Water Production and Release in Comet C/1995 O1 Hale–Bopp

Russo, N. Dello

doi:10.1006/icar.1999.6268

Cited by 102 publications

(26 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The data were processed using algorithms specifically tailored to our comet observations. Application of these has been described elsewhere [ Dello Russo et al , 1998, 2000, 2001; Magee‐Sauer et al , 1999; DiSanti et al , 2001]. Initial processing included flat‐fielding, and removal of high dark current pixels and cosmic ray hits.…”

Section: Observations and Data Analysismentioning

confidence: 99%

“…The spatial profile for a species with a significant distributed source will be broader, falling off more slowly than ρ −1 (examples include OCS and CO in Hale‐Bopp [ Dello Russo et al , 1998; DiSanti et al , 1999, 2001], and CO in Hyakutake (M. A. DiSanti, M. J. Mumma, N. Dello Russo, K. Magee‐Sauer, and D. Griep, Evidence for a dominant native source of carbon monoxide in comet Hyakutake, submitted to Journal of Geophysical Research , 2002). However, properties of the comet (e.g., jets), observing conditions, and optical depth effects [see DiSanti et al , 2001] can also affect profile shapes, causing deviations from a ρ −1 distribution even for purely native species [ Dello Russo et al , 2000, 2001. We have demonstrated that comparison of spatial profiles for volatile species and simultaneously measured (associated) dust can provide a means for assessing the presence of a significant distributed source.…”

Section: Spatial Distribution Of H2o and C2h6 In Hyakutakementioning

confidence: 99%

“…Spectral lines of four hot‐bands have now been detected in comets. Reliable water production rates were obtained for Hale‐Bopp, 21P/Giacobini‐Zinner, C/1999 H1 (Lee), C/1999 S4 (LINEAR), and C/1999 T1 (McNaught‐Hartley) [ Weaver et al , 1999a; Dello Russo et al , 2000; Mumma et al , 2001a, 2001b, 2001c]. This approach is now used routinely for measuring water production in comets.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Production of ethane and water in comet C/1996 B2 Hyakutake

et al. 2002

View full text Add to dashboard Cite

= 0.64 AU preperihelion). Our long-slit infrared spectra featured both high spectral dispersion and high spatial resolution about the nucleus, permitting the extraction of rotational temperatures, production rates, and spatial distributions of species along the slit. Production rates were measured for water (on four dates) and ethane (on three dates). Their average relative abundance was C 2 H 6 /H 2 O = (6.2 ± 0.7) Â 10 À3 . The spatial distributions of C 2 H 6 and H 2 O molecules in the coma were consistent with both species being released directly from the nucleus on all dates, although asymmetries about the nucleus are seen for both gas and dust.

show abstract

Section: Observations and Data Analysismentioning

confidence: 99%

Section: Spatial Distribution Of H2o and C2h6 In Hyakutakementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Production of ethane and water in comet C/1996 B2 Hyakutake

et al. 2002

View full text Add to dashboard Cite

show abstract

“…Combi et al 1999) associated with excess energy from photochemistry. Recent progress has been made in ground based observations the H 2 O and CO parents in the IR (DelloRusso et al 2000;Crovisier and Le Bourlot 1983;Crovisier et al 1999) and Radio (Biver et al 2002;Neufeld et al 2000;Lecacheux et al 2003), however the use of daughter products as proxies for production rate continues to be a very important component of cometary research because of the complementary dynamical and distributional information they provide. (Tozzi et al 1998).…”

Section: Discussionmentioning

confidence: 99%

High Resolution Spectroscopic Campaigns to Support Spacecraft Observations of Comets with Small Telescopes

Harris

2009

Earth Moon Planet

View full text Add to dashboard Cite

Ground based observations of comets obtained in support of spacecraft missions and space telescopes have provided critical supporting context that greatly enhances the value of the combined dataset. Major areas of ground-based contribution include providing unique instrumental capabilities and an increased temporal or global perspective on the system under study. This paper describes a decades long program of supporting cometary observations focused on high resolving power measurements of ions and atomic/ molecular radicals in the coma. The instrumentation is described, along with the species under study and the results from a large campaign to study comet C/1995O1 (Hale-Bopp).

show abstract

“…However, the spatial profiles of cometary H 2 O have been observed by ground-based telescopes by observing non-resonance fluorescence emissions (Mumma et al 1995(Mumma et al , 1996Dello Russo et al 2000). Since H 2 O does not have any transitions in ultraviolet and visible regions, the forbidden emissions of its dissociative metastable products ([O I] 6300, 6364, 5577, 2972Å) have been used as tracers.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Forbidden Ultraviolet and Visible Emissions in Comet 67p/Churyumov–gerasimenko

Raghuram

Bhardwaj

Galand

2016

ApJ

View full text Add to dashboard Cite

Remote observation of spectroscopic emissions is a potential tool for the identification and quantification of various species in comets. The CO Cameron band (to trace CO 2 ) and atomic oxygen emissions (to trace H 2 O and/ or CO 2 , CO) have been used to probe neutral composition in the cometary coma. Using a coupled-chemistryemission model, various excitation processes controlling the CO Cameron band and different atomic oxygen and atomic carbon emissions have been modeled in comet 67P/Churyumov-Gerasimenko at 1.29 AU (perihelion) and at 3 AU heliocentric distances, which is being explored by ESAʼs Rosetta mission. The intensities of the CO Cameron band, atomic oxygen, and atomic carbon emission lines as a function of projected distance are calculated for different CO and CO 2 volume mixing ratios relative to water. Contributions of different excitation processes controlling these emissions are quantified. We assess how CO 2 and/or CO volume mixing ratios with respect to H 2 O can be derived based on the observed intensities of the CO Cameron band, atomic oxygen, and atomic carbon emission lines. The results presented in this work serve as baseline calculations to understand the behavior of low out-gassing cometary coma and compare them with the higher gas production rate cases (e.g., comet Halley). Quantitative analysis of different excitation processes governing the spectroscopic emissions is essential to study the chemistry of inner coma and to derive neutral gas composition.

show abstract

Water Production and Release in Comet C/1995 O1 Hale–Bopp

Cited by 102 publications

References 69 publications

Production of ethane and water in comet C/1996 B2 Hyakutake

Production of ethane and water in comet C/1996 B2 Hyakutake

High Resolution Spectroscopic Campaigns to Support Spacecraft Observations of Comets with Small Telescopes

Prediction of Forbidden Ultraviolet and Visible Emissions in Comet 67p/Churyumov–gerasimenko

Contact Info

Product

Resources

About