Results 31 to 40 of about 902 (203)
The Volatile Composition of Comets [PDF]
Highlights of Astronomy, 1989 ABSTRACTComets may be our best probes of the physical and chemical conditions in the outer regions of the solar nebula during that crucial period when the planets formed. The volatile composition of cometary nuclei, in particular, can be used to decide whether comets are the product of a condensation sequence similar to that invoked to explain the ...
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Compact pebbles and the evolution of volatiles in the interstellar comet 2I/Borisov [PDF]
Nature Astronomy, 2021 12 pages, 4 ...
Bin Yang +8 more
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The next step for Rosetta ROSINA/DMFS data of comet 67P/Churyumov-Gerasimenko: the search for semi-volatiles species. [PDF]
, 2021 Using data from Rosetta/ROSINA's Double Focusing Mass Spectrometer (DFMS), a zoo of neutral molecules have been discovered in the coma of 67P/Churyumov-Gerasimenko, which led to a wealth of new insights regarding the comet itself, its formation and the ...
Dhooghe, Frederik +6 more
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The Gateway from Centaurs to Jupiter-family Comets: Thermal and Dynamical Evolution
The Astrophysical Journal, 2023 It was recently proposed that there exists a “gateway” in the orbital parameter space through which Centaurs transition to Jupiter-family comets (JFCs).
Aurélie Guilbert-Lepoutre +3 more
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Volatile-rich comets ejected early on during Solar System formation
Astronomy & Astrophysics, 2022 Context. Comet C/2016 R2 PanSTARRS (hereafter C/2016 R2) presents an unusually high N2/CO abundance ratio, as well as a heavy depletion in H2O, making it the only known comet of its kind. Understanding its dynamical history is therefore of essential importance as it would allow us to gain a clearer understanding of the evolution of planetesimal ...
Sarah E. Anderson +4 more
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Investigating the Rosetta/RTOF observations of comet 67P/Churyumov-Gerasimenko using a comet nucleus model: influence of dust mantle and trapped CO [PDF]
, 2020 Context. Cometary outgassing is induced by the sublimation of ices and the ejection of dust originating from the nucleus. Therefore measuring the composition and dynamics of the cometary gas provides information concerning the interior composition of the
Capria, Maria Teresa +26 more
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Ice, Ice, Maybe? Investigating 46P/Wirtanen’s Inner Coma for Icy Grains
The Planetary Science Journal, 2023 The release of volatiles from comets is usually from direct sublimation of ices on the nucleus, but for very or hyperactive comets other sources have to be considered to account for the total production rates.
Theodore Kareta +3 more
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, 2021 Context. The ESA Rosetta mission has allowed for an extensive in situ study of the comet 67P/Churyumov-Gerasimenko. In measurements performed by the ram gauge of the COmet Pressure Sensor (COPS), observed features are seen to deviate from the nominal ram
H. Balsiger +15 more
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CO and Other Volatiles in Distantly Active Comets
Publications of the Astronomical Society of the Pacific, 2017 The activity of most comets near the Sun is dominated by the sublimation of frozen water, the most abundant ice in comets. Some comets, however, are active well beyond the water-ice sublimation limit of ~3 au. Three bodies dominate the observational record and modeling efforts for distantly active comets: the long-period comet C/1995 O1 (Hale-Bopp ...
M. Womack, G. Sarid, K. Wierzchos
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The Volatile Carbon-to-oxygen Ratio as a Tracer for the Formation Locations of Interstellar Comets
The Planetary Science Journal, 2022 Abstract Based on the occurrence rates implied by the discoveries of 1I/‘Oumuamua and 2I/Borisov, the forthcoming Rubin Observatory Legacy Survey of Space and Time (LSST) should detect ≥one interstellar object every year. We advocate for future measurements of the production rates of H2O, CO2, and CO in these objects to estimate their ...
Darryl Z. Seligman +15 more
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