Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292
Aims. The red MSX source G034.5964-01.0292 (MSXG34), catalogued as a massive young stellar object, was observed in molecular lines with the aim of discovering and studying molecular outflows. Methods. We mapped a region of 3′× 3′ centred at MSXG34 using the Atacama Submillimeter Telescope Experiment...
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todo:paper_00046361_v567_n_p_Paron2023-10-03T14:00:50Z Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292 Paron, S. Ortega, M.E. Petriella, A. Rubio, M. ISM: jets and outflows ISM: molecules Stars: formation Molecular mass Circumstellar materials ISM: jets and out flow ISM: molecules Molecular outflows Spectral energy distribution Star-forming region Stars: formation Young stellar objects Stars Aims. The red MSX source G034.5964-01.0292 (MSXG34), catalogued as a massive young stellar object, was observed in molecular lines with the aim of discovering and studying molecular outflows. Methods. We mapped a region of 3′× 3′ centred at MSXG34 using the Atacama Submillimeter Telescope Experiment in the 12CO J = 3-2 and HCO+J = 4-3 lines with an angular and spectral resolution of 22′′ and 0.11 km s-1 s-1. Additionally, public 13CO J = 1-0 and near-IR UKIDSS data obtained from the Galactic Ring Survey and the WFCAM Sciencie Archive were analysed. Results. We found that the 12CO spectra towards the YSO present a self-absorption dip, as is common in star-forming regions, and spectral wings that indicate outflow activity. The HCO+ was detected only towards the MSXG34 position at vLSR ~ 14.2 km s-1 s-1, in coincidence with the 12CO absorption dip and approximately with the velocity of previous ammonia observations. HCO+ and NH3 are known to be enhanced in molecular outflows. When we analysed the spectral wings of the 12CO line, we discovered misaligned red-and blue-shifted molecular outflows associated with MSXG34. The near-IR emission shows a cone-like nebulosity composed of two arc-like features related to the YSO, which might be due to a cavity cleared in the circumstellar material by a precessing jet. This can explain the misalignment in the molecular outflows. From the analysis of the 13CO J = 1-0 data we suggest that the YSO is very likely related to a molecular clump ranging between 10 and 14 km s-1 s-1. This suggests that MSXG34, with an associated central velocity of about 14 km s-1 s-1, may be located in the background of this clump. Thus, the blue-shifted outflow is probably deflected by the interaction with dense gas along the line of sight. From a spectral energy distribution analysis of MSXG34 we found that its central object probably is an intermediate-mass protostar. © 2014 ESO. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v567_n_p_Paron |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
ISM: jets and outflows ISM: molecules Stars: formation Molecular mass Circumstellar materials ISM: jets and out flow ISM: molecules Molecular outflows Spectral energy distribution Star-forming region Stars: formation Young stellar objects Stars |
| spellingShingle |
ISM: jets and outflows ISM: molecules Stars: formation Molecular mass Circumstellar materials ISM: jets and out flow ISM: molecules Molecular outflows Spectral energy distribution Star-forming region Stars: formation Young stellar objects Stars Paron, S. Ortega, M.E. Petriella, A. Rubio, M. Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292 |
| topic_facet |
ISM: jets and outflows ISM: molecules Stars: formation Molecular mass Circumstellar materials ISM: jets and out flow ISM: molecules Molecular outflows Spectral energy distribution Star-forming region Stars: formation Young stellar objects Stars |
| description |
Aims. The red MSX source G034.5964-01.0292 (MSXG34), catalogued as a massive young stellar object, was observed in molecular lines with the aim of discovering and studying molecular outflows. Methods. We mapped a region of 3′× 3′ centred at MSXG34 using the Atacama Submillimeter Telescope Experiment in the 12CO J = 3-2 and HCO+J = 4-3 lines with an angular and spectral resolution of 22′′ and 0.11 km s-1 s-1. Additionally, public 13CO J = 1-0 and near-IR UKIDSS data obtained from the Galactic Ring Survey and the WFCAM Sciencie Archive were analysed. Results. We found that the 12CO spectra towards the YSO present a self-absorption dip, as is common in star-forming regions, and spectral wings that indicate outflow activity. The HCO+ was detected only towards the MSXG34 position at vLSR ~ 14.2 km s-1 s-1, in coincidence with the 12CO absorption dip and approximately with the velocity of previous ammonia observations. HCO+ and NH3 are known to be enhanced in molecular outflows. When we analysed the spectral wings of the 12CO line, we discovered misaligned red-and blue-shifted molecular outflows associated with MSXG34. The near-IR emission shows a cone-like nebulosity composed of two arc-like features related to the YSO, which might be due to a cavity cleared in the circumstellar material by a precessing jet. This can explain the misalignment in the molecular outflows. From the analysis of the 13CO J = 1-0 data we suggest that the YSO is very likely related to a molecular clump ranging between 10 and 14 km s-1 s-1. This suggests that MSXG34, with an associated central velocity of about 14 km s-1 s-1, may be located in the background of this clump. Thus, the blue-shifted outflow is probably deflected by the interaction with dense gas along the line of sight. From a spectral energy distribution analysis of MSXG34 we found that its central object probably is an intermediate-mass protostar. © 2014 ESO. |
| format |
JOUR |
| author |
Paron, S. Ortega, M.E. Petriella, A. Rubio, M. |
| author_facet |
Paron, S. Ortega, M.E. Petriella, A. Rubio, M. |
| author_sort |
Paron, S. |
| title |
Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292 |
| title_short |
Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292 |
| title_full |
Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292 |
| title_fullStr |
Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292 |
| title_full_unstemmed |
Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292 |
| title_sort |
discovering a misaligned co outflow related to the red msx source g034.5964-01.0292 |
| url |
http://hdl.handle.net/20.500.12110/paper_00046361_v567_n_p_Paron |
| work_keys_str_mv |
AT parons discoveringamisalignedcooutflowrelatedtotheredmsxsourceg0345964010292 AT ortegame discoveringamisalignedcooutflowrelatedtotheredmsxsourceg0345964010292 AT petriellaa discoveringamisalignedcooutflowrelatedtotheredmsxsourceg0345964010292 AT rubiom discoveringamisalignedcooutflowrelatedtotheredmsxsourceg0345964010292 |
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1807316400959651840 |