Solar Physics

, 259:323 | Cite as

In Situ Observations of Solar Wind Stream Interface Evolution

  • K. D. C. Simunac
  • L. M. Kistler
  • A. B. Galvin
  • M. A. Lee
  • M. A. Popecki
  • C. Farrugia
  • E. Moebius
  • L. M. Blush
  • P. Bochsler
  • P. Wurz
  • B. Klecker
  • R. F. Wimmer-Schweingruber
  • B. Thompson
  • J. G. Luhmann
  • C. T. Russell
  • R. A. Howard
Open Access
STEREO Science Results at Solar Minimum

Abstract

The heliocentric orbits of the two STEREO satellites are similar in radius and ecliptic latitude, with separation in longitude increasing by about 45° per year. This arrangement provides a unique opportunity to study the evolution of stream interfaces near 1 AU over time scales of hours to a few days, much less than the period of a Carrington rotation. Assuming nonevolving solar wind sources that corotate with the Sun, we calculated the expected time and longitude of arrival of stream interfaces at the Ahead observatory based on the in situ solar wind speeds measured at the Behind observatory. We find agreement to within 5° between the expected and actual arrival longitude until the spacecraft are separated by more than 20° in heliocentric inertial longitude. This corresponds to about one day between the measurement times. Much larger deviations, up to 25° in longitude, are observed after 20° separation. Some of the deviations can be explained by a latitude difference between the spacecraft, but other deviations most likely result from evolution of the source region. Both remote and in situ measurements show that changes at the source boundary can occur on a time scale much shorter than one solar rotation. In 32 of 41 cases, the interface was observed earlier than expected at STEREO/Ahead.

References

  1. Burlaga, L.F.: 1974, J. Geophys. Res. 79, 3717. CrossRefADSGoogle Scholar
  2. Galvin, A.B., Kistler, L.M., Popecki, M.A., Farrugia, C.J., Simunac, K.D.C., Ellis, L., Möbius, E., Lee, M.A., Boehm, M., Carroll, J., et al.: 2008, Space Sci. Rev. 136, 437. CrossRefADSGoogle Scholar
  3. Gosling, J.T., Asbridge, J.R., Bame, S.J., Feldman, W.C.: 1978, J. Geophys. Res. 83, 1401. CrossRefADSGoogle Scholar
  4. Gosling, J.T., Bame, S.J., McComas, D.J., Phillips, J.L., Pizzo, V.J., Goldstein, B.E., Neugebauer, M.: 1993, Geophys. Res. Lett. 20, 2789. CrossRefADSGoogle Scholar
  5. Howard, R.A., Moses, J.D., Vourlidas, A., Newmark, J.S., Socker, D.G., Plunkett, S.P., Korendyke, C.M., Cook, J.W., Hurley, A., Davila, J.M., et al.: 2008, Space Sci. Rev. 136, 67. CrossRefADSGoogle Scholar
  6. Kaiser, M.L., Kucera, T.A., Davila, J.M., St. Cyr, O.C., Guhathakurta, M., Christian, E.: 2008, Space Sci. Rev. 136, 5. CrossRefADSGoogle Scholar
  7. Krieger, A.S., Timothy, A.F., Roelof, E.C.: 1973, Solar Phys. 29, 505. CrossRefADSGoogle Scholar
  8. Lee, M.A.: 2000, J. Geophys. Res. 105, 10491. CrossRefADSGoogle Scholar
  9. Leske, R.A., Mewaldt, R.A., Mason, G.M., Cohen, C.M.S., Cummings, A.C., Davis, A.J., Labrador, A.W., Miyasaka, H., Stone, E.C., Wiedenbeck, M.E., von Rosenvinge, T.T.: 2008, In: Li, G., Hu, Q., Verkhoglyadova, O., Zank, G.P., Lin, R.P., Luhmann, J. (eds.) Proceedings of the 7th Annual Astrophysics Conference/Particle Acceleration and Transport in the Heliosphere and Beyond 1039, AIP, New York, 131. Google Scholar
  10. Luhmann, J.G., Curtis, D.W., Schroeder, P., McCauley, J., Lin, R.P., Larson, D.E., Bale, S.D., Sauvaud, J.-A., Aoustin, C., Mewaldt, R.A., et al.: 2008, Space Sci. Rev. 136, 117. CrossRefADSGoogle Scholar
  11. Mason, G.M., Desai, M.I., Mall, U., Korth, A., Bucik, R., von Rosenvinge, T.T., Simunac, K.D.: 2009, Solar Phys. 256, 393. CrossRefADSGoogle Scholar
  12. Neugebauer, M., Snyder, C.W.: 1966, J. Geophys. Res. 71, 4469. ADSGoogle Scholar
  13. Neugebauer, M., Forsyth, R.J., Galvin, A.B., Harvey, K.L., Hoeksema, J.T., Lazarus, A.J., Lepping, R.P., Linker, J.A., Mikic, Z., Steinberg, J.T., et al.: 1998, J. Geophys. Res. 103, 14587. CrossRefADSGoogle Scholar
  14. Neugebauer, M., Liewer, P.C., Smith, E.J., Skoug, R.M., Zurbuchen, T.H.: 2002, J. Geophys. Res. 107, 1488. CrossRefGoogle Scholar
  15. Newton, H.W., Nunn, M.L.: 1951, Mon. Not. Roy. Astron. Soc. 111, 413. ADSGoogle Scholar
  16. Nolte, J.T., Roelof, E.C.: 1973a, Solar Phys. 33, 241. CrossRefADSGoogle Scholar
  17. Nolte, J.T., Roelof, E.C.: 1973b, Solar Phys. 33, 483. CrossRefADSGoogle Scholar
  18. Nolte, J.T., Krieger, A.S., Timothy, A.F., Gold, R.E., Roelof, E.C., Vaiana, G., Lazarus, A.J., Sullivan, J.D., McIntosh, P.S.: 1976, Solar Phys. 46, 303. CrossRefADSGoogle Scholar
  19. Schwenn, R.: 1990, In: Schwenn, R., Marsch, E. (eds.) Physics of the Inner Heliosphere I, Springer, Berlin, 99. Google Scholar
  20. Smith, C.W., Bieber, J.W.: 1991, Astrophys. J. 370, 435. CrossRefADSGoogle Scholar
  21. Timothy, A.F., Krieger, A.S., Vaiana, G.S.: 1975, Solar Phys. 42, 135. CrossRefADSGoogle Scholar
  22. Wang, Y.-M., Sheeley, N.R.: 1990, Astrophys. J. 355, 726. CrossRefADSGoogle Scholar
  23. Wang, Y.-M., Sheeley, N.R.: 1993, Astrophys. J. 414, 916. CrossRefADSGoogle Scholar
  24. Wimmer-Schweingruber, R.F., von Steiger, R., Paerli, R.: 1997, J. Geophys. Res. 102, 17407. CrossRefADSGoogle Scholar

Copyright information

© The Author(s) 2009

Authors and Affiliations

  • K. D. C. Simunac
    • 1
  • L. M. Kistler
    • 1
  • A. B. Galvin
    • 1
  • M. A. Lee
    • 1
  • M. A. Popecki
    • 1
  • C. Farrugia
    • 1
  • E. Moebius
    • 1
  • L. M. Blush
    • 2
  • P. Bochsler
    • 1
    • 2
  • P. Wurz
    • 2
  • B. Klecker
    • 3
  • R. F. Wimmer-Schweingruber
    • 4
  • B. Thompson
    • 5
  • J. G. Luhmann
    • 6
  • C. T. Russell
    • 7
  • R. A. Howard
    • 8
  1. 1.University of New Hampshire Space Science CenterDurhamUSA
  2. 2.Physikalisches InstitutUniversity of BernBernSwitzerland
  3. 3.Max-Planck Institut für Extraterrestrische PhysikGarchingGermany
  4. 4.Institute for Experimental and Applied PhysicsUniversity of KielKielGermany
  5. 5.NASA Goddard Space Flight CenterGreenbeltUSA
  6. 6.Space Sciences LaboratoryUniversity of CaliforniaBerkeleyUSA
  7. 7.Institute of Geophysics and Planetary PhysicsUniversity of CaliforniaLos AngelesUSA
  8. 8.E.O. Hulburt Center for Space ResearchNaval Research LaboratoryWashingtonUSA

Personalised recommendations