https://centre-janssen.observatoiredeparis.psl.eu/ fr SPIP - www.spip.net https://centre-janssen.observatoiredeparis.psl.eu/local/cache-vignettes/L24xH24/siteon0-628cb.gif?1717076087 https://centre-janssen.observatoiredeparis.psl.eu/ 24 24 https://centre-janssen.observatoiredeparis.psl.eu/A-3D-synoptic-view-of-the-Orion-B-molecular-cloud-198 https://centre-janssen.observatoiredeparis.psl.eu/A-3D-synoptic-view-of-the-Orion-B-molecular-cloud-198 2026-04-12T00:00:00Z text/html fr descriptif_rubrique <p>Organisateures : Jerome Pety (IRAM), Maryvonne Gerin (LERMA) <br class='autobr' /> The advent of wideband, high spectral resolution receivers in millimeter <br class='autobr' /> radio-astronomy turns almost any pointed observation into an unbiased <br class='autobr' /> spectral survey. The challenge is to use these new possibilities to <br class='autobr' /> classify the different kinds of environments (shocks, photo-dissociation <br class='autobr' /> regions, dense cores, diffuse gas, etc...) of the interstellar medium <br class='autobr' /> according to the molecules they contain. We aim at using signal separation (…)</p> - <a href="https://centre-janssen.observatoiredeparis.psl.eu/-A-3D-synoptic-view-of-the-Orion-B-molecular-cloud-" rel="directory">A 3D synoptic view of the Orion B molecular cloud</a> / <a href="https://centre-janssen.observatoiredeparis.psl.eu/+-descriptif_rubrique-+" rel="tag">descriptif_rubrique</a> <div class='rss_texte'><p>Organisateures : Jerome Pety (IRAM), Maryvonne Gerin (LERMA)</p> <p>The advent of wideband, high spectral resolution receivers in millimeter<br class='autobr' /> radio-astronomy turns almost any pointed observation into an unbiased<br class='autobr' /> spectral survey. The challenge is to use these new possibilities to<br class='autobr' /> classify the different kinds of environments (shocks, photo-dissociation<br class='autobr' /> regions, dense cores, diffuse gas, etc...) of the interstellar medium<br class='autobr' /> according to the molecules they contain. We aim at using signal separation<br class='autobr' /> techniques like those used to distinguish different kinds of geological<br class='autobr' /> formations from Earth satellite images. We will also confront the results<br class='autobr' /> of usual astro-chemistry studies with the novel approaches. This project<br class='autobr' /> should contribute to bring quantitative answers to several of the current<br class='autobr' /> question in star formation such as the interpretation of the relation<br class='autobr' /> between the mostly invisible H2 gas and its molecular tracers or the<br class='autobr' /> stellar feedback.</p></div>