Access to Astronomical Catalogues

← Click to display the menu
J/A+A/527/A41       NH3 observations in outflows              (Sepulveda+, 2011)

Dense gas and the nature of the outflows. Sepulveda I., Anglada G., Estalella R., Lopez R., Girart J.M., Yang J. <Astron. Astrophys. 527, A41 (2011)> =2011A&A...527A..41S
ADC_Keywords: Interstellar medium Keywords: ISM: jets and outflows - ISM: molecules - stars: formation Abstract: We present the results of the observations of the (J,K)=(1,1) and the (J,K)=(2,2) inversion transitions of the NH3 molecule towards a large sample of 40 regions with molecular or optical outflows, using the 37m radio telescope of the Haystack Observatory. We detected NH3 emission in 27 of the observed regions and we mapped this emission in 25 of them. Additionally, we searched for the 616-523 H2O maser line towards six regions, detecting H2O maser emission in two of them. We estimate the physical parameters of the regions mapped in NH3 and, for each particular region, we analyze the distribution of high density gas and its relationship with the presence of young stellar objects We confirm with a larger sample of regions that the NH3 line emission is more intense towards molecular outflow sources than towards sources with optical outflow, suggesting a possible evolutionary scheme in which young stellar objects associated with molecular outflows lose progressively their neighboring high-density gas, weakening both the NH3 emission and the molecular outflow in the process, and making optical jets more easily detectable as the total amount of gas decreases. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file nh3_11.dat 83 27 List of files with NH3(1,1) data nh3_22.dat 83 10 List of files with NH3(2,2) data h2o_mas.dat 83 2 List of files with H2O maser data nh3_11/* 0 27 NH3(1,1) CLASS data files nh3_22/* 0 27 NH3(2,2) CLASS data files h2o_mas/* 0 2 616-523 H2O maser CLASS data files
See also: J/ApJ/463/205 : CS and NH3 Survey of H2O Maser Emission (Anglada+ 1996) J/A+A/461/197 : VLA NH3 observations of 5 IRAS sources (Wang+, 2007) Byte-by-byte Description of file: nh3_11.dat nh3_22.dat h2o_mas.dat
Bytes Format Units Label Explanations
1- 12 A12 --- FITSfile Name of the FITS data file in subdirectory h2o_mas, nh3_11 or nh3_22 14- 25 A12 --- Name Name of the region 27- 28 I2 h RAh Right ascension (B1950) 30- 31 I2 min RAm Right ascension (B1950) 33- 36 F4.1 s RAs Right ascension (B1950) 38 A1 --- DE- Declination sign (B1950) 39- 40 I2 deg DEd Declination (B1950) 42- 43 I2 arcmin DEm Declination (B1950) 45- 46 I2 arcsec DEs Declination (B1950) 49- 55 A7 "MM/YYYY" ObsEpoch1 1st Observation epoch 58- 64 A7 "MM/YYYY" ObsEpoch2 2nd Observation epoch 66- 75 A10 --- Name1 ? Other name of the region 77- 83 A7 --- Name2 ? Other name of the region
Acknowledgements: Inma Sepulveda, inma(at)rocknrock.com
(End) Inma Sepulveda [Univ. de Barcelona], Patricia Vannier [CDS] 04-Nov-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact