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Photometry and Imaging of Comet C/2004 Q2 (Machholz) at Lulin and La Silla

Lin, Z. Y. and Weiler, M. and Rauer, H. and Ip, W. H. (2007) Photometry and Imaging of Comet C/2004 Q2 (Machholz) at Lulin and La Silla. Astronomy & Astrophysics, 469 (2), pp. 771-776. EDP Sciences. DOI: 10.1051/0004-6361:20077286 ISSN 0004-6361

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Abstract

Aims.We have investigated the development of the dust and gas coma of the comet C/2004 Q2 (Machholz) from December 2004 to January 2005 using observations obtained at the Lulin Observatory, Taiwan and the European Southern Observatory at La Silla, Chile. Methods.We determined the dust-activity parameter Afp and the dust color and derived Haser production rates and scale lengths of C <sub>2</sub> and NH<sub>2</sub>. An image enhancement technique was applied to study the morphology of the gas and dust coma. Results.Two jets were observed in the coma distributions of C<sub>2</sub> and CN of comet Machholz that were not formed in the dust coma. The jets showed a spiral-like structure and pointed at different position angles at different observing times. The formation of these jets can be explained by the presence of two active surface regions on a rotating cometary nucleus.

Item URL in elib:https://elib.dlr.de/47387/
Document Type:Article
Title:Photometry and Imaging of Comet C/2004 Q2 (Machholz) at Lulin and La Silla
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lin, Z. Y.Institute of Astronomy, National Central University, 300 Jungda Rd, Jungli City, TaiwanUNSPECIFIED
Weiler, M.UNSPECIFIEDUNSPECIFIED
Rauer, H.UNSPECIFIEDUNSPECIFIED
Ip, W. H.Institute of Astronomy, National Central University, 300 Jungda Rd, Jungli City, TaiwanUNSPECIFIED
Date:2007
Journal or Publication Title:Astronomy & Astrophysics
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:469
DOI :10.1051/0004-6361:20077286
Page Range:pp. 771-776
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:Comets, Comet Machholz
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Extrasolare Planeten (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Hedelt, Pascal
Deposited On:09 Jul 2007
Last Modified:08 Mar 2018 18:22

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