| Name | PDRDENS |
| Title | HIGH DENSITY PDR TRACERS |
| URL | |
| DOI | https://doi.org/10.5270/esa-92hw1bs |
| Author | STUTZKI, JUERGEN |
| Description | the high brightness of the mid-j 13co, mid-j and high-j 12co lines observed in many uv excited sources require the presence of very high density clumps in pdrs. the presence of these extremely high density clumps within massive star forming regions can be tested unambigiuously through observations of certain pdr species, whose chemical abundance and excitation require high (n(h) < 10^7 cm^-3) or very high densities (n(h) < 10^8 cm-3). such tracers are the h2o, oh and ch rotational lines. theoretical models predict that these molecules are chemically produced very efficiently in the outer hot layers of high density pdrs. |
| Instrument | LWS01 , LWS04 |
| Temporal Coverage | 1996-11-04T18:40:33Z/1997-04-29T07:06:02Z |
| 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, STUTZKI et al., 1999, 'HIGH DENSITY PDR TRACERS', 1.0, European Space Agency, https://doi.org/10.5270/esa-92hw1bs |