| Name | AHE_HVC |
| Title | IONIZED CARBON IN HIGH VELOCITY CLOUDS |
| URL | |
| DOI | https://doi.org/10.5270/esa-sco8eeq |
| Author | HEITHAUSEN, ANDREAS |
| Description | hi high-velocity clouds (hvcs) have so far only be seen in the 21cm line of atomic hydrogen and as absorption features in optical spectra towards distant quasars. no firm estimates on their distances exist. therefore almost nothing is known about their chemical composition and physical parameters. despite several attempts no co has been found in hvcs. therefore the dominant cooling line for the clouds should be the 157.7micron cii fine structure line which we want to study towards an hi high-velocity cloud which is likely to interact with an intermediate velocity cloud. both clouds are positionally anticorrelated on the sky with almost no overlap between them. this unique positioning on the sky makes it possible to observe the cii line of the hvc without applying the time consuming fabry-perot mode of the lws which provides high frequency resolution. to get information on the interstellar radiation field of both clouds we want to observe two positions, one towards the ivc and one towards the hvc. the comparison of both positions will then give hints on the composition of the hvc and thus on its possible origin. |
| Instrument | LWS02 |
| Temporal Coverage | 1996-06-13T03:20:27Z/1996-06-13T04:58:17Z |
| 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, HEITHAUSEN et al., 1999, 'IONIZED CARBON IN HIGH VELOCITY CLOUDS', 1.0, European Space Agency, https://doi.org/10.5270/esa-sco8eeq |