Dissecting the molecular structure of the Orion B cloud: insight from principal component analysis
| hal.structure.identifier | AMOR 2017 | |
| dc.contributor.author | GRATIER, P. | |
| hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
| dc.contributor.author | BRON, Emeric | |
| hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
| dc.contributor.author | GERIN, Maryvonne | |
| hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
| hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
| dc.contributor.author | PETY, Jérôme | |
| hal.structure.identifier | Harvard-Smithsonian Center for Astrophysics [CfA] | |
| dc.contributor.author | GUZMAN, Viviana V. | |
| hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
| hal.structure.identifier | Université Grenoble Alpes [2016-2019] [UGA [2016-2019]] | |
| hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
| dc.contributor.author | ORKISZ, Jan | |
| hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
| dc.contributor.author | BARDEAU, Sébastien | |
| hal.structure.identifier | Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC] | |
| dc.contributor.author | GOICOECHEA, Javier | |
| hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
| dc.contributor.author | LE PETIT, Franck | |
| hal.structure.identifier | National Radio Astronomy Observatory [NRAO] | |
| dc.contributor.author | LISZT, Harvey | |
| hal.structure.identifier | Harvard-Smithsonian Center for Astrophysics [CfA] | |
| dc.contributor.author | ÖBERG, Karin | |
| hal.structure.identifier | School of Physics and Astronomy [Cardiff] | |
| hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
| dc.contributor.author | PERETTO, Nicolas | |
| hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
| dc.contributor.author | ROUEFF, Evelyne | |
| hal.structure.identifier | Instituto de RadioAstronomía Milimétrica [IRAM] | |
| dc.contributor.author | SIEVERS, Albrech | |
| hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
| hal.structure.identifier | University of Exeter | |
| hal.structure.identifier | Maison de la Simulation [MDLS] | |
| dc.contributor.author | TREMBLIN, Pascal | |
| dc.date.issued | 2017 | |
| dc.identifier.issn | 0004-6361 | |
| dc.description.abstractEn | Context. The combination of wideband receivers and spectrometers currently available in (sub-)millimeter observatories deliver wide-field hyperspectral imaging of the interstellar medium. Tens of spectral lines can be observed over degree wide fields in about 50 h. This wealth of data calls for restating the physical questions about the interstellar medium in statistical terms.Aims. We aim to gain information on the physical structure of the interstellar medium from a statistical analysis of many lines from different species over a large field of view, without requiring detailed radiative transfer or astrochemical modeling.Methods. We coupled a non-linear rescaling of the data with one of the simplest multivariate analysis methods, namely the principal component analysis, to decompose the observed signal into components that we interpret first qualitatively and then quantitatively based on our deep knowledge of the observed region and of the astrochemistry at play.Results. We identify three principal components, linear compositions of line brightness temperatures, that are correlated at various levels with the column density, the volume density and the UV radiation field.Conclusions. When sampling a sufficiently diverse mixture of physical parameters, it is possible to decompose the molecular emission in order to gain physical insight on the observed interstellar medium. This opens a new avenue for future studies of the interstellar medium. | |
| dc.language.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.subject.en | Astrophysics - Astrophysics of Galaxies | |
| dc.subject.en | ISM: molecules | |
| dc.subject.en | ISM: clouds | |
| dc.subject.en | photon-dominated region (PDR) | |
| dc.subject.en | ISM: individual objects: Orion B | |
| dc.subject.en | methods: statistical | |
| dc.title.en | Dissecting the molecular structure of the Orion B cloud: insight from principal component analysis | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/0004-6361/201629847 | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph] | |
| dc.identifier.arxiv | 1701.04205 | |
| bordeaux.journal | Astronomy and Astrophysics - A&A | |
| bordeaux.page | A100 | |
| bordeaux.volume | 599 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01438758 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01438758v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2017&rft.volume=599&rft.spage=A100&rft.epage=A100&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=GRATIER,%20P.&BRON,%20Emeric&GERIN,%20Maryvonne&PETY,%20J%C3%A9r%C3%B4me&GUZMAN,%20Viviana%20V.&rft.genre=article |
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