Radio measurements in the fields of gamma-ray sources. III. The star formation sigma-Ophiuchi.
Abstract
The star-forming region Rho-Ophiuchi, which has been detected as a COS-B gamma-ray source, 2CG 353+16, is observed in the radio continuum at wavelengths between 1.3 cm and 21 cm. Various known and new radio sources are identified. Time variability on scales of weeks to years for two sources can be assessed with high confidence levels. The H II region origin for Oph 1, Oph 6, Oph 9 and Oph 10 is ruled out. Five new radio sources are proposed as H II region candidates on the basis of their flat frequency spectrum.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1989
- Bibcode:
- 1989A&A...216..197S
- Keywords:
-
- Gamma Ray Astronomy;
- H Ii Regions;
- Ophiuchi Clouds;
- Radio Astronomy;
- Radio Sources (Astronomy);
- Pre-Main Sequence Stars;
- Radio Spectra;
- Sky Surveys (Astronomy);
- Star Formation;
- T Tauri Stars;
- Astrophysics