Zobrazeno 1 - 10
of 32
pro vyhledávání: '"B. Stenholm"'
Autor:
G. M. Stirpe, M. Dietrich, A. Bragaglia, F. Elizalde, D. Alloin, E. Giannuzzo, G. Carranza, Horacio Alberto Dottori, Alberto Rodríguez-Ardila, C. Zanin, P. Stein, I. Rodrigues de Oliveira Filho, R. Wilhelm, G. Goldes, C. Winge, Jane Gregorio-Hetem, P. M. Rodríguez-Pascual, J. Calderón, B. Stenholm, S. Paolantonio, César A. Caretta, R. E. de Souza, Ruben Diaz, J.-F. Claeskens, G. Mathys, M. Santos-Lleo, Christopher N. A. Willmer, P. Albrecht, M. Federspiel, K. K. Ghosh, I. Salamanca, Henrique R. Schmitt, Timothy C. Beers, S. Soundararajaperumal, W. Zheng, E. Chatzichristou, Bradley M. Peterson, C. Mendes de Oliveira, M. A. G. Maia, R. D. D. da Costa
Publikováno v:
The Astrophysical Journal Supplement Series. 112:271-283
The results of an optical monitoring campaign on the active nucleus in the luminous Seyfert 1 galaxy Fairall 9 are presented. This campaign was undertaken in parallel with ultraviolet spectroscopic moni- toring with the IUE satellite which is describ
Autor:
K. A. van der Hucht, B. Stenholm, A. F. J. Moffat, Ingemar Lundström, E.P.J. van den Heuvel, Sergey V. Marchenko, Wilhelm Seggewiss, J. P. de Cuyper, AE Gomez, D.Y.A. Setia Gunawan, W. Sutantyo, H. Schrijver
Publikováno v:
New Asstronomy, 2, 245-250. Elsevier
Hipparcos parallax measurements give a distance to the Wolf-Rayet WC8 + O spectroscopic binary gamma(2) Vel of d = 258(-31)(+41) pc and a distance to the O4I(n)f star zeta Pup of d = 429(-77)(+120) pc. Adopting for gamma(2) Vel an interstellar extinc
Publikováno v:
Astrophysics and Space Science. 238:63-66
Publikováno v:
Annales de Physique. 16:361-374
The position of the central stars of planetary nebulae on the T/L diagram provides an important test of the stellar evolution theory. In this paper, we present, at first, a brief review of the recent works presented on this subject. The confrontation
Publikováno v:
Planetary Nebulae ISBN: 9780792348931
We have carried out spectral classification of 65 [WC] stars, using spectra obtained at ESO in 1994 -1995 with a spectral resolution of 1500 and high signal to noise ratio. We quantify the visual classification, by using the line ratios of CIII, CIV,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::502c8e80a17becbbc7de6a8029bb8f73
https://doi.org/10.1007/978-94-011-5244-0_3
https://doi.org/10.1007/978-94-011-5244-0_3
Publikováno v:
Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution ISBN: 9780792331841
A number of central stars of planetary nebulae (CSPN) show emission lines in their spectra. Among them about 50 have been classified as [Wolf-Rayet] type (Tylenda et al. 1993). In spite of the fact that these stars probably have masses below 1 M∩ a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4bd17aa19b92c75bdb23ca86fb131e9
https://doi.org/10.1007/978-94-011-0205-6_25
https://doi.org/10.1007/978-94-011-0205-6_25
Publikováno v:
Planetary Nebulae ISBN: 9780792324409
Determination of the positions of central stars of planetary nebulae in the HR-diagram requires the knowledge of nebular distances. For almost all nebulae, these can only be given in terms of statistical scales. These scales have in common that they
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::767bcaa8b52b74950b37c0389f790d60
https://doi.org/10.1007/978-94-011-2088-3_46
https://doi.org/10.1007/978-94-011-2088-3_46
Autor:
B. Stenholm
Publikováno v:
Planetary Nebulae ISBN: 9780792324409
In this review lecture the increase of fundamental data for planetary nebulae is shortly reflected. Special attention is given to the new general catalogue of galactic planetary nebulae, and selection criteria for the entries are summarised. Some inf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aed5ed45ecba9cd07563154403462458
https://doi.org/10.1007/978-94-011-2088-3_2
https://doi.org/10.1007/978-94-011-2088-3_2
Publikováno v:
Planetary Nebulae ISBN: 9780792324409
We have compared the extinction of planetary nebulae (PN) as derived from the Balmer decrement and from the ratio of radio to Hs fluxes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85a5d4d56f010776a8207fecbc3c314e
https://doi.org/10.1007/978-94-011-2088-3_49
https://doi.org/10.1007/978-94-011-2088-3_49
Publikováno v:
The Stellar Populations of Galaxies ISBN: 9780792316992
The chemical composition of 86 planetary nebulae from the Strasbourg-ESO survey are analysed (Acker et al., 1989; Koppen et al., 1991). Strong correlations between O, S, Ar, as well as between N and N/O are found. Galactic radial gradients for the ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::597aca0b0fcbf027efec23efba8850bd
https://doi.org/10.1007/978-94-011-2434-8_50
https://doi.org/10.1007/978-94-011-2434-8_50