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A variability study of the H2CO 6cm maser in IRAS 18566+0408

Published online by Cambridge University Press:  01 March 2007

E. Araya ,
P. Hofner ,
S. Kurtz ,
H. Linz ,
M. Sewilo ,
L. Olmi  and
C. Watson
E. Araya
Affiliation:
New Mexico Tech, Socorro, NM, USA. NRAO, Socorro, NM, USA.
P. Hofner
Affiliation:
New Mexico Tech, Socorro, NM, USA. NRAO, Socorro, NM, USA.
S. Kurtz
Affiliation:
Centro de Radioastronomìa y Astrofìsica, UNAM, México.
H. Linz
Affiliation:
MPIA, Heidelberg, Germany.
M. Sewilo
Affiliation:
Space Telescope Science Institute, Baltimore, USA.
L. Olmi
Affiliation:
Istituto di Radioastronomia, INAF, Florence, Italy. University of Puerto Rico at Rio Piedras, Puerto Rico.
C. Watson
Affiliation:
Manchester College, USA. email: earaya@nrao.edu
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Abstract

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We report the first detection of a short-duration (<3 months) outburst of an H2CO 6cm maser based on multi-epoch observations of IRAS18566+0408 obtained with Arecibo, the Green Bank Telescope, and the Very Large Array. The H2CO maser was observed nine times between 2002 and 2005. In May 2006 we began a two-year program of monthly monitoring with the Arecibo Telescope. The H2CO maser in IRAS18566+0408 is coincident with a young massive stellar object and the line profile of the maser suggests that the H2CO emission originates from two different regions, perhaps associated with the kinematics of a circumstellar disk.

Keywords

masersstars: formationISM: moleculesradio lines: ISM

References

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