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Radio emission from hot stars at two centimeters

Published online by Cambridge University Press:  14 August 2015

Donald C. Morton  and
Alan E. Wright
Donald C. Morton
Affiliation:
Anglo-Australian Observatory
Alan E. Wright
Affiliation:
Anglo-Australian Observatory

Extract

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Radio fluxes of 7.2 ± 1.1 and 69 ± 5 mJy at 14.7 GHz have been detected from the stars ζ Pup (O4If) and γ Vel (WC8+O9I) respectively with the 64-m telescope at Parkes, and upper limits have been determined for 9 more hot stars. The interpretation of these fluxes as free-free emission from a shell of ionized gas resulting from a stellar wind gives mass-loss rates = (6.5 ± 1.4) x 10−6 M⊙ yr−1 for ζ Pup and (3.9 ± 0.7) x 10−5 M⊙ yr−1 for γ Vel if H/He = 10 by number and the He is fully ionized. If the gas around γ Vel originates mainly from the WC8 star, the helium predominates and = (5.2 ± 0.9) x 10−5 or (17 ± 3) x 10−5 M⊙ yr−1 depending on whether the helium is doubly or singly ionized.

Type
Session 3: Infrared and Radio Data
Information
Symposium - International Astronomical Union , Volume 83: Mass Loss and Evolution of O-Type Stars , 1979 , pp. 155 - 163
Copyright
Copyright © Reidel 1979 

References

Abbott, D.C.: 1978 (preprint).Google Scholar
Barlow, M.J. and Cohen, M.: 1977, Astrophys. J. 213, 737.CrossRefGoogle Scholar
Barlow, M.J. and Cohen, M.: 1978 (in preparation).Google Scholar
Cassinelli, J.P., Olson, G.L. and Stalio, R.: 1978, Astrophys. J. 220, 573.CrossRefGoogle Scholar
Conti, P.S. and Smith, L.F.: 1972, Astrophys. J. 172, 623.CrossRefGoogle Scholar
Hutchings, J.B.: 1968. Monthly Notices Roy. Astron. Soc. 141, 329.CrossRefGoogle Scholar
Hutchings, J.B.: 1976a, Astrophys. J. 203, 438.CrossRefGoogle Scholar
Hutchings, J.B.: 1976b, Astrophys. J. Letters. 204, L99.CrossRefGoogle Scholar
Johnson, H.M.: 1978, Astrophys. J. Suppl. 36, 217.CrossRefGoogle Scholar
Lamers, H.J.G.L.M. and Morton, D.C.: 1976, Astrophys. J. Suppl. 32, 715.CrossRefGoogle Scholar
Lamers, H.J.G.L.M. and Rogerson, J.B.: 1978, Astron. Astrophys. 66, 417.Google Scholar
Lesh, J.R.: 1972, Astron. Astrophys. Suppl. 5, 129.Google Scholar
Moffat, A.F.J. and Seggewiss, W.: 1977, Astron. Astrophys. 54, 607.Google Scholar
Morton, D.C.: 1967, Astrophys. J. 150, 535.CrossRefGoogle Scholar
Morton, D.C.: 1976, Astrophys. J. 203, 386.CrossRefGoogle Scholar
Morton, D.C.: 1978 (paper presented at this Symposium).Google Scholar
Morton, D.C. and Wright, A.E.: 1978, Monthly Notices Roy. Astron. Soc. 182, 47 (Paper I).CrossRefGoogle Scholar
Panagia, N. and Felli, M.: 1975. Astron. Astrophys. 39, 1.Google Scholar
Seaquist, E.R.: 1976, Astrophys. J. Letters. 203, L35.CrossRefGoogle Scholar
Smith, L.F.: 1973, IAU Symposium No. 49, Wolf-Rayet and High-Temperature Stars, ed. Bappu, M.K.V. and Sahade, J. Google Scholar
Snow, T.P. and Morton, D.C.: 1976, Astrophys. J. Suppl. 32, 429.CrossRefGoogle Scholar
Spitzer, L.: 1962, Physics of Fully Ionized Gases, 2nd Edition, Interscience Publ., New York.Google Scholar
Wendker, H.J., Baars, J.W.M. and Altenhoff, W.J.: 1973, Nature, Physical Science. 245, 118.CrossRefGoogle Scholar
Willis, A.J. and Wilson, R.: 1978 (preprint).Google Scholar
Wright, A.E.: 1974, Monthly Notices Roy. Astron. Soc. 167, 251.CrossRefGoogle Scholar
Wright, A.E. and Allen, D.A.: 1978 (preprint).Google Scholar
Wright, A.E. and Barlow, M.J.: 1975, Monthly Notices Roy. Astron. Soc. 170, 41.CrossRefGoogle Scholar