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On the Cometary Hydrogen Coma and Far UV Emission

Published online by Cambridge University Press:  22 February 2018

H. U. Keller

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Comet Tago-Sato-Kosaka (1969 IX, hereafter TSK) was the first medium bright comet passing by in the era of ultraviolet satellites. The Orbiting Astronomical Observatory (OAO-2), observed in January 1970 the strong Lyman alpha signal at 1216 A which led to the first detection of cometary hydrogen. The peak signal in the photometer field-of-view (FOV) of 10′ diameter was about 70 kR (Code et. al , 1970) The resonance scattering emission of hydrogen was optically thick in the central part of the coma. A rocket experiment of Jenkins and Wingert (1972) using an objective grating spectrograph confirmed the OAO-2 observations Later in Spring 1970 comet Bennett (1970 II) was observed in Lα by OAO-2 and by two photometers onboard the Orbiting Heophysical Observatory (0G0-5) (Bertaux and Blamont, 1970; Keller and Thomas, 1973).

Type
Part I
Information
International Astronomical Union Colloquium , Volume 25 , Issue Part1: The Study of Comets , 1976 , pp. 287 - 314
Copyright
Copyright © NASA 1976

References

Bertaux, J -L., Blamont, J. 1970, Compt. Rend. Acad. Sci 270, 1581.Google Scholar
Bertaux, J -L., Blamont, J., Festou, M. 1973, Astron. and Astrophys. 25, 415.Google Scholar
Biermann, L 1968, JILA Report No 93.CrossRefGoogle Scholar
Biraud, F., Burgois, G., Grovisier, J, Fillit, R., Gerard, E., Kazes, I. 1974, Astron. and Astrophys 34, 163 Google Scholar
Bohlin, J D., Drake, J. F., Jenkins, E B, Keller, H U I.A.U.Google Scholar
Broadfoot, A. L., Belton, M. J. S, McElroy, M B, Kumar, S. 1974, Comet Kohoutek Workshop, Huntsville Google Scholar
Carrington, T 1964, J Chem. Phys. 41, 2012.Google Scholar
Carruthers, G R, Opal, C. B, Page, T. L, Meier, R R., Prinz, D. K. 1974, Icarus, in pressGoogle Scholar
Code, A. D., Houck, T. E, Lillie, C F 1970, I A U Circ. 2201.Google Scholar
Code, A. D., Houck, T E., Lillie, C F. 1972, The Scientific Results from the Orbiting Astronomical Observatory (OAO-2), Ed Code, A D, NASA SP-310, 109 Google Scholar
Delsemme, A. H 1973, Astrophys Letters 14, 163.Google Scholar
Delsemme, A H., Rud, D. A 1973, Astron and Astrophys 28, 1 Google Scholar
Feldman, P D., Takacs, P Z, Fastie, W G, Donn, B 1974, Science 185, 705.Google Scholar
Feldman, P. D., Opal, C B., Meier, R R, Nicolas, K R, I. A. UGoogle Scholar
Haser, L. 1966, Congres Collogues L'Universite de Liege 37, 233.Google Scholar
Huppler, D. H Roessler, F L Scherb, F, Trauger, J T, I. A U.Google Scholar
Jenkins, E. B., Wingert, D. W 1972, Astrophys J 174, 697.Google Scholar
Keller, H. U. 1971, Mitt. Astron Ges. 30, 143.Google Scholar
Keller, H. U. 1973a, Astron. and Astrophys 23, 269 Google Scholar
Keller, H. U. 1973b, Astron and Astrophys 27, 51.Google Scholar
Keller, H. U., Lillie, C. F. 1974, Astron and Astrophys 34, 187.Google Scholar
Keller, H. U., Thomas, G E 1973, Astrophys J L87 Google Scholar
Keller, H. U., Bohlin, J D, Tousey, R 1975, Astron and Astrophys. (in press)Google Scholar
Keller, H. U., Thomas, G. E I A. UGoogle Scholar
Keller, H. U., Thomas, G E. 1975, Astron. and Astrophys., 39, 7.Google Scholar
Lillie, C. F 1974 private communication.Google Scholar
Lillie, C. F. I. A. U.Google Scholar
Lillie, C. F, Keller, H U, I. A. UGoogle Scholar
Mendis, D A, Holzer, T. E, Axford, W. I 1972, Astrophys Space Sci 15, 313.Google Scholar
Opal, C. B., Carruthers, G R., Prinz, D K., Meier, R.R. 1974, Science 185, 702.Google Scholar
Oppenheimer, M, I A. U.Google Scholar
Solomon, P. M. 1968, Nature 217, 334.CrossRefGoogle Scholar
Stief, L. J. 1966, J. Chem Phys 44, 277.Google Scholar
Wallis, M. K. 1974, Mon Not. R Astr Soc 166, 181 Google Scholar
Welge, K. H, Stuhl, F 1967, J Chem. Phys 46, 2440.Google Scholar