Advertisement

Radio Emission from Active Young Stars in the Rho Ophiuchi Cloud

  • Ph. André
  • T. Montmerle
  • E. D. Feigelson
  • P. C. Stine
  • K. L. Klein
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 143)

Abstract

Multi-epoch radio-continuum surveys of the ρ Ophiuchi dark cloud were conducted with the Very Large Array to look for counterparts of over a hundred low mass pre-main-sequence stars, about half of which were found in a previous X-ray survey. A modest fraction of these are found to exhibit radio emission. No optical T Tauri star with strong Ha emission is detected; on the contrary, the emitting objects seem to lack dense circumstellar environment. Though a majority of the detected stellar sources have quiescent radio emission, two late-type PMS stars have shown radio flares similar to the largest flares seen on RS CVn systems. There is evidence that the radio-emitting objects are a class of PMS stars characterized by extended magnetic fields, and emit via the gyrosynchrotron mechanism.

Keywords

Radio Emission Radio Source Tauri Star Stellar Radius Christmas Tree 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. André, Ph.: 1987, in Montmerle and Bertout 1987.Google Scholar
  2. André, Ph., Montmerle, T., and Feigelson, E.D.: 1987a, A. J. 93, 1182.ADSCrossRefGoogle Scholar
  3. André, Ph., Montmerle, T., Feigelson, E.D., and Stine, P.C.: 1987b, in Circumstellar Matter, IAU Symp. No. 122, eds. I. Appenzeller and C. Jordan (Dordrecht: Reidel), p. 61.Google Scholar
  4. André, Ph., Montmerle, T., Feigelson, E.D., Stine, P.C., and Klein, K.L.: 1987c, submitted to Ap. J.Google Scholar
  5. Bouvier, J.: 1987, in Montmerle and Bertout 1987.Google Scholar
  6. Feigelson, E.D., and Montmerle, T.: 1985, Ap. J. (Letters) 289, L19.ADSCrossRefGoogle Scholar
  7. Feigelson, E.D.: 1987a, in Montmerle and Bertout 1987.Google Scholar
  8. Feigelson, E.D.: 1987b, in Proceedings of the 5th Cambridge Cool Star Workshop, eds. J.L. Linsky and R. Stencel (Berlin: Springer), in press.Google Scholar
  9. Gahm, G.F.: 1986, in Flares: Solar and stellar, ed. P.M. Gondhalekar (Rutherford Appleton Laboratory), RAL—86–085, p. 124.Google Scholar
  10. Havnes, O., and Goertz, C.K.: 1984, Astr. Ap. 138, 421.ADSGoogle Scholar
  11. Klein, K.L., and Chiuderi-Drago, F.: 1987, Astr. Ap. 175, 179.ADSGoogle Scholar
  12. Montmerle, T.: 1987, in Solar and Stellar Physics, eds. E.H. Schroter and M. Schussler (Berlin: Springer), in press.Google Scholar
  13. Montmerle, T., Koch-Miramond, L., Falgarone, E., and Grindlay, J.E.: 1983, Ap. J. 269, 182.ADSCrossRefGoogle Scholar
  14. Montmerle, T., André, Ph., Feigelson, E.D., Stine, P., and Bouvier, J.: 1987, in Star Forming Regions, IAU Symp. No. 115, eds. M. Peimbert and J. Jugaku (Dordrecht: Reidel), p. 45.Google Scholar
  15. Montmerle, T., and Bertout, C. (eds.): 1987, Protostars and Molecular Clouds (Saclay: CEA/Doc), in press.Google Scholar
  16. Mutel, R.L., and Lestrade, J.F.: 1985, A.J. 90, 493.ADSCrossRefGoogle Scholar
  17. Stine, P.C., Feigelson, E.D., André, Ph., and Montmerle, T.: 1987, submitted to A.J.Google Scholar
  18. Wilking, B.A., Schwartz, R.D., and Blackwell, J.H.: 1987, A.J. 94, 106.ADSCrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • Ph. André
    • 1
  • T. Montmerle
    • 1
  • E. D. Feigelson
    • 2
  • P. C. Stine
    • 2
  • K. L. Klein
    • 3
  1. 1.Service d’AstrophysiqueC.E.N. SaclayGif-sur-Yvette CedexFrance
  2. 2.Dept. of AstronomyPenn State UniversityUniversity ParkUSA
  3. 3.Observatoire de Paris — Section de Meudon, UA 324DASOPMeudon Principal CedexFrance

Personalised recommendations