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Publication
Featured researches published by Roald Sagdeev.
Advances in Space Research | 1985
Roald Sagdeev; G. A. Avanesov; I. V. Barinov; A.I. Debabov; V.A. Kvasikov; V. I. Moroz; V. A. Shamis; V.I. Tarnapolski; D.A. Usikov; Ya.L. Ziman; B. S. Zhukov; B.A. Smith; Stephen M. Larson; F. Szabo; K. Szegö; A. Kondor; L. Värhalmi; E. Merényi; L. Szabó; I. Toth; P. Cruvellier; A. Abergel; J.-L. Bertaux; J. E. Blamont; M. Danz; D. Möhlmann; H. Stiller; H.P. Zapfe
Abstract The VEGA-1 and VEGA-2 spacecraft made their closest approach to Comet Halley on 6 and 9 March, respectively. In this paper those results of the onboard imaging experiment which were obtained around closest approach are discussed. The nucleus of the comet was clearly identifiable as an irregularly shaped object, with overall dimensions of (16±1)×(8±1)×(8±1) km. The nucleus rotates in the prograde sense about an axis nearly perpendicular to the orbital plane with a period of 53±2 hours. Its albedo is only 0.04± 0.02 0.01 Many of the jet features observed during the second fly-by have been spatially reconstructed. Their sources form a quasi-linear structure on the surface. The dust above the surface is shown to be generally optically thin with the exception of certain specific dust jets. Brightness features on the surface are clearly seen. Correlating our data with other measurements, we conclude that the dirty snow-ball model will probably need to be revised.
Nature | 1986
J. Kissel; Roald Sagdeev; J. L. Bertaux; V. N. Angarov; J. Audouze; J. E. Blamont; K. Büchler; E. N. Evlanov; H. Fechtig; Marina N. Fomenkova; H. von Hoerner; N. A. Inogamov; V. N. Khromov; W. Knabe; F. R. Krueger; Yves Langevin; V. B. Leonas; A. C. Levasseur-Regourd; G. G. Managadze; S. N. Podkolzin; V. D. Shapiro; S. R. Tabaldyev; B. V. Zubkov
Nature | 1986
Roald Sagdeev; F. Szabo; G. A. Avanesov; P. Cruvellier; L. Szabó; K. Szegő; A. Abergel; Akos Balazs; I. V. Barinov; J.-L. Bertaux; J. E. Blamont; M. Detaille; E. Demarelis; G. N. Dul'nev; G. Endröczy; M. Gardos; M. Kanyo; V. I. Kostenko; V. A. Krasikov; T. Nguyen-Trong; Z. Nyitrai; I. Reny; P. Rusznyak; V. A. Shamis; B. Smith; K. G. Sukhanov; Sándor Szalai; Vladimir I. Tarnopolsky; I. Toth; G. I. Tsukanova
Nature | 1986
Roald Sagdeev; J. E. Blamont; A. A. Galeev; V. I. Moroz; V. D. Shapiro; V. I. Shevchenko; K. Szegő
Nature | 1991
L. Mukhin; G. Dolnikov; E. Evlanov; Marina N. Fomenkova; O. Prilutsky; Roald Sagdeev
Nature | 1987
Bradford A. Smith; S. M. Larson; K. Szego; Roald Sagdeev
Archive | 1986
Roald Sagdeev; G. A. Avanesov; Ya. L. Ziman; V. I. Moroz; Vladimir I. Tarnopolsky; B. S. Zhukov; V. A. Shamis; Bradford A. Smith; Imre Péter Tóth
Archive | 1986
Roald Sagdeev; Ya. L. Ziman; A. A. Kuzmin; G. A. Avanesov; V. A. Krasikov; V. A. Shamis; V. A. Tarnopolsky; K. Szego; Erzsébet Merényi; Bradford A. Smith
Archive | 1990
Roald Sagdeev; Viktor Kerzhanovich; L. R. Kogan; V. I. Kostenko; V. M. Linkin; L. I. Matveenko; R. R. Nazirov; S. V. Pogrebenko; I. A. Strukov; R. A. Preston; G. H. Purcell; C. E. Hildebrand; Jacques Blamont; L. Boloh; G. Laurans; Robert E. Spencer; J. Golt; V. A. Grishmanovskii; A. N. Kozlov; E. P. Molotov; Ya. S. Yatskiv; R. M. Martirosyan; I. G. Moiseev; Alan E. E. Rogers; Francois Biraud; A. Boichaut; Peter Kaufmann; Peter G. Mezger; Ricardo B. Schwarz; B. O. Ronang
Archive | 1986
Roald Sagdeev; J. Kissel; E. N. Evlanov; L. M. Mukhin; B. V. Zubkor; O. F. Prilutskii; Marina N. Fomenkova
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