Zobrazeno 1 - 10
of 207
pro vyhledávání: '"R. Pallavicini"'
Autor:
P. J. MacNeice, Ester Antonucci, G. M. Simnett, Helen E. Mason, Brian R. Dennis, C. Jordan, R. A. Shine, David M. Rust, R. Pallavicini
We describe and analyse observations of an M1.4 flare which began at 17: 00 UT on 12 November, 1980. Ground based Hα and magnetogram data have been combined with EUV, soft and hard X-ray observations made with instruments on-board the Solar Maximum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d7be63df1321f5108187c7df67bf2c0
https://doi.org/10.1007/bf00157307
https://doi.org/10.1007/bf00157307
Publikováno v:
Advances in Space Research. 32:1181-1186
We have carried out a new gas-dynamic simulation of the physical processes occurring in a fixed amount of plasma confined in coronal loops heated in the top. We chose the solution which explains both the time behaviour of the temperature and the ener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58b539992ed083040d42568046b03f5e
https://doi.org/10.1016/s0273-1177(03)00326-0
https://doi.org/10.1016/s0273-1177(03)00326-0
Autor:
Dainis Dravins, Monique Spite, T. Ayres, B. Barbuy, L. Cram, D. Kiselman, J. Landstreet, R. Pallavicini, H. Saio, C. Sneden, K. Stępień, K. Werner
Publikováno v:
Transactions of the International Astronomical Union. 25:242-245
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de0b9e71963429544fd56de404346aac
https://doi.org/10.1017/s0251107x00001498
https://doi.org/10.1017/s0251107x00001498
Publikováno v:
Scopus-Elsevier
We present two X-ray observations of the RS CVn binary system UX Arietis performed with BeppoSAX in August 1997 and August 1998. A large flare lasting for about 1 day was detected during the rst observation, while the star was quiescent during the se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1586818ac1228490a877d32422fc4edb
https://doi.org/10.1051/0004-6361:20010830
https://doi.org/10.1051/0004-6361:20010830
Publikováno v:
Scopus-Elsevier
We present lithium abundances for ~50 X-ray selected candidate members of the 30-50 Myr old open clusters IC 2602 and IC 2391. These data enlarge and extend to cooler temperatures previous Li surveys of these clusters by Stauffer et al. (1989) and Ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42720d10b50970a91eb917f26edb66c6
https://doi.org/10.1051/0004-6361:20010339
https://doi.org/10.1051/0004-6361:20010339
Autor:
R. Pallavicini, D. Dravins, B. Barbuy, L. Cram, I. Hubeny, S. Owocki, H. Saio, D. Sasselov, M. Spite, K. Stepien, R. Wehrse
Publikováno v:
Transactions of the International Astronomical Union. 24:219-230
Consistently with a trend observed in recent past triennial reports, progress in the theory of stellar atmospheres continues to be made in two different directions: 1) the traditional areas of continuum and line radiation transfer, line blanketing, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0b13cd5a3eb6e0051d7d27d9475c5f8
https://doi.org/10.1017/s0251107x00002935
https://doi.org/10.1017/s0251107x00002935
Autor:
R. Pallavicini
Publikováno v:
Advances in Space Research. 26:1713-1722
I review recent results on coronal activity in late-type stars stressing the similarities and differences with respect to solar coronal activity. The emphasis is on recent stellar observations by ROSAT, ASCA and SAX and on prospects for future observ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8b0fff7489b384367486408cb3bfffc
https://doi.org/10.1016/s0273-1177(01)00014-x
https://doi.org/10.1016/s0273-1177(01)00014-x
Publikováno v:
Scopus-Elsevier
We present the results of high-precision photometric observations and of spectroscopic radial velocity measurements obtained at the European Southern Observatory for a sample of 51 cool stars detected in the EUV by the ROSAT Wide Field Camera (WFC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9b2917a73cbdafcb7476bb72ed144e9
https://doi.org/10.1051/aas:1999497
https://doi.org/10.1051/aas:1999497
Autor:
R. Pallavicini
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 69:56-61
In present an overview of the Beppo SAX program in the field of optically thin plasmas, which comprises stellar coronae, supernova remnants and clusters of galaxies. Albeit only ∼ 70% of the observations approved in AO1 have been carried out, and o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4800549cfaadcfe3547eaf7d174aff2a
https://doi.org/10.1016/s0920-5632(98)00184-4
https://doi.org/10.1016/s0920-5632(98)00184-4
Autor:
G. Tagliaferri, R. Pallavicini
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 69:29-32
We present preliminary results of a BeppoSAX observation of the active binary star UX Arietis. We report the first detection in a star other the Sun of hard (> 20 keV) X-ray emission during a large flare. Similar results were obtained a few days late
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed890c4e96b0caedba43de01e6fa58a9
https://doi.org/10.1016/s0920-5632(98)00177-7
https://doi.org/10.1016/s0920-5632(98)00177-7