A Search for Water Masers in the Saturnian System

Details A Search for Water Masers in the Saturnian System A Search for Water Masers in the Saturnian System

2010-05-11

arxiv.org/abs/1005.1701v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

8 pages, 2 figures, accepted for publication in PASJ (Letter)

Scientific paper

We searched for H2O 6(1,6)-5(2,3) maser emission at 22.235 GHz from several Saturnian satellites with the Nobeyama 45m radio telescope in May 2009. Observations were made for Titan, Hyperion, Enceladus and Atlas, for which Pogrebenko et al. (2009) had reported detections of water masers at 22.235 GHz, and in addition for Iapetus and other inner satellites. We detected no emission of the water maser line for all the satellites observed, although sensitivities of our observations were comparable or even better than those of Pogrebenko et al.. We infer that the water maser emission from the Saturnian system is extremely weak, or sporadic in nature. Monitoring over a long period and obtaining statistical results must be made for the further understanding of the water maser emission in the Saturnian system.

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