Monitoring OH / Infrared Stars at the Galactic Centre with the VLA

Details Monitoring OH / Infrared Stars at the Galactic Centre with the VLA Monitoring OH / Infrared Stars at the Galactic Centre with the VLA

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as..101..109v&link_type=abstract

Astronomy and Astrophysics Supplement, Vol.101, NO.1/OCT.I, P. 109, 1993

Astronomy and Astrophysics

Astrophysics

21

Stars: Oh/Ir, Interferometry, Galaxy (The): Center Of, Masers, Stars: Variable

Scientific paper

We present data on the variability of OH/IR stars at the Galactic centre. The observations were carried out with the VLA at 1612 MHz at 20 separate epochs over a period of three years. For each epoch 37 circumstellar OH maser sources were observed. In this paper the unique data reduction procedures for this project are described. We present "light curves" for the stars in the sample to which a periodic curve is fitted. The resulting periods are compared with those found for OH/IR stars found in various other parts of the Galaxy. For the "best" stars in our sample the phase lag between the blue and red-shifted part of the spectrum can be determined.

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