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Deep Impact: High-Resolution Optical Spectroscopy with the ESO VLT and the Keck I Telescope

Jehin, E. and Manfroid, J. and Hutsemékers, D. and Cochran, A. L. and Arpigny, C. and Jackson, M. W. and Rauer, H. and Schulz, R. and Zucconi, J.-M. (2006) Deep Impact: High-Resolution Optical Spectroscopy with the ESO VLT and the Keck I Telescope. The Astrophysical Journal, 641 (2), L145-L148. University of Chicago Press. doi: 10.1086/504110. ISSN 0004-637X.

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We report on observations of comet 9P/Tempel 1 carried out before, during, and after the NASA Deep Impact event (UT July 4), with the optical spectrometers UVES and HIRES mounted on the telescopes Kueyen of the ESO VLT (Chile) and Keck I on Mauna Kea (Hawaii), respectively. A total observing time of about 60 hr, distributed over 15 nights around the impact date, allowed us (1) to find a periodic variation of 1.709 ± 0.009 days in the CN and NH flux, explained by the presence of two major active regions; (2) to derive a lifetime gsim 5 × 10<sup>4</sup> s (at 1.5 AU) for the parent of the CN radical from a simple modeling of the CN light curve after the impact; (3) to follow the gas and dust spatial profiles' evolution during the 4 hr following the impact and derive the projected velocities (400 and 150 m s-1, respectively); and (4) to show that the material released by the impact has the same carbon and nitrogen isotopic composition as the surface material (<sup>12</sup>C/<sup>13</sup>C = 95 ± 15 and <sup>14</sup>N/<sup>15</sup>N = 145 ± 20).

Item URL in elib:https://elib.dlr.de/48369/
Document Type:Article
Title:Deep Impact: High-Resolution Optical Spectroscopy with the ESO VLT and the Keck I Telescope
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Jehin, E.European Southern ObservatoryUNSPECIFIEDUNSPECIFIED
Manfroid, J.Université de LiègeUNSPECIFIEDUNSPECIFIED
Hutsemékers, D.Université de LiègeUNSPECIFIEDUNSPECIFIED
Cochran, A. L.Department of Astronomy and McDonald Observatory, University ofUNSPECIFIEDUNSPECIFIED
Arpigny, C.Université de LiègeUNSPECIFIEDUNSPECIFIED
Jackson, M. W.University of CaliforniaUNSPECIFIEDUNSPECIFIED
Zucconi, J.-M.Observatoire de BesanconUNSPECIFIEDUNSPECIFIED
Date:April 2006
Journal or Publication Title:The Astrophysical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:L145-L148
Publisher:University of Chicago Press
Keywords:Tempel 1, Deep Impact
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: Paris, Philip
Deposited On:10 Jul 2007
Last Modified:27 Apr 2009 13:46

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