Radio emission from HD167362 and Vy2-2

Journal Article · Sat Sep 01 04:00:00 EDT 1973 · Nature (London) Phys. Sci., v. 245, no. 140, pp. 6-7

DOI:https://doi.org/10.1038/physci245006a0· OSTI ID:4367778

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

It is stated that many early type emission-line stars show a pronounced excess of infrared radiation; this may arise from thermal re-radiation by circumstellar dust, although in some cases the infrared spectra indicate that free-free emission by circumstellar gas may be the predominant mechanism. If such a gas is optically thin at cm. wavelengths some of these objects should be detectable as radio sources. Attempts were made to measure the radio emission from several such objects as a means of setting constraints on the latter hypothesis. Observations are here reported on HD 167362 and Vyssotsky 2-2, made at 2.8 cm (10.63 GHZ) with the 46 m Algonquin Radio Observatory telescope. Flux densities obtained for the former object, on several occasions, were 200 plus or minus 24 and l98 plus or minus 35 mfu, and for the latter object l15 plus or minus 11 mfu and 107 plus or minus 9 mfu, the appropriately weighted values being 200 plus or minus 18 mfu and 1l0 plus or minus 11 mfu. The measured radio flux density is comparable, in each case, with that in the near infrared. (UK)

• Research Organization: York Univ., Toronto
• NSA Number: NSA-29-013421
• OSTI ID: 4367778
• Journal Information: Nature (London) Phys. Sci., v. 245, no. 140, pp. 6-7, Journal Name: Nature (London) Phys. Sci., v. 245, no. 140, pp. 6-7; 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