A dataset provided by the European Space Agency

Name PAH_EVOL
Title SPECIFIC PAH AND AMORPHOUS CARBON STRUCTURES: THE EVOLUTION OF CARBON FROM CARBON STARS TO H-II REGIONS
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=395012010
DOI https://doi.org/10.5270/esa-9gpam44
Author ALLAMANDOLA, LOUIS J.
Description we propose to probe the evolution of interstellar carbon from the molecular to the particle phase by searching for the infrared emission signatures of specific polycyclic aromatic hydrocarbon (pah) molecules and various forms of amorphous carbon in carbon-rich objects which span the evolutionary range from late carbon stars to molecular clouds. we propose to achieve this goal by measuring the 5-9 micron spectra of these objects, the spectral region which is most diagnostic of these materials and the region in which they emit most strongly. this will provide direct insight into the processes of carbon nucleation and growth in circumstellar shells and the interstellar medium. this is the opportune time for this project. we propose to obtain spectra with iso of sufficient quality to detect the spectral substructure which must be present superimposed on the larger spectral features already observed in emission from these objects. with our lab data we will be able to interpret these spectra in terms of which molecules and amorphous carbon structures are actually present in these objects and determine their abundances. with data of the quality expected from iso, it will finally be possible to probe directly into the process of carbon nucleation and growth, gaining insight into the evolution of carbon from its molecular form to larger amorphous particles, and understand which species are associated with each type of object.
Instrument SWS06
Temporal Coverage 1996-12-03T11:48:34Z/1996-12-15T16:05:53Z
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 1999-04-08T00:00:00Z
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, ALLAMANDOLA et al., 1999, 'SPECIFIC PAH AND AMORPHOUS CARBON STRUCTURES: THE EVOLUTION OF CARBON FROM CARBON STARS TO H-II REGIONS', 1.0, European Space Agency, https://doi.org/10.5270/esa-9gpam44
Rights Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.