| Name | OT2_pcaselli_8 |
| Title | Unveiling the initial conditions of high-mass star and stellar cluster formation |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342244946&instrument_name=HIFI&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-527q70x |
| Author | caselli, p. |
| Description | This proposal will help answer two major open questions in the field of star formation: 1) What causes a particular region of a molecular cloud to attain high densities on the way to forming a star cluster? 2) What is the physical structure of such pre-star-cluster massive clumps? We plan to study the structure and kinematics of the envelope and the dense gas in four massive (M > 100 M_sun) pre-star-cluster clumps embedded in Infrared Dark Clouds. The selected objects have physical and chemical properties which resemble scaled-up versions of low-masspre-stellar cores (they are cold, dense and show large abundances of deuterated molecules). They are also dark at 24&70 micron within the Herschel beam in Band 1. Therefore, they are the ideal targets where to study the initial conditions in the process of high-mass and stellar clusterformation. We plan to simultaneosly observe ortho-H2O(1_10-1_01) (in absorption)and ortho-NH3(1_1-0_1) (in emission) to study the kinematics of the clump and the embedded dense cores. These results will also be compared to recent work toward low-mass pre-stellar cores to studyhow different environments affect the chemistry and the dynamical evolution of the earliest stages of star formation. We also plan to observe CO(8-7), (9-8) and (10-9) to investigate ifturbulence dissipation and shocks play an important role in the formation of dense cores and fragmentation of massive clumps. Theseobservations are based on comprehensive MHD shock and PDR model predictions. |
| Publication |
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| Instrument | HIFI_HifiPoint_pos, HIFI_HifiMapping_fly |
| Temporal Coverage | 2012-04-25T19:17:11Z/2012-11-03T01:23:50Z |
| 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 | 2013-05-03T00:37:25Z |
| Last Update | 2026-03-02 |
| Keywords | Herschel Space Observatory data, ESA Herschel mission dataset, far-infrared astronomy observations, submillimeter astronomy data, infrared space telescope observations, PACS photometer data, PACS spectrometer data, SPIRE photometer data, SPIRE Fourier transform spectrometer data, HIFI heterodyne spectroscopy data, far-infrared spectroscopy dataset, submillimeter spectral line observations, cold universe observations dataset, star formation infrared data, molecular cloud far-infrared observations, interstellar medium spectroscopy data, protoplanetary disk infrared observations, galaxy evolution far-infrared data, dust emission submillimeter observations, cosmic infrared background measurements, extragalactic infrared survey data, calibrated level 2 data products, FITS files astronomy, spectral cubes far-infrared, flux-calibrated maps, continuum photometry data, spectral energy distribution measurements, ESA Herschel Science Archive data |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, caselli et al., 2013, 'Unveiling the initial conditions of high-mass star and stellar cluster formation', SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-527q70x |