SIMBAD references

2005PASJ...57..587S - Publ. Astron. Soc. Jap., 57, 587-594 (2005/August-0)

Water-vapor maser survey for active galactic nuclei: a megamaser in NGC 6926.

SATO N., YAMAUCHI A., ISHIHARA Y., SORAI K., KUNO N., NAKAI N., BALASUBRAMANYAM R. and HALL P.

Abstract (from CDS):

We made a survey of water-vapor maser emission for 93 AGNs with the Nobeyama 45-m and Mopra 22-m telescopes from 1999 to 2002. A megamaser was detected in a Seyfert 2 galaxy, NGC 6926, at a distance of 80Mpc, in 2002 June. [Greenhill et al. (2003a) have also reported a detection of the megamaser at the close date.] The peak flux density was 110mJy, and the total isotropic luminosity was 340 L<sub>☉</sub>. The maser shows triply peaked spectrum, suggesting an edge-on disk. A narrow-line feature of the maser components at V<sub>LSR</sub> = 6001 km s<sup>-1</sup> was strongly variable with a time scale of a few tens of days, and the variation should be of intrinsic origin. We also showed a possibility of variability of water-vapor maser emission of a megamaser previously detected in a Seyfert/ultraluminous FIR galaxy, NGC 6240.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual (NGC 6240, NGC 6926) - galaxies: Seyfert - masers - radio lines: galaxies

Simbad objects: 104

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