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The volatile composition of comet C/2017 K2 (PanSTARRS)
2022<p class="p1">We present high resolution spectra of comet C/2017 K2 (PanSTARRS) (hereafter 17K2), obtained using the upgraded high resolution spectrometer of the VLT, CRIRES<span class="s1">+</span>.
Manuela Lippi +4 more
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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 ...
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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 ...
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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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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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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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Solids and Volatiles in Comets
1999Comets occupy a key position in the cycles of ices and dust in the Universe. Their nuclei have mostly kept intact the composition and morphology they had at their formation. The return of a comet close to the Earth and Sun is thus an appreciated opportunity to investigate the original state of the material which built up our Solar System.
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Volatiles in comets as probes to the early solar system
AIP Conference Proceedings, 2014Comets are considered as the remnants of the planetesimals (building blocks of the planets) formed in the proto-planetary disk of the Sun. They have retained the information about the formation and evolutional history of the early solar system. To investigate the chemical and physical conditions of the proto-planetary disk, comets have been studied as ...
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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
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Sublimation from icy jets as a probe of the interstellar volatile content of comets
Nature, 1999Comets are some of the most primitive bodies left over from the Solar System's early history. They may preserve both interstellar material and material from the proto-solar nebula, and so studies of their volatile components can provide clues about the evolution of gases and ices, as a collapsing molecular cloud transforms into a mature planetary ...
Blake, Geoffrey A. +4 more
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Infrared Observations Of Volatile Molecules In Comet Hale-Bopp
Earth, Moon, and Planets, 1997Infrared observations of comets C/1996 B2 (Hyakutake) and C/1995 O1 (Hale-Bopp) benefited from the high spectral resolution and sensitivity of echelle spectrometers now equipping ground-based telescopes and from the availability of the Infrared Space Observatory (ISO). From the ground, several hydrocarbons were unambiguously detected for the first time:
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