A dataset provided by the European Space Agency

Name SMCDIFFU
Title DIFFUSE INTERSTELLAR MEDIUM IN THE SMALL MAGELLANIC CLOUD ARE THERE PAHS IN THE SMALL MAGELLANIC CLOUD?
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=585003050
DOI https://doi.org/10.5270/esa-6hqwh2w
Author OKUMURA, KORYO
Description =========================================== this proposal is an extention of mc_diffu. =========================================== we still do not know if pahs (or other carbon dominated solid elements) exist in environments as deficient in metal as in the case of the smc. from the ultraviolet observations, the smc mean extinction curve shows a very weak bump at 0.22 microns compared to the galactic curve. this observational fact is thought to be related to the underabundance of carbon in the interstellar dust in these irregular galaxies compared to the solar neighborhood. from the iras observations on the smc one observes a very weak mid-infrared (12 and 25 microns) emission. there seems to be a tight correlation between the ratio nu*i(12 microns) to far-infrared and the abundance o/h, which suggests that the weakness of the 12 microns emission is due to a metallicity effect. the search of the pah features in the magellanic clouds will permit a more quantitative analysis in the frame of models accounting for the underabundance of carbon in the dust grain population. we propose supplementary observations to the previous mc_diffu in the smc. the principal goals of this proposal are: 1) a sensitive photometry over a broad range of wavelengths to constrain the models of grain population (composition and size distribution). 2) the detection of the near infrared features at 7.7 and 11.3 microns. 3) comparison between the far infrared emission and hi distribution.
Instrument CAM01 , PHT22
Temporal Coverage 1997-06-23T06:08:42Z/1997-07-08T13:10:16Z
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 2026-03-02
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, OKUMURA et al., 1999, 'DIFFUSE INTERSTELLAR MEDIUM IN THE SMALL MAGELLANIC CLOUD ARE THERE PAHS IN THE SMALL MAGELLANIC CLOUD?', 1.0, European Space Agency, https://doi.org/10.5270/esa-6hqwh2w