Observations and studies of celestial water masers.

Details Observations and studies of celestial water masers. Observations and studies of celestial water masers.

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999acaps..19..309w&link_type=abstract

Acta Astrophys. Sin., Vol. 19, No. 3, p. 309 - 317

Astronomy and Astrophysics

Astronomy

Water Masers: Infrared Sources, Water Masers: Interstellar Matter, Water Masers: H Ii Regions

Scientific paper

Using the 25 m telescope of Shanghai Astronomical Observatory, Joint Radio Astronomy Lab., water vapor maser emission at 22.2 GHz was surveyed for 19 known maser sources and 20 candidates of H II regions, 21 sources were detected, of which two are for the first time. Combining with some previous measured data, the time variations in the flux and velocity were obtained and discussed. Time variation in the peak flux density is common and includes two types, changes in the intensity of the same peak and swapping over of different peaks. And the later type also causes shifts in the peak velocity. Corresponding IRAS sources were identified and the relation between maser emission and the infrared parameters discussed. It is shown that the infrared intensity has a greater effect on maser production rate than the infrared color distribution.

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