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2 edition of New molecular species in comet C/1995 (Hale-Bopp) observed with the Caltech Submillimeter Observatory found in the catalog.

New molecular species in comet C/1995 (Hale-Bopp) observed with the Caltech Submillimeter Observatory

New molecular species in comet C/1995 (Hale-Bopp) observed with the Caltech Submillimeter Observatory

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Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Millimeter waves.,
  • Molecular gases.,
  • Cometary atmospheres.,
  • Chemical composition.,
  • Molecular spectra.

  • Edition Notes

    StatementD.C. Lis ... [et al.].
    Series[NASA contractor report] -- NASA/CR-207519., NASA contractor report -- NASA CR-207519.
    ContributionsLis, D. C., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15547777M

    Many new cometary molecules — both parents and daughters — were detected in the exceptionally productive comet C/ O1 (Hale-Bopp).The space distribution of several of these species could be investigated from radio interferometry or from long-slit spectroscopy in the infrared. The distinction between parent species — directly sublimated from nucleus ices — and secondary species. summarize results of the observational campaign of comet Hale-Bopp organized at the CSO concerning new molecular species, ions, and iso-topic ratios. Preliminary estimates of molecular abundances are pre-sented. CSO observations of "classical" species are included in the long term monitoring of the gas production rates (Biver et al., ). 2.

    It is interest to discover whether cometary molecular species, such as CO 2, CO, and HCN, could survive the explosion. The synthesis of new molecular species in the cooling fireball may be of interest, as well as the production of high-temperature species such as CN, HCN, and nitrogen oxides by passage of the shock front through the Earth´s. A growing number of molecular species have been detected at radio wavelengths. Figure shows the time evolution of observed production rates for a large number of gases, subliming from comet Hale–Bopp (C/ O2).

    have now been detected. Many new identifications were obtained in Comet C/ B2 (Hyakutake), which passed within AU of Earth in March , and in the excep-tionally active Comet C/ O1 (Hale-Bopp). We discuss how each of these molecules was identified, how the spec-troscopic data are used to derive abundances, and we de-.   The observed components were mainly fragments B and C focusing on molecular species, e.g., HCN, HNC, CH 3 OH, CO, H 2 CO, CS, CN, and the isotopic ratio 13 N/ 14 N in HCN. A complete report of the comet's chemical taxonomy will be presented elsewhere (G. L. Villanueva et al. , in preparation).Cited by:


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New molecular species in comet C/1995 (Hale-Bopp) observed with the Caltech Submillimeter Observatory Download PDF EPUB FB2

In addition, a number of other molecular species are detected, including HNC, OCS, HCO+, CO+, and CN(the last two are first detections in a comet at radio wavelengths). New Molecular Species in Comet C/ O1 (Hale-Bopp) Observed with the Caltech Ssubmillimeter Observatory | Cited by:   New molecules found in comet C/ O1 (Hale-Bopp).

Investigating the link between cometary and interstellar material - NASA/ADS. We present millimetre and submillimetre observations of comet C/ O1 (Hale-Bopp) undertaken near perihelion with the Caltech Submillimeter Observatory and the m telescope and Plateau-de-Bure interferometer of the Institut de Radioastronomie Cited by: H_3O(+) is detected for the first time from the ground through its GHz line.

In addition, a number of other molecular species are detected, including HNC, OCS, HCO(+), CO(+), and CN (the last two are first detections in a comet at radio wavelengths). We present millimeter-wave observations of New molecular species in comet C/1995 book, HC3N, SO, NH2CHO, H(13)CN, and H3O(+) in comet C/ O1 (Hale-Bopp) obtained in February-April, with the Caltech Submillimeter Observatory (CSO).

HNCO, first detected at the CSO in comet C/ B2 (Hyakutake), is securely confirmed in comet Hale-Bopp via observations of three rotational transitions. New molecular species in comet C/ 1 (Hale-Bopp) observed with the Caltech Submillimeter Observatory.

Several rotational transitions of OCS and HNCO, whose first identifications were made previously in comet C/ B2 (Hyakutake), have also been detected, confirming that these molecular species are ubiquitous compounds of cometary atmospheres. Inferred abundances of OCS and HNCO relative to water in comet Hale-Bopp are % and %, respectively.

The H(13)CN () transition is also detected and the derived HCN/H(13)CN abundance ratio is 90 +/- 15, consistent with the terrestrial C/C ratio.

in addition, a number of other molecular species are detected, including HNC, OCS, HCO(+), CO(+), and CN (the last two are first detections in a comet at radio wavelengths).

New molecular species in comet C/ O1(Hale-Bopp) observed with the Caltech Submillimeter Observatory. Earth Moon Planets, – ADS CrossRef Google ScholarCited by:   Radio Line Observations Of Molecular And Isotopic Species In Comet C/ O1 (Hale-Bopp) D. Despois 1 Earth, Moon, and Planets volume Cited by: In addition, a number of other molecular species are detected, including HNC, OCS, HCO+, CO+, and CN(the last two are first detections in a comet at radio wavelengths).

View Show abstractAuthor: Jacques Crovisier. Comets are small bodies, but of great cosmic relevance. Given its pristine nature, they may preserve valuable and unique information on thechemical and physical processes that took place in theearly solar system, and that may be occurring in the formation of other planetary systems.

They might have even played a very important role in the origin of life on Earth. Get this from a library.

New molecular species in comet C/ (Hale-Bopp) observed with the Caltech Submillimeter Observatory. [D C Lis; United States. National Aeronautics and Space Administration.;]. Despois, D. () Radio Line Observations of Molecular and Isotopic Species in Comet C/ O1 (Hale-Bopp).

Earth, Moon, and Plan – CrossRef Google ScholarCited by: 5. Lis DC, Mehringer DM, Benford D, Gardner M, Phillips TG, Bockelée-Morvan D, Biver N, Colom P, Crovisier J, Despois D, Rauer H () New molecular species in Comet C/ O1 (Hale-Bopp) observed with the Caltech Submillimeter by:   Molecular lines from the comet are shown as emissions in the comet spectra above the atmospheric model.

The 1 σ noise level is ∼ 1 × 10 W m -2 (cm -1) -1 in the by: Observations of the CO J() GHz and J() GHz lines in comet C/ O1 (Hale-Bopp) were performed with the IRAM Plateau de Bure interferometer on 11 March, Following the perihelion passage of the very active long-period comet C/ Hale-Bopp inefforts (e.g., Rodgers & Charnley ) were undertaken to reproduce in chemical models the.

The HCN/HNC abundance ratio in Comet Hyakutake at a heliocentric distance of 1 AU is similar to that measured in the Orion extended ridge— a warm, quiescent molecular cloud. The HCN/H 13 CN abundance ratio implied by our observations is 34 ± 12, similar to that measured in giant molecular clouds in the galactic disk but significantly lower Cited by: The articles in this issue of Elements provide a fascinating account of comets and the making of our planetary system.

We learn why comets are visible to the naked eye, about their complex organic geochemistry, the surprising find of free O 2, and the likelihood of a comet impact on es present concise reviews of what has been learned regarding the mineralogy, geochemistry, and. David M.

Mehringer. National Radio Astronomy Observatory. New molecular species in comet C/ O1 (Hale-Bopp) observed with the Caltech Submillimeter Observatory.

Conference Paper. The appearance of comet Hale–Bopp enabled studies of the evolution of cometary activity in unprecedented detail.

At large heliocentric distances (R h Cited by: The release of carbon monoxide from Comet C/ O1 Hale-Bopp was studied between June and September using high resolution infrared spectroscopy near μm.1.

Setting the problem. The interest in the determination of absorption oscillator strengths, photodissociation lifetimes and fluorescence efficiency g-factors of the NS radical increased with the recent observation of this molecular species in Comet Hale-Bopp, by Irvine et al. ().The observation of this molecular species occurred through the detection of its rotational transition J = Cited by: 2.