J/A+A/574/A108 Molecular absorption lines in PKS 1830-211 (Schulz+, 2015)
The inhomogeneous ISM toward PKS 1830-211 SW. A detailed view on molecular gas
at a look-back time of 7.5 Gyr.
Schulz A., Henkel C., Menten K.M., Muller S., Muders D., Bagdonaite J.,
Ubachs W.
<Astron. Astrophys. 574, A108 (2015)>
=2015A&A...574A.108S 2015A&A...574A.108S
ADC_Keywords: QSOs ; Spectroscopy
Keywords: galaxies: abundances - galaxies: ISM -
galaxies: individual: PKS 1830-211 SW -
gravitational lensing: strong - radio lines: galaxies -
radio lines: ISM
Abstract:
Based on measurements with the Effelsberg 100-m telescope, a multiline
study of molecular species is presented toward the southwestern source
of the gravitational lens system PKS 1830-211, which is by far the
best known target for studying molecular gas in absorption at
intermediate redshift. Determining line parameters and optical depths
and performing large velocity gradient radiative transfer
calculations, the aims of this study are (1) to evaluate physical
parameters of the absorbing foreground gas at z∼0.89, in particular
its homogeneity, and (2) to monitor the spectroscopic time variability
caused by fluctuations in the z∼2.5 background continuum source.
Description:
The observations were carried out in a position-switching
λ=1.9, 1.3, and 1.0cm receivers of the 100-m telescope at
Effelsberg/Germany, mostly within the short period between August and
December 2001.
Objects:
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RA (2000) DE Designation(s)
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18 33 39.92 -21 03 39.9 PKS 1830-211 = MRC 1830-211
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 125 6 List of FITS spectra
sp/* . 6 Individual FITS spectra
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See also:
J/A+A/535/A103 : 7mm spectral survey of PKS 1830-211 (Muller+, 2011)
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- 22 I3 --- Nx [92/308] Number of wavelengths
24- 33 A10 "date" ObsDate Observation date (YYYY-MM-DDThh:mm:ss.sss)
35- 46 E12.6 Hz bFREQ [-1.65625e+07/-6.04426e+06]
Lower value of frequency interval
48- 58 E11.6 Hz BFREQ [6.5625e+06/1.46875e+07]
Upper value of frequency interval
60- 65 I6 Hz dFREQ [78125/156250] Spectral resolution
67 I1 Kibyte size [8/8] Size of FITS file
69- 80 A12 --- FileName Name of FITS file, in subdirectory sp
82-125 A44 --- Title Title of the file
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Acknowledgements:
Dirk Muders, dmuders(at)mpifr-bonn.mpg.de
(End) Patricia Vannier [CDS] 09-Jan-2015