Article (Scientific journals)
Production and kinematics of sodium atoms in the coma of comet Hale-Bopp
Arpigny, Claude; Rauer, H.; Manfroid, Jean et al.
1998In Astronomy and Astrophysics, 334 (Letters), p. 53-56
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Keywords :
COMETS: GENERAL; COMET: C/1995 O1 (HALE-BOPP); ATOMIC PROCESSES; LINE: PROFILES
Abstract :
[en] High-resolution spectra of sodium D line emission in comet Hale-Bopp (C/1995 O1) were obtained at the Observatoire de Haute-Provence, France, on 25-27 March and on 15-17 April, 1997. The observations have been used to measure the velocity of sodium atoms in the coma within 2 10(5) km from the nucleus. A comparison between the March and April data provides an illustration of the influence of the heliocentric radial velocity on the strength of the fluorescence (Swings effect), and on the velocity of Na atoms achieved by solar radiation pressure acceleration. Evidence for the presence of a distributed source in the coma is found from the relatively high tailward velocities on the sunward side of the coma, in addition to the sunward extent of sodium emission up to 1.4 10(5) km in April. Based on observations secured at OHP (France)
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Arpigny, Claude ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Rauer, H.
Manfroid, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Hutsemekers, Damien ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Jehin, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Crovisier, J.
Jorda, L.
Language :
English
Title :
Production and kinematics of sodium atoms in the coma of comet Hale-Bopp
Publication date :
1998
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
334
Issue :
Letters
Pages :
53-56
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 February 2010

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