Water Masers Associated with Herbig Be-Stars

Details Water Masers Associated with Herbig Be-Stars Water Masers Associated with Herbig Be-Stars

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...272..249p&link_type=abstract

Astronomy and Astrophysics, Vol.272, NO. 1/MAYI, P. 249, 1993

Astronomy and Astrophysics

Astrophysics

21

Masers, Molecular Processes, Stars: Pre-Main Sequence, Interstellar Medium: Molecules

Scientific paper

We present the results of repeated observations of the H2O line at 22.2 GHz towards a sample of 54 Herbig Ae/Be stars. Maser emission has been detected in three sources only, V645 Cyg, LkHα 234, and BD+40°4124, the latter being a first time detection. The main properties of BD+40°4124 and of the associated maser are discussed.
With the detection of BD+40°4124, the number of Herbig Ae/Be stars with H2O masers amounts to a total of 7, with a detection rate of ˜10%. This figure is intermediate between that typical of low-mass stars, ≲1%, and of massive stars, ≲30%. In addition, 6 out of the 7 known masers are also CO outflow sources, strongly suggesting a common physical origin for the two phenomena.

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