Rho Cassiopeiae
Abstract
K. H. Hinkle, Kitt Peak National Observatory; D. L. Lambert and J. Tomkin, University of Texas at Austin; and R. E. Luck, Louisiana State University, write that they observed rho Cas = HR 9045 during Feb. 23-26. The circumstellar line profiles now contain a striking emission component. The circumstellar CO vibration-rotation band heads near 2.3 um, which were previously seen in absorption, are now in emission. Low J CO lines show the emission superposed on an absorption line. Similar profiles are seen in many neutral atomic lines in the red and near infrared. While the profiles of the circumstellar lines have developed strong emission since they were last observed in June 1980, the current phase may have begun in Sept. 1979 when the photospheric lines were observed to double. Photometric and spectroscopic monitoring of this peculiar supergiant would be of interest.
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- March 1981
- Bibcode:
- 1981IAUC.3580....3H