Further VLA observations of hydrogen deficient stars.
Abstract
VLA observations at 6 cm have been obtained for three hydrogen-deficient objects (Upsilon Sgr, V 348 Sgr, and Abell 58). Abell 58 was also observed at 2 cm. Only upper limits to the flux density could be set for these sources. A new radio source at 6 cm was found in the field of Upsilon Sgr. The upper limit for 6-cm flux density of V 348 Sgr sets an upper limit to its reddening as E(B-V) = 0.65 or less. The hydrogen-deficient planetary nebula A 58 shows much lower radio flux than expected from the IR radio flux-density relationship of planetary nebulae.
- Publication:
-
Journal of Astrophysics and Astronomy
- Pub Date:
- September 1987
- DOI:
- 10.1007/BF02715044
- Bibcode:
- 1987JApA....8..227K
- Keywords:
-
- Hydrogen;
- Radio Astronomy;
- Stellar Composition;
- Stellar Spectrophotometry;
- Very Large Array (Vla);
- Centimeter Waves;
- Infrared Radiation;
- Planetary Nebulae;
- Radiant Flux Density;
- Astronomy