Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-29T10:27:52.916Z Has data issue: false hasContentIssue false
  • English
  • Français

X-Ray Coronae from Stars

Published online by Cambridge University Press:  25 May 2016

R. Pallavicini
R. Pallavicini*
Affiliation:
Osservatorio Astronomico di Palermo Palazzo dei Normanni, 90134 Palermo, Italy

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A number of major advances in stellar coronal physics have occurred since 1990 mainly as a consequence of imaging observations by ROSAT and spectroscopic observations by ASCA. These can be summarised as follows:

  1. 1. an all-sky survey has been performed by ROSAT at a sensitivity of ~ 2 × 10−13 erg cm−2 s−1, complemented by pointed observations an order of magnitude deeper;

  2. 2. complete mapping and deeper pointings have been obtained for virtually all open clusters closer than ~ 500 pc, and covering the age range from ~ 30 Myr to ~ 700 Myr;

  3. 3. complete mapping and deeper paintings have been obtained for several Star Forming Regions (SFRs) covering the age range ~ 1 to ~ 10 Myr;

  4. 4. spectroscopic observations of bright coronal sources have been obtained with EUVE and ASCA allowing the derivation of the temperature structure and elemental abundances.

Type
Session 1: Plasma and Fresh Nucleosynthesis Phenomena
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 13 - 16
Copyright
Copyright © Kluwer 1998 

References

Favata, F., Mewe, R., Brickhouse, N.S., Pallavicini, R., Micela, G., 1997, A&A 324, L37 Google Scholar
Jeffries, R.D., Thrurston, M.R., Pye, J.P., 1997, MNRAS, in press Google Scholar
Koyama, K., Hamaguchi, K., Ueno, S., Kobayashi, N., Feigelson, E.D., 1996, PASJ 48, L87 Google Scholar
Maggio, A., Favata, F., Peres, G., Sciortino, S., Rosner, R., 1997, A&A, in press Google Scholar
Mewe, R., Kaastra, J.S., White, S.M., Pallavicini, R., 1996, A&A 315, 170 Google Scholar
Ortolani, A., Maggio, A., Pallavicini, R., Sciortino, S., Drake, J.J., Drake, S.A., 1987, A&A 325, 664 Google Scholar
Randich, S., 1997, in Micela, G., Pallavicini, R. and Sciortino, S. (eds.), Cool Stars in Clusters and Associations: Magnetic Activity and Age Indicators , in press Google Scholar
Randich, S., Giampapa, M.S., Pallavicini, R., 1994, A&A 283, 893 Google Scholar
Randich, S., Schmitt, J.H.M.M., 1995, A&A 298, 115 Google Scholar
Randich, S., Schmitt, J.M.M.M., Prosser, C.F., Stauffer, J.R., 1996, A&A 305, 785 Google Scholar
Tagliaferri, G., Covino, S., Fleming, T.A., Gagné, M., Pallavicini, R., Haardt, F., Uchida, Y., 1997, A&A 321, 850 Google Scholar
White, N.E., 1996, in Pallavicini, R. and Dupree, A.K. (eds.), Ninth Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun , ASP Conference Series 109, 193 Google Scholar