A dataset provided by the European Space Agency

Name DDT_jcernich_7
Title Time variability of thermal molecular emission in IRC+10216
URL

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DOI https://doi.org/10.5270/esa-wm87e16
Author cernicharo, j.
Description IRC+10216 is a Mira variable star with a long period of 649 days and an amplitude in K of 0.5
mag (Le Bertre 1982). Very recently, the first complete study with high spectral resolution of the
submillimeter and farIR spectrum of this object has been carried out with HIFI (Cernicharo et al.,
2010). In addition to the line survey of IRC+10216 a second program aiming at searching for light
hydrides in this object was submitted and granted as GT1. The data of the line survey and those of
the GT1 proposal were taken with 6 months of difference. We have been really surprised by the
comparison of both set of data. Figure 1 shows some selected frequencies for which data is
available from both proposals, while Figure 2 shows all CO, CS, and SiO lines that have been
observed in both periods. Some lines show a quite remarkable variation in the intensity, in some
cases by more than a factor of 2. The results are so surprising that we have checked all possible
instrumental effects before giving credit to the new and unexpected physical processes involved in
theemergentlineprofiles.
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 ,
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - II. Estimating radial velocity of SPIRE spectral observation sources . Scott Jeremy P. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4894S ,
Systematic characterization of the Herschel SPIRE Fourier Transform Spectrometer . Hopwood R. et al. . Monthly Notices of the Royal Astronomical Society, Volume 449, Issue 3, p.2274-2303 . 449 . 10.1093\/mnras\/stv353 . 2015MNRAS.449.2274H ,
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - III. Line identification and off-axis spectra . Benson Chris S. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4906B ,
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder I. The Spectral Feature Finder and Catalogue . Hopwood R. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4874H ,
Instrument SPIRE_SpireSpectrometer_, HIFI_HifiPoint_dbs, PACS_PacsRangeSpec_point
Temporal Coverage 2011-05-26T19:44:33Z/2011-06-09T16:47:58Z
Version SPG v14.2.0
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 2012-04-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, cernicharo, j., 2012, DDT_jcernich_7, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-wm87e16