|CI and CII in the circumstellar environment of the carbon-rich AGB star Y CVn
|We propose to map the extended circumstellar environment of the carbon star Y CVn in the sub-mm lines of CI and CII. The high spectral resolution of HIFI will allow us to analyze in detail the line profiles and to separate the 12C from the 13C emissions. The comparison with the data obtained with the VLA in the HI line at 21 cm will allow us to disentangle the thermal broadening from the kinematic broadening. We will thus get access to the temperature profile in the circumstellar envelope and be able to constrain the cooling of circumstellar matter. The data will also provide the 12C-13C ratio and the carbon ionization state as a function of distance to the central star.
|HIFI_HifiPoint_pos, HIFI_HifiMapping_fs-raster, HIFI_HifiMapping_fly
|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.
|Publisher And Registrant
|European Space Agency
|European Space Agency, 2013, OT2_ylibert_2, SPG v14.1.0. https://doi.org/10.5270/esa-l4jiui4