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J/other/IJAA/4.571 Methanol masers in HII regions (Farmer, 2014)
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Beginning of ReadMe :J/other/IJAA/4.571 Methanol masers in HII regions (Farmer, 2014)
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Disk-outflow models as applied to high mass star forming regions through
methanol and water maser observations.
Farmer H.
<Int. J. Astron. Astrophys., 4, 571 (2014)>
=2014IJAA....4..571F
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ADC_Keywords: H II regions ; Masers
Keywords: masers - methanol - massive star formation - stars: evolution -
stars: distances
Abstract:
As the recent publication by Breen et al. (2013MNRAS.435..524B) found,
Class II methanol masers are exclusively associated with high mass
star forming regions. Based on the positions of the Class I and II
methanol and H_2_O masers, UC HII regions and 4.5um infrared
sources, and the center velocities (vLSR) of the Class I methanol and
H_2_O masers, compared to the vLSR of the Class II methanol masers, we
propose three disk-outflow models that may be traced by methanol
masers. In all three models, we have located the Class II methanol
maser near the protostar, and the Class I methanol maser in the
outflow, as is known from observations during the last twenty years.
In our first model, the H_2_O masers trace the linear extent of the
outflow. In our second model, the H_2_O masers are located in a
circumstellar disk. In our third model, the H_2_O masers are located
in one or more outflows near the terminating shock where the outflow
impacts the ambient interstellar medium. Together, these models
reiterate the utility of coordinated high angular resolution
observations of high mass star forming regions in maser lines and
associated star formation tracers.
Description:
The data in these tables will allow the reconstruction of the line
spectra and maps created for my study. Each table gives the positions
(RA,Dec) of each object. Their distances from the Class II Methanol
Masers. and their line of sight velocities LSR.