| HAL : hal-00495808, version 1 |
| arXiv : 1006.0210 |
| Code Bibliographique ADS : 2010arXiv1006.0210F |
| DOI : 10.1051/0004-6361/201014672 |
| Fiche détaillée | Récupérer au format |
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| Astronomy and Astrophysics 518 (2010) L86 |
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| Herschel-PACS spectroscopy of the intermediate mass protostar NGC7129 FIRS 2 |
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| M. FichD. Johnstone |
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| (2010) |
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| Aims: We present preliminary results of the first Herschel spectroscopic observations of NGC7129 FIRS2, an intermediate mass star-forming region. We attempt to interpret the observations in the framework of an in-falling spherical envelope. Methods: The PACS instrument was used in line spectroscopy mode (R=1000-5000) with 15 spectral bands between 63 and 185 microns. This provided good detections of 26 spectral lines seen in emission, including lines of H2O, CO, OH, O I, and C II. Results: Most of the detected lines, particularly those of H2O and CO, are substantially stronger than predicted by the spherical envelope models, typically by several orders of magnitude. In this paper we focus on what can be learned from the detected CO emission lines. Conclusions: It is unlikely that the much stronger than expected line emission arises in the (spherical) envelope of the YSO. The region hot enough to produce such high excitation lines within such an envelope is too small to produce the amount of emission observed. Virtually all of this high excitation emission must arise in structures such as as along the walls of the outflow cavity with the emission produced by a combination of UV photon heating and/or non-dissociative shocks. |
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| 1 : | Osservatorio Astrofisico di Arcetri (INAF) |
| Osservatorio Astrofisico di Arcetri | |
| 2 : | Osservatorio di arcetri (INAF) |
| INFN | |
| 3 : | Osservatorio Astrofisico di Arcetri (INAF) |
| INFN | |
| 4 : | Centro de Investigaciones Biológicas (CSIC) |
| Consejo Superior de Investigaciones Cientificas | |
| 5 : | Observatoire aquitain des sciences de l'univers (OASU) |
| CNRS : UMS2567 – INSU – Université Sciences et Technologies - Bordeaux I | |
| 6 : | Laboratoire d'Astrophysique de Bordeaux (LAB) |
| CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I | |
| 7 : | Université Sciences et Technologies - Bordeaux 1 |
| Université Sciences et Technologies - Bordeaux I | |
| 8 : | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB) |
| CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I | |
| 9 : | Laboratoire Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE) |
| Université de Savoie – CNRS : FRE3220 | |
| 10 : | Astronomical Institute "Anton Pannekoek'' |
| University of Amsterdam | |
| 11 : | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA) |
| CNRS : UMR8112 – INSU – Observatoire de Paris – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Cergy Pontoise – Ecole normale supérieure de Paris - ENS Paris | |
| 12 : | Institute for Space Research Netherlands (SRON) |
| SRON Netherlands Institute for Space Research | |
| 13 : | Osservatorio di Astrofisica di Roma (OAR) |
| INAF | |
| 14 : | Onsala Space Observatory |
| Onsala Space Observatory | |
| 15 : | Centre d'étude spatiale des rayonnements (CESR) |
| CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III | |
| 16 : | Centre d'Etude Spatiale des Rayonnements |
| Aucune | |
| 17 : | ESO |
| ESO | |
| 18 : | Interplanetary Space Physics Institute (IFSI) (IFSI-INAF) |
| Interplanetary Space Physics Institute | |
| 19 : | Max-Planck-Institut für Radioastronomie (MPIFR) |
| Max-Planck-Institut | |
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| Domaine | : | Planète et Univers/Astrophysique/Astrophysique stellaire et solaire Physique/Astrophysique/Astrophysique stellaire et solaire |
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| Astrophysics - Galaxy Astrophysics |
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| Lien vers le texte intégral : |
| hal-00495808, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00495808 | |
| oai:hal.archives-ouvertes.fr:hal-00495808 | |
| Contributeur : Marie-Paule Pomies | |
| Soumis le : Mardi 29 Juin 2010, 09:01:17 | |
| Dernière modification le : Lundi 27 Septembre 2010, 09:44:27 | |