The spatial structure of a new OH maser feature in IRC +10420

Details The spatial structure of a new OH maser feature in IRC +10420 The spatial structure of a new OH maser feature in IRC +10420

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229l..87b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 229, Apr. 15, 1979, p. L87-L90.

Mathematics

Metric Geometry

16

Hydroxyl Emission, Interstellar Masers, Spatial Distribution, Supergiant Stars, Diameters, Emission Spectra, Stellar Envelopes, Very Long Base Interferometry

Scientific paper

A new feature has recently appeared in the 1612-MHz OH maser emission from the supergiant star IRC +10420. Its velocity interval, time evolution, and polarization properties are similar to the strongest features of the 1665-MHz emission, suggesting that both originate from the same region. A VLBI map of the new feature shows that it is separated by 0.75 arcsec from the most blueshifted emission. For a spherically symmetric geometry, the inferred diameter of an expanding circumstellar shell is of the order of 10 to the 17th cm.

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