Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...174...95d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 174, no. 1-2, March 1987, p. 95-102. Research supported by the Alexander von H
Astronomy and Astrophysics
Astrophysics
31
Hydroxyl Emission, Stellar Envelopes, Stellar Mass Ejection, Supergiant Stars, Very Long Base Interferometry, Water Masers, Astronomical Maps, Line Spectra, Molecular Spectra, Stellar Motions
Scientific paper
A H2O spectrum of S Per obtained by the Onsala 20-m telescope on October 5, 1983; high-resolution VLBI observations of the H2O masers collected with a five station trans-Atlantic array on October 4, 1983; lower spatial resolution observations of the H2O maser obtained using the Very Large Array of the National Radio Astronomy Observatory on October 6-7, 1983; and Merlin observations of OH collected in October 1982 are analyzed. Maps of the H2O and OH masers were derived and compared in terms of velocity and position. It is determined that the OH maser lies in a region of 80 marcsec expanding at a maximum velocity of 16 km/sec, and the H2O masers, which are about 1.2 marcsec in size, are located in a thick shell with a radius of 60 marcsec expanding at velocities between 5-10 km/sec.
Booth Roy S.
Bowers Phillip F.
Chapman Jessica M.
Diamond Phil J.
Johnston Ken J.
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