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http://hdl.handle.net/20.500.12386/32804
Title: | VLBI observations of H2O and CH3OH masers in two high-mass YSOs | Authors: | Goddi, C. MOSCADELLI, Luca SANNA, ALBERTO CESARONI, Riccardo Minier, V. |
Issue Date: | 2007 | Journal: | PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION | Volume: | Astrophysical Masers and their Environments | Editors: | Chapman, Jessica M.; Baan, Willem A. | Number: | 242 | First Page: | 152 | Abstract: | We have conducted phase-reference VLBI observations of H<SUB>2</SUB>O and CH<SUB>3</SUB>OH masers toward two high-mass star forming regions, Sh 2-255 IR and AFGL 5142. In Sh 2-255 infrared water masers are aligned along a direction close to the orientation of a large scale H<SUB>2</SUB> jet, tracing possibly shocked material in a precessing jet, or, alternatively, the disk-wind emerging from the disk atmosphere. In AFGL 5142 water masers trace expansion at the base of a protostellar jet, whilst methanol masers are more probably tracing infalling than outflowing gas. Our results suggest that water and methanol masers trace different kinematic structures in the circumstellar gas. | Conference Name: | Astrophysical Masers and their Environments | Conference Place: | Alice Springs, Australia | Conference Date: | March 12-16, 2007 | URI: | http://hdl.handle.net/20.500.12386/32804 | URL: | https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/vlbi-observations-of-h2o-and-ch3oh-masers-in-two-highmass-ysos/1642143F650162F3ADE896762F4A8450 https://api.elsevier.com/content/abstract/scopus_id/38849095785 |
ISSN: | 1743-9213 | ISBN: | 978-0521-87464-9 | DOI: | 10.1017/S1743921307012768 | Bibcode ADS: | 2007IAUS..242..152G | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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Goddi_2007_IAUS.pdf | PDF editoriale | 155.39 kB | Adobe PDF | View/Open |
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