A dataset provided by the European Space Agency

Name D_SOURCE
Title DISTRIBUTED SOURCES IN COMETARY COMAE COLUMN DENSITY PROFILES OF PARENT POTENTIAL PARENT MOLECULES
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=392007020
DOI https://doi.org/10.5270/esa-v72s3wr
Author SCHULZ, RITA
Description the main objective of the proposed research project is the search for distributed sources in cometary comae and the study of their physical and chemical properties. distinct evidence for the existance of such distributed sources for volatile material in comets has been found for comet halley in 1986, from which new concepts on cometary processes emerged. it is now widely believed that a significant portion of the volatiles in comets originate directly from grains that contain a certain amount of organic molecules. these organics as well as some of the most abundant gaseous parent molecules known in comets have no observable bands in the visible. their fundamental vibrational bands lie in regions in the near-ir where ground-based observations are either impossible or extremely difficult because of the atmospheric absorption. however, direct imaging of the inner coma of a comet with near-ir filters that reflect a substancial part of the parent molecules presently known to exist is imperative to distinguish between species originating exclusively at the nucleus and species that are at least partially produced from grains. at present almost nothing is known about the possible ejection mechanism of volatiles from grains. observational data are therefore urgently needed to determine the basic properties of distributed sources like their extension and their main compounds. the data that are proposed to be collected here would provide two-dimensional spatial profiles of the species most r^ant to the problem from which their production/destruction mechanisms can be modeled.
Instrument CAM01
Temporal Coverage 1996-12-09T01:55:24Z/1996-12-12T16:52:48Z
Version 1.0
Mission Description The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
Creator Contact https://support.cosmos.esa.int/iso/
Date Published 1998-10-17T00:00:00Z
Last Update 2026-07-09
Keywords Infrared Space Observatory data, ESA ISO mission dataset, ISO infrared observations, mid-infrared astronomy data, far-infrared spectroscopy dataset, ISOCAM imaging data, ISOPHOT photometry data, SWS short wavelength spectrometer data, LWS long wavelength spectrometer data, infrared spectral line observations, infrared imaging survey data, dust emission infrared observations, star formation infrared dataset, interstellar medium spectroscopy data, polycyclic aromatic hydrocarbons PAH features data, active galactic nuclei infrared observations, circumstellar envelope infrared data, planetary nebula infrared spectroscopy, extragalactic infrared survey data, calibrated ISO data products, FITS files infrared astronomy, spectral energy distribution infrared data, continuum photometry dataset, infrared spectral cubes, flux-calibrated infrared maps, ESA ISO Data Archive, legacy infrared space mission dataset
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, SCHULZ et al., 1998, 'DISTRIBUTED SOURCES IN COMETARY COMAE COLUMN DENSITY PROFILES OF PARENT POTENTIAL PARENT MOLECULES', 1.0, European Space Agency, https://doi.org/10.5270/esa-v72s3wr
Rights Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.