2024-03-28T19:16:27Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/26102022-10-10T10:57:07Zcom_10261_135com_10261_4col_10261_388
DIGITAL.CSIC
author
Fonfría, José Pablo
author
Agúndez, Marcelino
author
Tercero, Belén
author
Pardo Carrión, Juan Ramón
author
Cernicharo, José
2007-12-26T16:37:30Z
2007-12-26T16:37:30Z
2007-10-09
The Astrophysical Journal Letters, 646, 127 (2006)arXiv:0710.1836v1
http://hdl.handle.net/10261/2610
We report on the first detection of maser emission in the J=11-10, J=14-13 and J=15-14 transitions of the v=0 vibrational state of SiS toward the C-rich star IRC+10216. These masers seem to be produced in the very inhomogeneous region between the star and the inner dust formation zone, placed at 5-7 R*, with expansion velocities below 10 km/s. We interpret the pumping mechanism as due to overlaps between v=1-0 ro-vibrational lines of SiS and mid-IR lines of C2H2, HCN and their 13C isotopologues. The large number of overlaps found suggests the existence of strong masers for high-J v=0 and v=1 SiS transitions, located in the submillimeter range. In addition, it could be possible to find several rotational lines of the SiS isotopologues displaying maser emission.
eng
openAccess
Circumstellar matter
Masers
Stars: Asymptotic Giant Branch (AGB) and post-AGB
Stars: carbon
High-J v=0 SiS Maser Emission in IRC+10216: A New Case of Infrared Overlaps
preprint
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URL
https://digital.csic.es/bitstream/10261/2610/1/high.pdf
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URL
https://digital.csic.es/bitstream/10261/2610/4/high.pdf.txt
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high.pdf.txt