

Salvatore Serio, Luigi Stella
2001 Publications of the Astronomical Society of the Pacific  
The international conference "X-Ray Astronomy 2000" was held in Mondello (Palermo, Italy) on 2000 September 4-8, organized by the Osservatorio Astronomico di Palermo "G. S. Vaiana" as part of the celebration for the bicentennial of the discovery of the first asteroid, Ceres. The meeting was centered on recent advances in X-ray astronomy, especially those obtained by the Chandra and XMM-Newton space observatories, and addressed an ample range of problems from solar and stellar coronae to the
more » ... sion from the farthest objects in the universe. Stellar coronae were examined by a number of speakers, focusing on recent high-resolution X-ray spectroscopic studies of nearby and/or active stars and the insight that can be gained regarding the physics of stellar coronae by comparing the new results with observations of the solar corona. Similarities and differences between solar and stellar coronae were also discussed in the light of recent observations of stellar flares. These indicate the presence of nearly polar active regions, at odds with the solar case. Coeval stellar samples, such as those in Galactic open clusters, are very useful to understand the physical mechanisms responsible for coronal X-ray emission. Chandra results on the Pleiades and NGC 2516 young open clusters were presented and discussed in relation to the issue of the effect of stellar metallicity on the coronal emission level. The Chandra observations of the Orion star-forming region gave a striking example of the superb imaging capabilities of Chandra. These stars show widespread variability of X-ray emission in the half-hour to 1 day range. X-ray emission from supernova remnants (SNRs) was reviewed with special emphasis on ROSAT and ASCA results and on recent Chandra and XMM-Newton observations of SNRs in the Galaxy and the Large Magellanic Cloud. Especially important are the results from the Chandra mediumand high-resolution observations of Cas A, which clearly revealed spatial structures down to tens of arcseconds,
doi:10.1086/322913 fatcat:bjx2m2dnwfgpnpnhplmbr3omoy