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X-Ray Activity and Accretion in Young Stellar Objects

  • Thomas Preibisch

Abstract

I discuss recent observational results on the X-ray properties of young stellar objects, based mostly on Chandra and XMM-Newton observations. The sensitive X-ray data on large, well characterized samples of T Tauri stars (and a number of protostars) allow to study in detail the dependence of magnetic activity on the bulk properties of the young objects and to draw important clues towards the origin of the X-ray emission. The absence of a relation between X-ray activity and rotation for T Tauri stars clearly suggests that their magnetic activity cannot be simply explained by the action of a scaled-up solar-like dynamo. I discuss alternative models for the generation of magnetic fields and also consider the long standing question whether the X-ray properties of the T Tauri stars are related to the presence/absence of circumstellar disks or active accretion.

Keywords

X-rays young stellar objects T Tauri stars accretion 

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References

  1. Calvet, N. and Gullbring, E.: 1998, ApJ 509, 802.ADSCrossRefGoogle Scholar
  2. Favata, F. and Micela, G.: 2003, Space Sci. Rev., 108, 577.ADSCrossRefGoogle Scholar
  3. Favata, F., Giardino, G., Micela, G., Sciortino, S. and Damiani, F.: 2003, A&A 403, 187.ADSCrossRefGoogle Scholar
  4. Feigelson, E.D. and DeCampli, W.M.: 1981, ApT 243, L89.Google Scholar
  5. Feigelson, E.D. and Montmerle, T.: 1999, ARA&A 37, 363.ADSCrossRefGoogle Scholar
  6. Feigelson, E.D., Broos, P., Gaffney, J.A. III, Garmire, G., Hillenbrand, L.A., Pravdo, S.H., Townsley, L. and Tsuboi, Y.: 2002, ApT 574, 258.Google Scholar
  7. Feigelson, E.D., Gaffney, J.A. III, Gramire, G. and Hillenbrand, L.A., Townsley, L.: 2003, ApJ 584, 911.ADSCrossRefGoogle Scholar
  8. Flaccomio, E., Damiani, F., Micela, G. et al.: 2003, ApJ 582, 398.ADSCrossRefGoogle Scholar
  9. Getman, K.V., Feigelson, E.D., Townsley, L., Bally, J., Lada, C.J. and Reipurth, B.: 2002, Api 575, 354.ADSGoogle Scholar
  10. Giampapa, M.S., Rosner, R., Kashyap, V., Fleming, T.A., Schmitt, J.H.M.M. and Bookbinder, J.A.: 1996, Api 463, 707.ADSGoogle Scholar
  11. Goodson, A.P., Böhm, K.-H. and Winglee, R.M.: 1999, Api 524, 142.ADSGoogle Scholar
  12. Grosso, N., Montmerle, T., Feigelson, E.D. et al.: 1997, Nat 387, 56.ADSCrossRefGoogle Scholar
  13. Grosso, N., Montmerle, T., Bontemps, S., Andre, P. and Feigelson, E.D.: 2000, A&A 359, 113.ADSGoogle Scholar
  14. Hayashi, M.R., Shibata, K. and Matsumoto, R.: 1996, Api 468, L37.ADSGoogle Scholar
  15. Herbst, W., Bailer-Jones, C.A.L., Mundt, R., Meisenheimer, K. and Wackermann, R.: 2002, A&A 396, 513.ADSCrossRefGoogle Scholar
  16. Imanishi, K., Tsujimoto, M. and Koyama, K.: 2002, Api 572, 300.ADSGoogle Scholar
  17. Kastner, J.H., Huenemoerder, D.P., Schulz, N.S., Canizares, C.R. and Weintraub, D.A.: 2002, Api 567, 434.ADSGoogle Scholar
  18. Küker, M. and Rüdiger, G.: 1999, A&A 346, 922.ADSGoogle Scholar
  19. Miller, K.A. and Stone, J.M.: 1997, Api 489, 890.ADSGoogle Scholar
  20. Montmerle, T., Grosso, N., Tsuboi, Y. and Koyama, K.: 2000, Api 352, 1097.ADSGoogle Scholar
  21. Neuhäuser, R.:1997, Science 267, 1363.Google Scholar
  22. Osten, R.A., Ayres, T.R., Brown, A., Linsky, J.L. and Krishnamurthi, A.: 2003, ApJ 582, 1073.ADSCrossRefGoogle Scholar
  23. Preibisch, Th.: 1997, A&A 320, 525.ADSGoogle Scholar
  24. Preibisch, Th. and Zinnecker, H.: 2001, Ai 122, 866.ADSGoogle Scholar
  25. Preibisch, Th. and Zinnecker, H.: 2002, AJ 123, 1613.ADSCrossRefGoogle Scholar
  26. Preibisch, Th., Zinnecker, H. and Herbig, G.H.:1996, A&A 310, 456.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • Thomas Preibisch
    • 1
  1. 1.Max-Planck-Institut für RadioastronomieBonnGermany

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