J/A+A/549/A39 A 3mm molecular line survey of NGC1068 (Aladro+, 2013)
A λ=3mm molecular line survey of NGC1068.
Chemical signatures of an AGN environment
Aladro R., Viti S., Bayet E., Riquelme D., Martin S., Mauersberger R.,
Martin-Pintado J., Requena-Torres M.A., Kramer C., Weiss A.
<Astron. Astrophys. 549, A39 (2013)>
=2013A&A...549A..39A 2013A&A...549A..39A
ADC_Keywords: Spectra, millimetric/submm ; Active gal. nuclei
Keywords: ISM: molecules - galaxies: ISM - galaxies: individual: NGC1068 -
galaxies: nuclei - galaxies: active
Abstract:
We study the molecular composition of the interstellar medium (ISM)
surrounding an active galactic nucleus (AGN), by making an inventory
of molecular species and their abundances, to establish a chemical
differentiation between starburst galaxies and AGN.
We used the IRAM-30m telescope to observe the central 1.5-2kpc
region of NGC 1068, covering the frequencies between 86.2GHz and
115.6GHz. Using Boltzmann diagrams, we calculated the column
densities of the detected molecules. We used a chemical model to
reproduce the abundances found in the AGN, to determine the origin of
each detected species, and to test the influence of UV fields, cosmic
rays, and shocks on the ISM.
Description:
We present the results of a 3mm molecular line survey towards the
nucleus of the nearby AGN galaxy NGC1068. We show the final averaged
spectrum after eliminating bad scans and subtracting baselines of
order 0 or 1 to the individual spectra. Y-axis is in antenna
temperature scale.
Objects:
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RA (J2000) DE Designation(s)
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02 42 40.90 -00 00 46.0 NGC 1068 = M 77
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 112 1 Infornation on spectrum
fits/* 2880 23 3mm survey of the galaxy NGC 1068 in one spectrum
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See also:
J/ApJ/591/138 : Chandra X-ray sources of NGC 1068 (Smith+, 2003)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name
10- 18 F9.5 deg RAdeg Right Ascension of center (J2000)
19- 27 F9.5 deg DEdeg Declination of center (J2000)
29- 33 I5 --- Nx Number of pixels along X-axis
35- 57 A23 "datime" Obs.date Observation date
59- 65 F7.3 GHz bFREQ Lower value of relative frequency interval
67- 71 F5.3 GHz BFREQ Upper value of relative frequency interval
73- 79 I7 GHz dFREQ Frequency resolution
81- 82 I2 Kibyte size Size of FITS file
84- 94 A11 --- FileName Name of FITS file, in subdirectory fits
96-112 A17 --- Title Title of the FITS file
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Acknowledgements:
Filippo Tamassia, raladro(at)eso.org
(End) Rebeca Aladro [ESO] 16-Nov-2012