Access to Astronomical Catalogues

← Click to display the menu
J/A+A/499/233   IRAS 05345+3157 mm high-angular resolution maps (Fontani+, 2009)

Linking pre- and proto-stellar objects in the intermediate-/high-mass star forming region IRAS 05345+3157. Fontani F., Zhang Q., Caselli P., Bourke T.L. <Astron. Astrophys. 499, 233 (2009)> =2009A&A...499..233F
ADC_Keywords: Infrared sources ; Radio lines; Spectroscopy Keywords: stars: formation - ISM: molecules Abstract: To better understand the initial conditions of the high-mass star formation process, it is crucial to study at high-angular resolution the morphology, the kinematics, and eventually the interactions of the coldest condensations associated with intermediate-/high-mass star forming regions. The paper studies the cold condensations in the intermediate-/high-mass proto-cluster IRAS 05345+3157, focusing the attention on the interaction with the other objects in the cluster. We have performed millimeter high-angular resolution observations, both in the continuum and several molecular lines, with the PdBI and the SMA. The millimeter maps reveal the presence of 3 cores inside the interferometers primary beam, called C1-a, C1-b and C2. The lines, specifically N2H+ and N2D+, indicate the presence of two potential pre-stellar condensations (called N and S) not associated with the continuum sources. C1-b is very likely associated with a newly formed early-B ZAMS star embedded inside a hot-core, while C1-a is more likely associated with a class 0 intermediate-mass protostar. The nature of C2 is unclear. Both C1-a and C1-b are good candidates as driving sources of a powerful CO outflow, strongly interacting with both N and S, as demonstrated by the velocity gradient across both condensations. Our major conclusion is that the chemical properties of these pre-stellar cores are similar to those observed in low-mass isolated ones, while the kinematics is dominated by the turbulence triggered by the CO outflow, which can influence their evolution. Description: We give the interferometric image in the 96 GHz millimeter continuum and the data-cubes of the N2H+ (1-0) line, at 93GHz, obtained towards IRAS 05345+3157 with the PdBI. The primary beam at these frequencies is around 48arcsec, and the angular resolution is ∼3.5arcsec in both images. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 05 37 47.8 +31 59 24 IRAS 05345+3157 = NSV 2452 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 60 2 List of the files fits/* 0 2 FITS files
Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 26 A26 --- FileName Name of the fit file in subdirectory fits 30- 60 A31 --- Title Title of the file
Acknowledgements: Francesco Fontani, fontani(at)obs.unige.ch References: Fontani et al., Paper I 2008A&A...477L..45F
(End) Francesco Fontani [ISDC, Switzerland], Patricia Vannier [CDS] 13-Mar-2009
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