We would like to perform a systematic line survey of the prototype carbon-richAGB star IRC+10216. This object is particularly rich in carbon chain molecules and radicalsand shows an impressive HCN spectrum in the submillimeter and far-infrareddomains. The coverage of the HIFI instrument will permit to characterize the completemolecular content of the innermost zones of the envelope and complement the lowfrequency observations available from ground-based radio observatories. Thesensitivity of the survey is such that at 1 THz we approach the detection limit ofa ground based telescope such as the 30m IRAM radiotelescope after several hoursof observing time. The 1500 GHz we want to cover requires 45 hours of GT observingtime. A line survey covering 100 GHz with the 30m IRAM radiotelescope at an equivalentsensitivity requires several weeks of observing time.
Publication
Discovery of Time Variation of the Intensity of Molecular Lines in IRC+10216 in the Submillimeter and Far-Infrared Domains | Cernicharo J. et al. | The Astrophysical Journal Letters Volume 796 Issue 1 article id. L21 6 pp. (2014). | 796 | 10.1088/2041-8205/796/1/L21 | 2014ApJ...796L..21C | http://adsabs.harvard.edu/abs/2014ApJ...796L..21C
On the physical structure of IRC +10216. Ground-based and Herschel observations of CO and C2H | De Beck E. et al. | Astronomy & Astrophysics Volume 539 id.A108 17 pp. | 539 | 10.1051/0004-6361/201117635 | 2012A&A...539A.108D | http://adsabs.harvard.edu/abs/2012A%26A...539A.108D
A high-resolution line survey of IRC +10216 with Herschel/HIFI. First results: Detection of warm silicon dicarbide (SiC{_2}) | Cernicharo J. et al. | Astronomy and Astrophysics Volume 521 id.L8 7 pp. | 521 | 10.1051/0004-6361/201015150 | 2010A&A...521L...8C | http://adsabs.harvard.edu/abs/2010A%26A...521L...8C
Spectroscopic parameters for silacyclopropynylidene SiC2 from extensive astronomical observations toward CW Leo (IRC +10216) with the Herschel satellite | Muller Holger S. P. et al. | Journal of Molecular Spectroscopy Volume 271 Issue 1 p. 50-55. | 271 | 10.1016/j.jms.2011.11.006 | 2012JMoSp.271...50M | http://adsabs.harvard.edu/abs/2012JMoSp.271...50M
Instrument
HIFI_HifiFS_freq
Temporal Coverage
2010-05-11T01:54:52Z/2010-05-16T08:37:35Z
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.
European Space Agency, cernicharo et al., 2011, 'A molecular line survey of IRC+10216', SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-eepaf9j
