[en] UVES and HIRES high-resolution spectra of Comet 9P/Tempel 1 are used to investigate the impact and rotational light curves of various species with a view toward building a simple model of the distribution and activity of the sources. The emission by OH, NH, CN, C[SUB]3[/SUB], CH, C[SUB]2[/SUB], NH[SUB]2[/SUB], and OI, are analyzed, as well as the light scattered by the dust. It is found that a simple model reproduces fairly well the impact light curves of all species combining the production of the observed molecules and the expansion of the material throughout the slit. The impact light curves are consistent with velocities of 400 600 m/s. Their modeling requires a three-step dissociation sequence ``Grand-Parent --> Parent --> Daughter'' to produce the observed molecules. The rotational light curve for each species is explained in terms of a single model with three sources. The dust component can however not easily be explained that way.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
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
Cochran, Anita L; Department of Astronomy and McDonald Observatory, University of Texas at Austin, C-1400, Austin, TX, USA
Arpigny, Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Jackson, William M; Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
Meech, Karen J; Institute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI, USA
Schulz, Rita; ESA/RSSD, ESTEC, P.O. Box 299, NL-2200 AG Noordwijk, The Netherlands
Zucconi, Jean-Marc; Observatoire de Besançon, F25010 Besançon Cedex, France
Language :
English
Title :
The impact and rotational light curves of Comet 9P/Tempel 1
Publication date :
2007
Journal title :
Icarus
ISSN :
0019-1035
eISSN :
1090-2643
Publisher :
Academic Press, San Diego, United States - California
A'Hearn M.F., and 32 colleagues. Deep Impact: Excavating Comet Tempel 1. Science 310 (2005) 258-264
Ballester P., Modigliani A., Boitquin O., Cristiani S., Hanuschik R., Kaufer A., and Wolf S. The UVES data reduction pipeline. Messenger 101 (2000) 31-36
Cochran A.L., Barker E.S., Ramseyer T.F., and Storrs A.D. The McDonald Observatory Faint Comet Survey-Gas production in 17 comets. Icarus 98 (1992) 151-162
Combi M.R., and Fink U. A critical study of molecular photodissociation and CHON grain sources for cometary C2. Astrophys. J. 484 (1997) 879-890
Festou M.C., and Feldman P.D. The forbidden oxygen lines in comets. Astron. Astrophys. 103 (1981) 154-159
Fink U., Combi M.R., and DiSanti M.A. Comet P/Halley-Spatial distributions and scale lengths for C2, CN, NH2, and H2O. Astrophys. J. 383 (1991) 356-371
Fray N., Bénilan Y., Cottin H., Gazeau M.-C., and Crovisier J. The origin of the CN radical in comets: A review from observations and models. Planet. Space Sci. 53 (2005) 1243-1262
Jehin E., Manfroid J., Hutsemékers D., Cochran A.L., Arpigny C., Jackson W.M., Rauer H., Schulz R., and Zucconi J.-M. Deep Impact: High resolution optical spectroscopy with the ESO VLT and the Keck I Telescope. Astrophys. J. 641 (2006) 145-148
Keller H.U., and 11 colleagues. Deep Impact observations by OSIRIS onboard the Rosetta Spacecraft. Science 310 (2005) 281-283
Meech K.J., and 208 colleagues. Deep Impact: Observations from a worldwide Earth-based campaign. Science 310 (2005) 265-269
Morgenthaler J.P., Harris W.M., Scherb F., Anderson C.M., Oliversen R.J., Doane N.E., Combi M.R., Marconi M.L., and Smyth W.H. Large-aperture [OI] 6300 photometry of Comet Hale-Bopp: Implications for the photochemistry of OH. Astrophys. J. 563 (2001) 451-461
Randall C.E., Schleicher D.G., Ballou R.G., and Osip D.J. Observational constraints on molecular scalelengths and lifetimes in comets. Bull. Am. Astron. Soc. 24 (1992) 1002
Rauer H., and 12 colleagues. Long-term optical spectrophotometric monitoring of Comet C/1995 O1 (Hale-Bopp). Astron. Astrophys. 397 (2003) 1109-1122
Schleicher D.G., and Millis R.L. Revised scale lengths for cometary NH. Astrophys. J. 339 (1989) 1107-1114
Schleicher D.G., Barnes K.L., and Baugh N.F. Photometry and imaging results for Comet 9P/Tempel 1 and Deep Impact: Gas production rates, postimpact light curves, and ejecta plume morphology. Astron. J. 131 (2006) 1130-1137
Schulz R., Owens A., Rodriguez-Pascual P.M., Lumb D., Erd C., and Stüwe J.A. Detection of water ice grains after the DEEP IMPACT onto Comet 9P/Tempel 1. Astron. Astrophys. 448 (2006) 53-56
Wyckoff S., Tegler S., Wehinger P.A., Spinrad H., and Belton M.J.S. Abundances in Comet Halley at the time of the spacecraft encounters. Astrophys. J. 325 (1988) 927-938