| Name | OT1_mgonza01_1 |
| Title | Kinematics and Chemistry in Ultracompact HII regions: the case of Mon R2. |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342250667&instrument_name=HIFI&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-dz9tsoa |
| Author | European Space Agency |
| Description | Ultracompact HII regions are defined as regions of ionized gas with diameters smaller than 0.1 pc. Mon R2 is the only nearby Ultracompact HII region that can be resolved with Herschel. This source has already been observed and has been proved to host a dense photon-dominated region surrounding the Ultracompact HII region. For the simplicity of its geometry and the absence of shocks, this source is an excellent target to investigate the chemistry of extreme PDRs. Observations done with HIFI during the Prioritary Science Phase combined with previous observations from the IRAM 30m telescope permitted to constrain a simple scenario to describe this region: a dense PDR layer ( n, =, 5\times10^6, cm^{-3} ) surrounded by a lower density ( n, =, 10^5,cm^{-3} ) UV protected envelope. We propose to do maps of tracers of the regions of the PDR close to the HII region in order to characterize its movement. At the same time, we propose to observe some hydrides molecules, which chemistry is poorly known in such regions. HIFI is a unique oportunity to study such hybrides with fine/hiperfine structures, due to its high resolution. That way, with only 3.4 hours of observation and some work in modeling and interpreting the results we would be able to characterize the kinematics and chemistry of this region, that can be used as a template of similar objects, like the surface layers of circumstellar disks and/or the nuclei of starburst galaxies. |
| Publication | |
| Instrument | HIFI_HifiPoint_dbs, HIFI_HifiMapping_fly |
| Temporal Coverage | 2012-09-05T17:21:06Z/2013-03-27T22:48:34Z |
| Version | SPG v14.1.0 |
| Mission Description | Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities. |
| Creator Contact | https://support.cosmos.esa.int/h®erschel/ |
| Date Published | 2013-09-27T22:22:36Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2013, Kinematics And Chemistry In Ultracompact Hii Regions: The Case Of Mon R2., SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-dz9tsoa |