EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign [PDF]
, 2011 Earth- and space-based observations provide synergistic information for space mission encounters by providing data over longer timescales, at different wavelengths and using techniques that are impossible with an in situ flyby.
Robert R. Howell (10060342)
core +11 more sources
COMETARY VOLATILES AND THE ORIGIN OF COMETS [PDF]
The Astrophysical Journal, 2012 We describe recent results on the CO/CO2/H2O composition of comets together with a survey of older literature (primarily for CO/H2O) and compare these with models of the protoplanetary disk. Even with the currently small sample, there is a wide dispersion in abundance ratios and little if any systematic difference between Jupiter-family comets (JFCs ...
A'Hearn, Michael F. +22 more
openaire +3 more sources
Direct Simulation Monte Carlo Modeling of Ammonia in Comet C/2014 Q2 (Lovejoy)
The Astronomical Journal, 2023 Ammonia (NH _3 ), likely the most abundant nitrogen-bearing molecule in cometary ices followed by hydrogen cyanide, is believed to be stored in the nucleus predominantly as a parent ice.
Hideyo Kawakita +7 more
doaj +1 more source
Organic Matter in Cometary Environments
Life, 2021 Comets contain primitive material leftover from the formation of the Solar System, making studies of their composition important for understanding the formation of volatile material in the early Solar System.
Adam J. McKay, Nathan X. Roth
doaj +1 more source
TNO or Comet? The Search for Activity and Characterization of Distant Object 418993 (2009 MS9)
The Planetary Science Journal, 2023 The perihelion of the trans-Neptunian object (TNO) 2009 MS9 brings it close to the distance where some long-period comets are seen to become active.
Erica Bufanda +12 more
doaj +1 more source
On the origin of O2 and other volatile species in comets [PDF]
Proceedings of the International Astronomical Union, 2017 AbstractMolecular oxygen, O2, was recently detected in comet 67P by the ROSINA instrument on board the Rosetta spacecraft with a surprisingly high abundance of 4% relative to H2O, making O2 the fourth most abundant in comet 67P. Other volatile species with similar volatility, such as molecular nitrogen N2, were also detected by Rosetta, but with much ...
Taquet, V.D.F. +3 more
openaire +4 more sources
Disintegration of Long-period Comet C/2021 A1 (Leonard)
The Astronomical Journal, 2023 We present imaging observations of the disintegrating long-period comet C/2021 A1 (Leonard). High-resolution observations with the Hubble Space Telescope show no evidence for surviving fragments, and place a 3 σ upper limit on their possible radius of ...
David Jewitt +5 more
doaj +1 more source
Sodium Brightening of (3200) Phaethon near Perihelion
The Planetary Science Journal, 2023 Sunskirting asteroid (3200) Phaethon has been repeatedly observed in Solar Terrestrial Relations Observatory (STEREO) Heliospheric Imager 1 (HI1) imagery to anomalously brighten and produce an antisunward tail for a few days near each perihelion passage,
Qicheng Zhang +4 more
doaj +1 more source
Constraints from Comets on the Formation and Volatile Acquisition of the Planets and Satellites [PDF]
Space Science Reviews, 2015 Comets play a dual role in understanding the formation and evolution of the solar system. First, the composition of comets provides information about the origin of the giant planets and their moons because comets formed early and their composition is not expected to have evolved significantly since formation.
Mandt, K. E. +6 more
openaire +4 more sources
Carbon Speciation and Solubility in Silicate Melts
Geophysical Monograph Series, Page 179-194., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Natalia Solomatova +2 more
wiley +1 more source