Results 171 to 180 of about 902 (203)
Parent Volatiles in Comet 9P/Tempel 1: Before and After Impact [PDF]
Science, 2005 We quantified eight parent volatiles (H 2 O, C 2 H 6 , HCN, CO, CH 3 OH, H 2 CO, C 2 H 2 , and CH 4 ) in the Jupiter-family comet Tempel 1 using high-
Michael J Mumma +2 more
exaly +5 more sources
Submillimetric spectroscopic observations of volatiles in comet C/2004 Q2 (Machholz) [PDF]
Astronomy and Astrophysics, 2012 We aim to determine the production rates of several parent and product volatiles and the 12C/13C isotopic carbon ratio in the long-period comet C/2004 Q2 (Machholz), which is likely to originate from the Oort Cloud. The line emission from several molecules in the coma was measured with high signal-to-noise ratio in January 2005 at heliocentric distance
M De Val-Borro, P Hartogh, C Jarchow
exaly +7 more sources
Inventory of the volatiles on comet 67P/Churyumov-Gerasimenko from Rosetta/ROSINA
Astronomy and Astrophysics, 2015 Context. The ESA Rosetta spacecraft (S/C) is tracking comet 67P/Churyumov-Gerasimenko in close vicinity. This prolonged encounter enables studying the evolution of the volatile coma composition. Aims.
Lena Le Roy, K Altwegg, Hans Balsiger
exaly +3 more sources
An Infrared Investigation of Volatiles in Comet 21P/Giacobini–Zinner [PDF]
Icarus, 1999 Abstract We obtained high resolution (λ/δλ∼10,000–20,000) infrared (IR) spectra of Comet 21P/Giacobini–Zinner (GZ) at five different wavelengths between 1.9 and 5.0 μm during 25–29 October 1998 using CSHELL at the NASA Infrared Telescope Facility (IRTF) on Mauna Kea.
H A Weaver, J Crovisier, T Y Brooke
exaly +2 more sources
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Icarus, 1992
The variations in total brightness of a comet when it is most active, near perihelion, are presently used as the bases of a volatility index (VI) for short-period (SP) and long-period (LP) comets. Volatility does not correlate with period among the LP comets, and thereby shows no 'aging' effect; similarly, the VI measurements are the same for SP and ...
openaire +1 more source
The variations in total brightness of a comet when it is most active, near perihelion, are presently used as the bases of a volatility index (VI) for short-period (SP) and long-period (LP) comets. Volatility does not correlate with period among the LP comets, and thereby shows no 'aging' effect; similarly, the VI measurements are the same for SP and ...
openaire +1 more source
The vaporization of the volatile fraction in comets
International Astronomical Union Colloquium, 1974AbstractVery large gas productions have been recently established for comets. They rule out desorption models of the cometary nucleus and strongly support the vaporization of an icy conglomerate. The vaporization theory of the cometary nucleus can also be used to predict, for different types of ice, the law of dependence of the non-gravitational force ...
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Solar nebula origin for volatile gases in Halley's comet
Icarus, 1990The conditions for Comet Halley formation are presently considered in light of the application of physical and chemical processes in the solar nebula environments to the present data base on the composition of the comet's gases. Key molecular ratios are compared to solar nebula model predictions, and the nebular thermochemistry is quantified for a ...
Steffi Engel +2 more
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Radiation formation of a non-volatile comet crust
1988Ion irradiation of the outer meters of a cometary surface can produce new molecular species in the solid state. Because of the interfaces with the interplanetary vacuum these species segregate in an irreversible way into a nonvolatile residue and new very volatile species.
R. E. Johnson +3 more
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An Energy Efficient Non-Volatile Flip-Flop based on CoMET Technology
2019 Design, Automation & Test in Europe Conference & Exhibition (DATE), 2019As we approach the limits of CMOS scaling, researchers are developing "beyond-CMOS" technologies to sustain the technological benefits associated with device scaling. Spin-tronic technologies have emerged as a promising beyond-CMOS technology due to their inherent benefits over CMOS such as high integration density, low leakage power, radiation ...
Robert Perricone +6 more
openaire +1 more source
The - and in water from comet P/Halley and the origin of cometary volatiles
Advances in Space Research, 1996exaly +2 more sources