Detection of radio emission from V1016 Cygni

Journal Article · Sat Sep 01 04:00:00 EDT 1973 · Nature (London) Phys. Sci., v. 245, no. 140, pp. 5-6

DOI:https://doi.org/10.1038/physci245005a0· OSTI ID:4373912

Purton, C R; Feldman, P A; Marsh, K A

It is stated that the infrared excesses reported in many earlytype emission line stars have been attributed to thermal re-radiation from circumstellar dust, with a contribution in some cases from free = free emission by circumstellar gas. If such gas is optically thin at cm wavelengths some of these objects should be detectable as radio sources. The detection of radio emission from V 1016 Cyg, which is a prominent infrared object of this type, is here reported. The observations were made at 2.8 cm (l0,63 GHz) using the 46m Algonquin Radio Observatory telescope, together with a beam switching receiver. The experimental technique is described in detail. Radio emission was detected on three separate occasions, and flux densities recorded were 8l plus or minus 11, 100 plus or minus 20, and 85 plus or minus 30 mfu, the weighted mean being 85 plus or minus mfu. It is stated to be reasonable to assume that the radio emission arises from free-free processes in circumstellar gas. Similar conclusions can be reached regarding the similar object HBV 475 (= V 1329 Cyg). (UK)

• Research Organization: York Univ., Toronto
• NSA Number: NSA-29-013420
• OSTI ID: 4373912
• Journal Information: Nature (London) Phys. Sci., v. 245, no. 140, pp. 5-6, Journal Name: Nature (London) Phys. Sci., v. 245, no. 140, pp. 5-6; ISSN NPSCA
• Country of Publication: United Kingdom
• Language: English

Related Subjects

*COSMIC RADIO SOURCES-- FLUX DENSITY
*STARS-- RADIOWAVE RADIATION
EMISSION
GHZ RANGE 01-100
INFRARED RADIATION
N56200* --Physics (Astrophysics & Cosmology)--Stars
N56300 --Physics (Astrophysics & Cosmology)--Quasi-stellar
Radio & X-Ray Sources
STELLAR ATMOSPHERES