A New Source of Maser Radio Emission in the 1720-MHz OH Line
Abstract
Observations of the source of OH maser radio emission G188.946+0.886 on the Nançay Radio Telescope (France) are reported. We have detected for the first time an emission feature in the 1720-MHz satellite line in the OH molecule ground state. The radial velocity of the feature, V_{LSR}=3.6 km s^{-1}, is blueshifted with respect to the velocity interval of the emission in the main OH lines 1665 and 1667 MHz, 7-11 km s^{-1}. This suggests an association of the observed 1720-MHz feature with the blue wing of the bipolar outflow observed in this region in the CO line. No emission and(or) absorption in the other OH satellite line 1612 MHz was detected. We have also observed on the 22-meter Pushchino radio telescope the H_2O λ = 1.35 cm maser in G188.946+0.886, which has demonstrated a fast variability, especially in the features blueshifted with respect to the main-line OH emission.
- Publication:
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Astronomicheskij Tsirkulyar
- Pub Date:
- August 2013
- Bibcode:
- 2013ATsir1602....1C
- Keywords:
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- maser radio emission: 1720-MHz OH line