منابع مشابه
A Search for N2 in Spectra of Comet C/2002c1 (ikeya-zhang)
We report lowand high-resolution spectra of comet C/2002C1 (Ikeya-Zhang) from McDonald Observatory. The comet had a well-developed ion tail including CO, CO2 , CH , and H2O . We used our high-resolution spectra to search for N2 . None was detected and we placed upper limits on N + 2 /CO + of 5.4× 10. N2 was detected in the low-resolution spectra but we show that this emission was probably tellu...
متن کاملWater production and release in Comet 153P/Ikeya–Zhang (C/2002 C1): accurate rotational temperature retrievals from hot-band lines near 2.9-μm
Multiple non-resonance fluorescence lines of water (H2O) were detected in Comet 153/P Ikeya–Zhang (2002 C1) between UT 2002 March 21.9 (Rh = 0.51 AU) and April 13.9 (Rh = 0.78 AU), using the Cryogenic Echelle Spectrometer (CSHELL) at the NASA Infrared Telescope Facility. Analysis of 2.9-μm water lines enabled accurate determination of rotational temperatures on three dates. The derived H2O rota...
متن کاملThe Fourth Positive System of Carbon Monoxide in the Hubble Space Telescope Spectra of Comets
The rich structure of the AΠ−XΣ system of carbon monoxide accounts for many of the spectral features seen in long slit HST -STIS observations of comets 153P/Ikeya-Zhang, C/2001 Q4 (NEAT), and C/2000 WM1 (LINEAR), as well as in the HST -GHRS spectrum of comet C/1996 B2 (Hyakutake). A detailed CO fluorescence model is developed to derive the CO abundances in these comets by simultaneously fitting...
متن کاملar X iv : a st ro - p h / 02 04 38 1 v 1 23 A pr 2 00 2 Chemical Processes in Cometary Comae
Recent developments in the chemical modelling of cometary comae are described. We discuss the cyanide chemistry and present new HCN observations of the recent comet C/2002 C1 (Ikeya-Zhang). The connection between interstellar and cometary organic molecules is discussed from the perspective of recent theories of interstellar gas-grain chemistry.
متن کاملthe search for the self in becketts theatre: waiting for godot and endgame
this thesis is based upon the works of samuel beckett. one of the greatest writers of contemporary literature. here, i have tried to focus on one of the main themes in becketts works: the search for the real "me" or the real self, which is not only a problem to be solved for beckett man but also for each of us. i have tried to show becketts techniques in approaching this unattainable goal, base...
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ژورنال
عنوان ژورنال: Astronomy and Geophysics
سال: 2002
ISSN: 1366-8781,1468-4004
DOI: 10.1046/j.1468-4004.2002.43219.x