J/A+A/592/A51 3mm and 1mm spectra of IRC +10420 (Quintana-Lacaci+, 2016)
A lambda 3mm and 1mm line survey towards the yellow hypergiant IRC +10420.
N-rich chemistry and IR flux variations.
Quintana-Lacaci G., Agundez M., Cernicharo J., Bujarrabal V.,
Sanchez Contreras C., Castro-Carrizo A., Alcolea J.
<Astron. Astrophys. 592, A51 (2016)>
=2016A&A...592A..51Q 2016A&A...592A..51Q (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Spectroscopy
Keywords: molecular processes - circumstellar matter - radio lines: stars -
stars: individual: IRC +10420
Abstract:
Our knowledge of the chemical properties of the circumstellar ejecta
of the most massive evolved stars is particularly poor. We aim to
study the chemical characteristics of the prototypical yellow
hypergiant star, IRC +10420. For this purpose, we obtained full line
surveys at 1 and 3mm atmospheric windows.
We have identified 106 molecular emission lines from 22 molecular
species. Approximately half of the molecules detected are N-bearing
species, in particular HCN, HNC, CN, NO, NS, PN, and N2H. We used
rotational diagrams to derive the density and rotational temperature
of the different molecular species detected. We introduced an iterative
method that allows us to take moderate line opacities into account.
Description:
Spectra obtained for IRC+10420 with the IRAM 30m telescope at 3 and
1mm. The intensity is presented in Ta* (K).
Objects:
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RA (2000) DE Designation(s)
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19 26 48.09 +11 21 16.7 IRC +10420 = V* V1302 Aql
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 130 2 List of spectra
fits/* . 2 Individual fits spectra
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 I5 --- Nx Number of points
26- 48 A23 --- Obs.Date Observation date (YYYY-MM-DDThh:mm:ss.sss)
50- 59 F10.6 GHz RestFreq Rest frequency
61- 68 F8.4 GHz bFreq Lower value of frequency interval relative
to RestFreq
70- 77 F8.5 GHz BFreq Upper value of frequency interval relative
to RestFreq
79- 85 I7 Hz dFreq Frequency resolution
87- 88 I2 Kibyte size Size of FITS file
90-103 A14 --- FileName Name of FITS file, in subdirectory fits
105-130 A26 --- Title Title of the FITS file
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Acknowledgements:
Guillermo Quintana-Lacaci, g.quintana(at)icmm.csic.es
(End) Patricia Vannier [CDS] 18-Jul-2016