Zobrazeno 1 - 10
of 21
pro vyhledávání: '"P. L. Selvelli"'
Publikováno v:
Astronomy & Astrophysics. 381:507-516
In our investigation of the region of formation of the Fe II emission lines in RR Tel, we have applied the SAC method to the optical Fe II emission line fluxes measured by Crawford et al. (1999). It is possible to determine physical parameters of the
Publikováno v:
Physics of Classical Novae ISBN: 9783540535003
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c49a490c636a744735f3d359ae320c9d
https://doi.org/10.1007/3-540-53500-4_101
https://doi.org/10.1007/3-540-53500-4_101
Publikováno v:
Cataclysmic Variables and Related Objects ISBN: 9789401066327
Spectra of the old nova V603 Aql taken with the HST-GHRS did not reveal resonance doublet absorption components arising in material ejected in the 1918 outburst. However absorption components, probably produced by a disk wind, were observed, though m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b9b39d33f2a9a96f637f2f07aee0491
https://doi.org/10.1007/978-94-009-0325-8_99
https://doi.org/10.1007/978-94-009-0325-8_99
Publikováno v:
Cataclysmic Variables ISBN: 9789401041485
Recurrent novae, where we know in advance that an outburst will occur, provide a unique opportunity to study the pre-outburst behavior in the nova phenomenon. T Pyx is particularly well suited for this purpose because the last outburst was recorded i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30da5e33a0e903a0b0e382303c2b0050
https://doi.org/10.1007/978-94-011-0335-0_63
https://doi.org/10.1007/978-94-011-0335-0_63
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401043410
We report here the results of a UV monitoring programme of the recurrent nova T Pyx that spans the time interval from May 1980 to February 1993. The IUE spectra at the various epochs show a remarkable constancy in the continuum intensity and slope bu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d00a9c594346a704b12fec9693df8d5
https://doi.org/10.1007/978-94-011-0794-5_82
https://doi.org/10.1007/978-94-011-0794-5_82
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401048514
CH Cyg is a long period, P=15.6 yr, eclipsing symbiotic binary which contains an SR variable M6.5-7.2 III and a white dwarf probably with strong magnetic field (Mikolajewski et al., 1990a,b). Intensive and unstable accretion of the M giant wind onto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c6ab90cfdf8da5121f4fd385a0c1f54
https://doi.org/10.1007/978-94-011-1924-5_28
https://doi.org/10.1007/978-94-011-1924-5_28
Publikováno v:
International Astronomical Union Colloquium. 158:329-330
Spectra of the old nova V603 Aql taken with the HST-GHRS did not reveal resonance doublet absorption components arising in material ejected in the 1918 outburst. However absorption components, probably produced by a disk wind, were observed, though m
Publikováno v:
Astrophysics and Space Science. 131:725-732
Variations of the UV continuum have been analyzed. The observed UV continuum may be reproduced by a superposition of a Kurucz model atmosphere (log g=2), Teff~ 8500 - 15000 K) and optically thin hydrogen bound-free and free-free emission (Te~ 1000 K)
Autor:
A. J. Willis, Jesse L. Greenstein, D. J. Stickland, Warren M. Sparks, J. B. Hutchings, D. West, R. Viotti, C. C. Wu, J. A. J. Whelan, Ab Underhill, F. Macchetto, P. L. Selvelli, Albert Boggess, A. Boksenberg, R. Wilson, A. V. Holm, D. A. Klinglesmith, Sara R. Heap
Publikováno v:
Nature. 275:385-388
During the commissioning phase of IUE observations were made of a selection of hot stars: the white dwarf HZ43, the hot subdwarf BD + 75°325, the nucleus of the planetary nebula NGC6826, the dwarf nova SS Cygni, and the peculiar object η Carinae. T
Autor:
A. Holm, A. Boksenberg, Jeffrey L. Linsky, D. A. Klinglesmith, D. C. Evans, Sara R. Heap, Andre Heck, E. Dunford, H. R. Freeman, F. D. Macchetto, M. A. J. Snijders, Albert Boggess, C.-C. Wu, Warren M. Sparks, P. Benvenuti, M. V. Penston, D. West, P. M. Gondhalekar, P. L. Selvelli, Arthur L. Lane, Ci Coleman, A. Cassatella, P. M. Perry, J. Clavel, G. R. Longanecker, R. Wilson, R. C. Bohlin, Mb Oliver, D. J. Stickland, Theodore R. Gull, B. E. Turnrose, F. H. Schiffer, M. C. W. Sandford, Blair D. Savage
Publikováno v:
Nature. 275:377-385
A report on the initial performance of the IUE satellite, launched in January, 1978, is given. Attention is given to optical performance, camera performance, background corrections, photometric performance, and data reduction. Samples of high-dispers