VLBI observations of H2O and CH3OH masers in two high-mass YSOs

Journal
Date Issued
2007
Author(s)
Goddi, C.
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•
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Minier, V.
DOI
Abstract
We have conducted phase-reference VLBI observations of H2O and CH3OH 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 H2 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.
Coverage
Astrophysical Masers and their Environments
All editors
Chapman, Jessica M.; Baan, Willem A.
Volume
242
Start page
152
Conferenece
Astrophysical Masers and their Environments
Conferenece place
Alice Springs, Australia
Conferenece date
March 12-16, 2007
Uri
Url
Issn Identifier
1743-9213
Ads BibCode
2007IAUS..242..152G
Rights
open.access
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