| Description |
We propose to observe a sample of nine very red protostars serendipitouslyidentified in PACS observations for the Herschel Orion Protostar Survey (HOPS). In contrast to the known Orion protostars targeted in HOPS, the new sourcesare undetected or very faint in Spitzer 24 micron imaging of Orion. They are redder than the known Orion Class 0 protostars, and appear similar to the most extreme Class 0 objects known. These objects are likely to be in a very early and short lived stage of protostellar evolution.With this sample, we aim to determine if the youngest protostars begin their lives in a violent energetic phase or in a more quiescent manner,slowly building their accretion and outflow power. To do this, we proposePACS Range Spectroscopy between 70 and 200 microns, observing theCO and H2O lines, and line spectroscopy centered on the 63 micronOI line. These far-IR cooling lines are powerful diagnostics ofshock heating by outflows and radiant UV heating from accretionluminosity. Through a comparison with existing HOPS observations,these observations will be a unique window on the early evolutionof outflows and accretion in protostars. |
| 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 |
