J/A+A/482/179 Interferometric study of SgrB2(N) (Belloche+, 2008)
Detection of amino acetonitrile in SgrB2(N).
Belloche A., Menten K.M., Comito C., Mueller H.S.P., Schilke P., Ott J.,
Thorwirth S., Hieret C.
<Astron. Astrophys. 482, 179 (2008)>
=2008A&A...482..179B 2008A&A...482..179B
ADC_Keywords: Supernova remnants ; Masers ; Spectroscopy
Keywords: astrobiology - astrochemistry - line: identification -
stars: formation - ISM: individual objects: Sagittarius B2 -
ISM: molecules
Abstract:
Amino acids are building blocks of proteins and therefore key
ingredients for the origin of life. The simplest amino acid, glycine
(NH2CH2COOH), has long been searched for in the interstellar medium
but has not been unambiguously detected so far. At the same time, more
and more complex molecules have been newly found toward the prolific
Galactic center source Sagittarius B2.
Since the search for glycine has turned out to be extremely difficult,
we aimed at detecting a chemically related species (possibly a direct
precursor), amino acetonitrile (NH2CH2CN).
With the IRAM 30m telescope we carried out a complete line survey of
the hot core regions Sgr B2(N) and (M) in the 3mm range, plus partial
surveys at 2 and 1.3mm. We analyzed our 30m line survey in the LTE
approximation and modeled the emission of all known molecules
simultaneously. We identified spectral features at the frequencies
predicted for amino acetonitrile lines having intensities compatible
with a unique rotation temperature. We also used the Very Large Array
to look for cold, extended emission from amino acetonitrile.
Description:
The interferometric data from the IRAM Plateau de Bure interferometer
(PdBI), the Australian Telescope Compact Array (ATCA), and the Very
Large Array (VLA) are available at CDS in FITS format. They are all
calibrated, imaged and deconvolved. Only the VLA continuum image was
corrected for primary beam attenuation.
The PdBI data were calibrated, imaged, and deconvolved with
CLIC/MAPPING (GILDAS softwares) in Jy/beam and the FITS files were
produced with MAPPING (version January 2008) with the command FITS
applied on the GILDAS cubes (.lmv-clean).
The ATCA data were calibrated, imaged, and deconvolved with MIRIAD in
Jy/beam and the FITS files were produced with MIRIAD. The VLA data
were calibrated, imaged, and deconvolved with AIPS in Jy/beam and the
FITS files were produced with AIPS.
Objects:
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RA (2000) DE Designation(s)
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17 47 20.0 -28 22 40 Sgr B2 (N) = Name Sgr B2N
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
maps.dat 71 24 List if FITS files
fig/* . 24 Individual FITS files
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Byte-by-byte Description of file: maps.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- FileName Name of the fits file in subdirectory fig
15- 71 A57 --- Title Title of the file
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Acknowledgements:
Arnaud Belloche, belloche(at)mpifr-bonn.mpg.de
(End) Patricia Vannier [CDS] 12-Feb-2008