J/A+A/473/177 A search for pre-biotic molecules (Wirstrom+, 2007)
A search for pre-biotic molecules in hot cores.
Wirstrom E.S., Bergman P., Hjalmarson A., Nummelin A.
<Astron. Astrophys. 473, 177 (2007)>
=2007A&A...473..177W 2007A&A...473..177W
ADC_Keywords: Interstellar medium ; Radio lines ; Molecular clouds
Keywords: ISM: molecules - astrobiology - molecular data
Description:
Low-noise, 0.8MHz resolution spectra around 90GHz towards four hot
core sources: Orion KL, W51 e1/e2, S140, and W3(OH), are presented.
The observations were performed using the 3mm SIS receiver at the
Onsala 20m telescope. The observations were made in the beam-switching
mode, the spectrum intensity is given in TA* and high-order
polynomial baselines have been subtracted. At 90GHz the Onsala 20m
telescope has a beam FWHM of ∼42arcsec and a main-beam efficiency of
∼0.6. Due to changes in frequency setting during the observing period
the frequency ranges are not identical for each source, but in all
cases the ranges include the transitions used to determine the upper
column densities of amino acetonitrile (H2NCH2CN), vinyl acetylene
(C2H3CCH), oxiranecarbonitrile (c-C3H3NO), and amino-ethanol
(NH2CH2CH2OH), presented in the paper. Note that the
absorptions, seen in the S140 and the W3(OH) spectra around the strong
HCN-line at 90.663GHz, are artificial.
Objects:
------------------------------------------------------------------
RA (J2000) DE Designation(s) (File)
------------------------------------------------------------------
05 35 14.5 -05 22 30 Orion KL (orionkl.dat)
19 23 44.0 +14 30 29 W51 e1/e2 (w51e1e2.dat)
22 19 19.1 +63 18 50 S140 (s140.dat)
02 27 04.4 +61 52 21 W3(OH) (w3oh.dat)
------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 45 4 List of objects
fits/* . 4 FITS files of the spectra
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Name
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 21 F4.1 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 32 I2 arcsec DEs Declination (J2000)
34- 45 A12 --- FileName Name of the spectrum fits file in
subdirectory fits
--------------------------------------------------------------------------------
Acknowledgements:
Eva Wirstrom, eva(at)oso.chalmers.se
(End) Patricia Vannier [CDS] 11-Sep-2007