Rapid Fluctuations of Water Maser Emission in VY Canis Majoris

Details Rapid Fluctuations of Water Maser Emission in VY Canis Majoris Rapid Fluctuations of Water Maser Emission in VY Canis Majoris

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...507..384z&link_type=abstract

The Astrophysical Journal, Volume 507, Issue 1, pp. 384-386.

Astronomy and Astrophysics

Astronomy

5

Stars: Circumstellar Matter, Masers, Stars: Individual: Constellation Name: Vy Canis Majoris

Scientific paper

We report the observational results of short timescale monitoring of the 22 GHz water maser emission in VY CMa. A quasi-sinusoidal fluctuation has been detected with the relative flux intensity change of 20%-25% and a period of 10.3 day for two dominant features. This detected variability appears to be superimposed on the normal maser lines. We cannot easily explain the rapid fluctuation with the variation of the radiative input or the strong interstellar scintillation along the line of sight. The variation may be caused by the periodic shock.

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