Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-25T19:36:07.809Z Has data issue: false hasContentIssue false
  • English
  • Français

Stellar Activity Enhancement by Planets: Theory and Observations

Published online by Cambridge University Press:  26 May 2016

S. H. Saar ,
M. Cuntz  and
E. Shkolnik
S. H. Saar
Affiliation:
Harvard—Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
M. Cuntz
Affiliation:
Department of Physics, University of Texas at Arlington, Box 19059, Arlington, TX 76019, USA
E. Shkolnik
Affiliation:
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Rd., Vancouver, BC V6T 1Z1, Canada

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Many of the newly discovered exoplanets are gas giants in close proximity to their parent stars. Therefore, they raise tides on their host stars, and (if similar to Jupiter) will likely have substantial magnetospheres which can interact with stellar magnetic field. Both tidal and magnetospheric interactions can enhance stellar activity levels. An initial search for such planet-induced activity using the Ca ii IR triplet found no clear signal, but recently a more sensitive study using the Ca ii H and K lines has uncovered evidence for planet-enhanced emission on HD 179949, and hints of it in other systems. The phase dependence of the enhanced emission for HD 179949 suggests a magnetospheric interaction. We discuss a simple model of this interaction, the implications of this possible detection for diagnosing exoplanetary magnetospheres, and future observations.

Type
Part 7: Cool Stars and their Planets
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 355 - 366
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Baliunas, S. L., et al. 1995, ApJ, 438, 269.Google Scholar
Bastian, T. S., Dulk, G. A., & Leblanc, Y. 2000, ApJ, 545, 1058.Google Scholar
Berdyugina, S. V., & Usoskin, I. G. 2003, A&A, 405, 1121.Google Scholar
Boss, A. P. 1995, Science, 267, 360.Google Scholar
Butler, P., et al. 2002, ApJ, 578, 565.Google Scholar
Cuntz, M., Saar, S. H., & Musielak, Z. E. 2000, ApJ, 533, L151 [CSM].Google Scholar
Dikpati, M., & Charbonneau, P. 1999, ApJ, 518, 508.Google Scholar
Drake, S. A., Pravdo, S. H., Angelini, L., & Stern, R. A. 1998, AJ, 115, 2122.Google Scholar
Fischer, D. A., & Valenti, J. A. 2003, in Scientific Frontiers in Research on Extrasolar Planets, ed. Deming, D. & Seager, S., San Francisco, ASP Conf. Ser. 294, p. 117.Google Scholar
Fox, D. C., et al. 1994, A&A, 284, 91.Google Scholar
Graffagnino, V. G., Wonnacott, D., & Schaeidt, S. 1995, MNRAS, 275, 129.Google Scholar
Gray, D. F. 1992, The Observation and Analysis of Stellar Photospheres, Cambridge Astrophys. Ser. 20, Cambridge Univ. Press, Cambridge.Google Scholar
Holzwarth, V., & Schüssler, M. 2003, A&A, 405, 291.Google Scholar
Hünsch, M., Schmitt, J. H. M. M., Sterzik, M. F., Voges, W. 1999, A&AS, 135, 319.Google Scholar
Jetsu, L. 1996, A&A, 314, 153.Google Scholar
Judge, P. G., Solomon, S. C., & Ayres, T. R. 2003, ApJ, 593, 534.Google Scholar
Kuchner, M. J., & Lecar, M. 2002, ApJ, 574, L87.Google Scholar
Marcy, G. W., Butler, R. P., Fischer, D. A., & Vogt, S. S. 2003, in Scientific Frontiers in Research on Extrasolar Planets, ed. Deming, D. & Seager, S., San Francisco, ASP Conf. Ser. 294, p. 1.Google Scholar
Musielak, Z. E., Rosner, R., Stein, R. F., & Ulmschneider, P. 1994, ApJ, 423, 474.CrossRefGoogle Scholar
Musielak, Z. E., Rosner, R., & Ulmschneider, P. 1989, ApJ, 337, 470.Google Scholar
Noble, M., Musielak, Z. E., & Cuntz, M. 2002, ApJ, 572, 1024.CrossRefGoogle Scholar
Novak, G. S., Lai, D., & Lin, D. N. C. 2003, in Scientific Frontiers in Research on Extrasolar Planets, ed. Deming, D. & Seager, S., San Francisco, ASP Conf. Ser. 294, p. 177.Google Scholar
Noyes, R. W., Hartmann, L. W., Baliunas, S. L., Duncan, D. K., & Vaughan, A. H. 1984, ApJ, 279, 763.Google Scholar
Parker, E. N. 1988, ApJ, 330, 474.Google Scholar
Radick, R. R., Lockwood, G. W., Skiff, B. A., & Baliunas, S. L. 1998, ApJS, 118, 239.Google Scholar
Rubenstein, E. P., & Schaefer, B. E. 2000, ApJ, 529, 1031.Google Scholar
Rutten, R. G. M. 1987, A&A, 177, 131.Google Scholar
Saar, S. H. 2001, in Cool Stars, Stellar Systems, and the Sun, eds. García López, R. J., Rebolo, R., & Zapatero Osorio, M. R., San Francisco, ASP Conf. Ser. 223, p. 292.Google Scholar
Saar, S. H. 1996, in Magnetodynamic Phenomena in the Solar Atmosphere — Prototypes of Stellar Magnetic Activity, IAU Coll. 153, ed. Uchida, Y., Kosugi, T., & Hudson, H. S., Kluwer, Dordrecht, p. 367.Google Scholar
Saar, S. H., & Cuntz, M. 2001, MNRAS, 325, 55.CrossRefGoogle Scholar
Saar, S. H., & Osten, R. A. 1997, MNRAS, 284, 803.Google Scholar
Santos, N. C., Israelian, G., Mayor, M., Rebolo, R., & Udry, S. 2003, A&A, 398, 363.Google Scholar
Schaefer, B. E., King, J. R., & Deliyannis, C. P. 2000, ApJ, 529, 1026.Google Scholar
Schatten, K. H., Wilcox, J. M., & Ness, N. F. 1969, Solar Phys. 6, 442.Google Scholar
Schrijver, C. J., DeRosa, M. L., & Title, A. M. 2003, ApJ, 590, 493.CrossRefGoogle Scholar
Schrijver, C. J., & Zwaan, C. 1991, A&A, 251, 183.Google Scholar
Shkolnik, E., Walker, G. A. H., & Bohlender, D. A. 2001, BAAS, 33 (4), 3.04.Google Scholar
Shkolnik, E., Walker, G. A. H., & Bohlender, D. A. 2003, ApJ, 597, 1092.CrossRefGoogle Scholar
Siarkowski, M. 1996, in Stellar Surface Structure, IAU Symp. 176, ed. Strassmeier, K. G. & Linsky, J. L., Kluwer, Dordrecht, p. 469.Google Scholar
Tinney, C. G., Butler, R. P., Marcy, G. W., Jones, H. R. A., Penny, A. J., Vogt, S. S., Apps, K., Henry, G. W. 2001, ApJ, 551, 507.Google Scholar
Ulmschneider, P., & Musielak, Z. E. 1998, A&A, 338, 311.Google Scholar
White, N. E., Shafer, R. A., Horne, K., Parmar, A. N., & Culhane, J. L. 1990, ApJ, 350, 776.Google Scholar
Wood, B. E., & Linsky, J. L. 1998, ApJ, 492, 788.Google Scholar
Wood, B. E., Müller, H., Zank, G. P., & Linsky, J. L. 2002, ApJ, 574, 412.Google Scholar
Zahn, J.-P. 1977, A&A, 57, 383.Google Scholar
Zarka, P., Treumann, R. A., Ryabov, B. P., & Ryabov, V. B. 2001, Ap&SS, 277, 293.Google Scholar
Zhao, X., & Hoeksema, J. T. 1995, Adv. Space Res., 16, 181.Google Scholar