A Search for H2O Emission from Orion Population Stars

Details A Search for H2O Emission from Orion Population Stars A Search for H2O Emission from Orion Population Stars

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....94...80t&link_type=abstract

Astronomy and Astrophysics, Vol. 94, P. 80, 1981

Astronomy and Astrophysics

Astrophysics

26

Scientific paper

Eighty-one stars of the "Orion population" were searched for H2O maser emission at 22 GHz. The search was made over a radial velocity interval ranging from 130 km s-1 for the majority of the stars to ˜800 km s-1 for a few selected stars. Water maser emission was detected at the positions of only two stars. One of them, AS 501, is probably a long-period variable, and should therefore be removed from the list of the Orion population. The only other star detected, T Tauri, was already known to be associated with an H2O source. However, differing positions had been reported in the literature. We confirm that the H2O emission comes from T Tauri itself, to an accuracy of ±5". New H2O features at radial velocities of 9.6 and 11.8 km s-1 are reported. Upper limits are given for all the other stars investigated. Implications of the lack of H2O maser emission from most of the Orion population stars are briefly discussed.

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