| Name | PHASE |
| Title | PHASE TRANSITIONS IN TRANSLUCENT CLOUDS |
| URL | |
| DOI | https://doi.org/10.5270/esa-cnnabc8 |
| Author | REACH, WILLIAM T |
| Description | we propose to observe the c+ 158-micron line emission in order to trace the phase transitions of c in the translucent cloud g236+39 (spring launch) or the edges of the dark cloud l183 (autumn launch). g236+39 has been shown to contain the phase transitions from h/h2 and c+/co, and we will propose to observe the ci 609-micron line for comparison to the iso observations. l183 has already be observed in ci line. both g236+39 and l183 have been observed in co and its 13co isotopomer. the c+ observations will be combined with ci observations in order to distinguish the c+/ci and ci/co transitions, which must lie between the cloud edge and the co cores. these phase transitions are a key both to the cloud thermodynamics (governed by the cooling through the c+ line) and the cloud chemistry of c-bearing species (governed by the abundance of c+). |
| Instrument | LWS01 , LWS02 |
| Temporal Coverage | 1997-02-05T19:17:10Z/1997-09-10T20:38:50Z |
| 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, REACH et al., 1999, 'PHASE TRANSITIONS IN TRANSLUCENT CLOUDS', 1.0, European Space Agency, https://doi.org/10.5270/esa-cnnabc8 |