References

1

Anders, E. and N. Grevesse, ``Abundance of the elements: meteoritic and solar,'' Geochimica and Cosmochimica Acta 53, 197, 1989.

2

Bame, S. J., A. J. Hundhausen, J. R. Asbridge, I. B. Strong, ``Solar wind ion composition,'' Phys. Rev. Lett. 20, 393, 1968.

3

Bame, S. J., J. R. Asbridge and J. T. Gosling, ``Evidence for a structure-free state at high solar wind speeds,'' J. Geophys. Res. 82, 1487, 1977.

4

Bochsler, P., J. Geiss, R. Joos, ``Kinetic temperatures of heavy ions in the solar wind,'' J. Geophys. Res. 90, 10,779, 1985.

5

Bochsler, P., J. Geiss, S. Kunz, ``Abundances of carbon, oxygen and neon in the solar wind during the period from August 1978 to June 1982,'' Solar Phys. 103, 177, 1986.

6

Bochsler, P., ``Velocity and abundance of silicon ions in the solar wind,'' J. Geophys. Res. 94, 2365, 1989.

7

Borrini, G., J. T. Gosling, S. J. Bame, W. C. Feldman, ``Solar wind helium and hydrogen structure near the heliospheric current sheet,'' J. Geophys. Res. 86, 4565, 1981.

8

Bürgi, A., ``Dynamics of alpha particles in coronal streamer type geometries,'' Solar Wind Seven, Proceedings of the 3rd COSPAR Colloqium held in Goslar, Germany, 16-20 September 1991, COSPAR Colloquia Series, Volume 3, E. Marsch and R. Schwenn, eds., Pergamon, 1992, pp. 333.

9

Burlaga, L. F., L. Klein, N. R. Sheeley, Jr., D. J. Michels, R. A. Howard, M. J. Koomen, R. Schwenn, H. Rosenbauer, ``A magnetic cloud and a coronal mass ejection,'' Geophys. Res. Lett. 9, 1317, 1982.

10

Burlaga, L. F., N. F. Ness, J. Belcher, A. Szabo, P. Isenberg and M. Lee, ``Pickup protons and pressure balanced structures: Voyager 2 observations in MIRs near 35 AU,'' J. Geophys. Res., submitted 1994.

11

Coplan, M. A., K. W. Ogilvie, P. Bochsler, J. Geiss, ``Ion composition experiment,'' IEEE Trans. Geosci. Electronics, GE-16 185, 1978.

12

Coplan, M. A., K. W. Ogilvie, P. Bochsler, J. Geiss, ``Interpretation of He abundance variations in the solar wind,'' Solar Phys., 93, 415, 1984.

13

Feldman, U. and K. G. Widing, ``Elemental abundances in the upper solar atmosphere of quiet and coronal hole regions (T 4.3 x 10 K),'' Astrophys. J. 414 , 381, 1993.

14

Feldman, U., ``Elemental abundances in the upper solar atmosphere,'' Physica Scripta 46, 202, 1992.

15

Feldman, U. and K. G. Widing, ``Photospheric abundances of oxygen, neon, and argon derived from the XUV spectrum of an impulsive flare,'' Astrophys. J. 363, 292, 1990.

16

Ferrando, P., ``Cosmic ray propagation and origin,'' Proceedings of the XXIII International Cosmic Ray Conference, Invited, Rapporteur and Highlight Papers, Calgary, Alberta, Canada, 19-30 July 1993, D. A. Leahy, R. B. Hicks, and D. Venkatesan, eds., World Scientific, 1994, pp. 279-306.

17

Galvin, A. B., G. Gloeckler, F. M. Ipavich, C. M. Shafer, J. Geiss, and K. Ogilvie, ``Solar wind composition measurements by the Ulysses SWICS experiment during transient solar wind flows,'' Adv. Space Res. 13, 75, 1993.

18

Geiss, J., F. Buhler, P. Eberhardt, C. Filleux, Apollo 16 Preliminary Science Report, NASA SP-315, 1972.

19

Geiss, J., R. von Steiger, G. Gloeckler, A. B. Galvin, ``The neon abundances in the solar wind measured by SWICS on Ulysses'' EOS 75, 278, 1994.

20

Gloeckler G. and J. Geiss, ``Observations of interstellar pickup ions,'' Cosmic Winds and the Heliosphere, in press, 1993.

21

Gloeckler, G. and J. Geiss, ``The abundances of elements and isotopes in the solar wind,'' AIP Conference Proceedings 183, Cosmic Abundance of Matter, C. J. Waddington, ed., AIP, New York, 1989, pp. 49-71.

22

Gloeckler, G., F. Ipavich, D. Hamilton, B. Wilken, W. Studemann, G. Kremser, ``Solar wind carbon, nitrogen, and oxygen abundances measured in the earth's magnetosheath with AMPTE/CCE,'' Geophys. Res. Lett. 13, 793, 1986.

23

Gloeckler, G., J. Geiss, H. Balsiger, P. Bedini, J. C. Cain, J. Fischer, L. A. Fisk, A. B. Galvin, F. Gliem, D. C. Hamilton, J. V. Hollweg, F. M. Ipavich, R. Joss, S. Livi, R. Lundgren, U. Mall, J. F. McKenzie, K. W. Ogilvie, F. Ottens, W. Rieck, E. O. Tums, R. von Steiger, W. Weiss, and B. Wilken, ``The solar wind ion composition spectrometer,'' Astron. Astrophys. Suppl. Ser. 92, 267, 1992.

24

Gosling, J. T., D. N. Baker, S. J. Bame, W. C. Feldman, R. D. Zwickl, ``Bi-directional solar wind electron heat flux events,'' J. Geophys. Res. 92, 8519, 1987.

25

Hamilton, D., G. Gloeckler, F. Ipavich, R. Lundgren, R. Sheldon, ``New high-resolution electrostatic ion mass analyzer using time of flight,'' Rev. Sci. Instrum. 61, 3104, 1990.

26

Hovestadt, D. ``Nuclear composition of solar cosmic rays,'' in Solar Wind III, C. T. Russell, ed., Institute of Geophys. and Planetary Phys., University of California, Los Angeles, 1979, pp. 2-5.

27

Hundhausen, A. J., Coronal Expansion and Solar Wind, Springer Verlag, NY, 1972.

28

Ipavich, F. M., A. B. Galvin, J. Geiss, K. W. Ogilvie and F. Gliem, ``Solar wind iron and oxygen charge states and relative abundances measured by SWICS on Ulysses,'' Solar Wind Seven, Proceedings of the 3rd COSPAR Colloqium held in Goslar, Germany, 16-20 September 1991, COSPAR Colloquia Series, Volume 3, E. Marsch and R. Schwenn, eds., Pergamon, 1992, pp. 369-373.

29

Luhmann, J. G., ``Oxygen in the heliosphere,'' J. Geophys. Res. in press, 1994.

30

Maeder, A., ``A look on non-standard solar models,'' Inside the sun, Berthomieu and Cribier, eds., Kluwer, Dordrecht, 1990, pp. 133.

31

Meyer, J. P., ``The baseline composition of solar energetic particles,'' Astrophys. J. Suppl. Ser. 57, 151, 1985.

32

Mobius, E., D. Hovestadt, B. Klecker, M. Scholer, G. Gloeckler, F. Ipavich, ``Direct observation of He pick-up ions of interstellar origin in the solar wind,'' Nature 318, 426, 1985.

33

Möbius, E., P. Bochsler, A. G. Ghielmetti, D Hamilton, ``High mass resolution isochronous time-of-flight spectrograph for three-dimensional space plasma measurements,'' Rev. Sci. Instrum. 61, 3609, 1990.

34

Neugebauer, M. and C. W. Snyder, ``Mariner 2 observations of the solar wind,'' J. Geophys. Res. 71, 4469, 1966.

35

Ogilvie, K. W., G. Gloeckler and J. Geiss, ``Neutral oxygen near Jupiter,'' Astron. Astrophys., in press 1994.

36

Ogilvie, K. W., M. A. Coplan, J. Geiss, ``Solar wind composition from sector boundary crossings and coronal mass ejections,'' Solar Wind Seven, Proceedings of the 3rd COSPAR Colloqium held in Goslar, Germany, 16-20 September 1991, COSPAR Colloquia Series, Volume 3, E. Marsch and R. Schwenn, eds., Pergamon, 1992, pp. 379-384.

37

Ogilvie, K. W., M. A. Coplan, P. Bochsler, J. Geiss, ``Solar wind observations with the ion composition instrument aboard the ISCC-3/ICE spacecraft,'' Solar Phys. 124 , 167, 1989.

38

Reames, D. V., ``Energetic particle observations and the abundances of elements in the solar corona,'' Proceedings of the First SOHO Workshop, Annapolis, Maryland, USA, 25-28 August 1992 (ESA SP-348, November 1992, pp. 315.

39

Richardson, I. G., C. J. Farrugia, D. Winterhalter, ``Solar activity and coronal mass ejections on the western hemisphere of the sun in mid-August 1989: association with interplanetary observations at the ICE and IMP 8 spacecraft,'' J. Geophys. Res. 99, 2513, 1994.

40

Schmelz, J. T. and A. Fludra, ``Absolute abundances of flaring coronal plasma derived from SMM spectral observations,'' EOS 75, 290, 1994.

41

Schmelz, J. T., ``Elemental Abundances of flaring solar plasma: enhanced neon and sulfur,'' Astrophys. J. 408, 373, 1993.

42

Schmid, J., P. Bochsler, and J. Geiss, ``Abundance of iron ions in the solar wind,'' Astrophys. J. 329, 956, 1988.

43

Shafer, C. M., G. Gloeckler, A. B. Galvin, F. M. Ipavich, J. Geiss, R. von Steiger, K. Ogilvie, ``Sulfur abundances in the solar wind measured by SWICS on Ulysses,'' Adv. Space Res. 13, 79, 1993.

44

Sheeley, N. R., T. A. Howard, M. J. Koomen, D. J. Michels, R. Schwenn, K. -H. Mulhauser, H. Rosenbauer, ``Coronal mass ejections and interplanetary shocks,'' J. Geophys. Res. 90, 163, 1985.

45

Vasyliunas, V. M. and G. Sisco, ``On the flux and the energy spectrum of interstellar ions in the solar system,'' J. Geophys. Res. 81, 1247, 1976.

46

von Steiger, R. and J. Geiss, ``Supply of fractionated gases to the corona,'' Astron. Astrophys. 225, 222, 1989.

47

von Steiger, R., J. Geiss, G. Gloeckler, H. Balsiger, A. B. Galvin, U. Mall, B. Wilken, ``Mg, C, O abundances in different solar wind flow types,'' Solar Wind Seven, Proceedings of the 3rd COSPAR Colloqium held in Goslar, Germany, 16-20 September 1991, COSPAR Colloquia Series, Volume 3, E. Marsch and R. Schwenn, eds., Pergamon, 1992, pp. 399-403.

48

Widing, K. G. and U. Feldman, ``Abundance ratios of oxygen, neon, and magnesium in solar active regions and flares: the FIP effect,'' submitted to Astrophys. J., 1994.

49

Widing, K. G., U. Feldman, A. K. Bhatia, ``The extreme-ultraviolet spectrum (300--630 Å) of an erupting prominence observed from Skylab,'' Astrophys. J. 308, 982, 1986.

50

Widing, K. G. and U. Feldman, ``Abundance variations in the outer solar atmosphere observed in Skylab spectroheliograms,'' Astrophys. J. 344, 1046, 1989.

 
Figure 1: Solar Wind Relative Abundances to Photospheric Abundances as a Function of First Ionization Potential (FIP). Note that the vaiability for elements with FIPs less sthan 10 eV is significantly larger than that for the higher FIP elements. The AMPTE data that are for coronal hole flows show a smaller overabundance below 10 eV than the other measurements.

 
Figure 2: O/Ne as a function of Ne/Mg for a variety of coronal structures. Neon and magnesium are chosen because they are representative of high and low FIP elements. The open circles are spectroscopic determinations for various structures and events in the photosphere. Determinations from SWICS, AMPTE, and the ICI are also shown. There is a good deal of scatter in the data, however the individual determinations tend to cluster about either the photosphere or coronal (SEP) values. References for the data shown are given below. The following abreviations have been used: ``SBC'' for Sector Boundary Crossing, ``Cloud'' for Magnetic Cloud, ``CME'' for Coronal Mass Ejection and ``BDS'' for Bi-Directional Streaming Events.

Table 1. Average Abundances ------------------------------------------------------------------------------- Element FIP (eV) Photo- ICI SWICS Lunar SEP Galactic sphere (Average Foils Cosmic Solar Rays Wind) (Average Solar Wind) ------------------------------------------------------------------------------- H 13.6 1175 - - - 1170 - 118 90

He 24.6115 9 75 20 - 75 55 3 - He 24.6 - 0.037 0.004 - 0.032 0.003 - - C 11.3 0.43 0.04 - 0.62 0.10 - 0.47 0.014 0.81 0.08 N 14.5 0.132 0.013 - - - 0.128 0.004 .049 0.018 O 13.6 1 1 1 1 1 1 Ne 21.6 0.144 0.038 0.17 0.02 0.10- 0.12 0.139 0.151 0.005 0.11 0.02 Mg 7.6 0.045

0.005 - 0.13 0.02 - 0.203 0.008 0.19 0.01 Si 8.2 0.042 0.005 0.12 0.04 0.18 0.02 - 0.155 0.007 0.19 0.01 S 10.4 0.019 0.003 - 0.016 0.007 - 0.036 0.001 0.022 0.003 Ar 15.8 0.004 0.001 - - 0.004 0.001 0.0033 0.0005 0.0043 0.0016 Fe 7.9 0.055 0.004 0.19 0.01 0.12 0.014 - 0.155 0.015 0.28 0.01

1. Anders and Grevesse (1989) 2. Ogilvie et al. (1989) 3. Bochsler et al. (1985) 4. Coplan et al. (1984) 5. Bochsler et al. (1986) 6. Bochsler et al. (1989) 7. Schmidt et al. (1988) 8. von Steiger et al. (1992) 9. Geiss et al. (1994) 10. Galvin et al. (1993) 11. Shafer et al. (1993) 12. Ipavich et al. (1992) 13. Geiss et al. (1972) 14. Reames (1992) 15. Ferrando (1994)

Table 2. Abundances from Various Solar Structures -------------------------------------------------------------------------------------------------------------------------------------------------------------- ICI AMPTE SEP Skylab Spectroscopy SMM Spectroscopy Element FIP (eV) Photosphere CME SBC Coronal Coronal CIR**Events Polar Flares Flares Hole Hole Coronal Active Hole Regions -------------------------------------------------------------------------------------------------------------------------------------------------------------- H 13.6 1175 118 - - - - 1810 120 - - -

He 24.6 115 9 52 65 48 45 5 159 10 - - -

He 24.6 - - - - - - - - -

C 11.3 0.43 0.04 *** *** **** 0.53 0.013 0.89 0.036 - - -

N 14.5 0.132 0.013 - - - - 0.14 0.014 - - -

O 13.6 1 1 1 1 1 1 1 1 1

Ne 21.6 0.144 0.038 0.28 0.17 0.14 - 0.17 0.016 0.14* 0.13-0.21 0.14, 0.32

Mg 7.6 0.045 0.005 0.12 0.22 0.08 0.106 0.01 0.14 0.014 0.090-0.11* 0.079-0.54 0.20, 0.21

Si 8.2 0.042 0.005 0.10 0.09 0.05 0.103 0.011 0.10 0.012 - - 0.16, 0.14

S 10.4 0.019 0.003 - - - 0.032 0.009 0.05 0.008 - - 0.036, 0.044

Ar 15.8 0.004 0.001 - - - - - - - -

Fe 7.9 0.055 0.004 - - - 0.124 0.004 0.097 0.011 - - 0.156, 0.139

1. Anders and Grevesse (1989) 2. Ogilvie et al. (1992) 3. Gloeckler et al. (1986) 4. Reames (1992) 5. Feldman and Widing (1993) 6. Widing and Feldman (1994) 7. Schmelz (1993) * Based on the assumed value of Ne/O of 0.14 ** Corotating Interaction Regions *** Constrained to 0.45 **** Constrained to 0.55

Table 3. Abundances of Pickup Ions at 5 AU Relative to He Data from Gloeckler and Geiss (1994) ------------------------------------------------------------------------------- Element Pickup Ion Flux Interstellar Solar System Abundances Abundances ------------------------------------------------------------------------------- H 0.8 0.2 6.2 0.7 10.3 He 1 1 1 C 0.4 0.8 3.7 x 10 x 10 x 10 N 0.8 x 10 0.5 x 10-3 1.1 x 10 O 5.7 x 10 3.5 x 10 8.8 x 10 Ne 1.2 x 10 1.0 x 10 1.2 x 10 -------------------------------------------------------------------------------

Figure 2. O/Ne as a function of Ne/Mg for a variety of coronal structures. Neon and magnesium are chosen because they are representative of high and low FIP elements. The open circles are spectroscopic determinations for various structures and events in the photosphere. Determinations from SWICS, AMPTE, and the ICI are also shown. There is a good deal of scatter in the data, however the individual determinations tend to cluster about either the photosphere or coronal (SEP) values. References for the data shown are given below. The following abreviations have been used: ``SBC'' for Sector Boundary Crossing, ``Cloud'' for Magnetic Cloud, ``CME'' for Coronal Mass Ejection and ``BDS'' for Bi-Directional Streaming Events. ------------------------------------------------------------------------------- Structure Instrument Reference ------------------------------------------------------------------------------- Solar Wind SWICS Geiss et al. (1994) Open Field Skylab Spectroscopy Widing and Feldman (1994) Prominence Skylab Spectroscopy Widing et al. (1986), id. (1989) Coronal Hole AMPTE Gloeckler et al. (1986) Photosphere Spectroscopy Anders and Grevesse (1989) Corona SEP Reames (1992) Impulsive Flare Skylab Spectroscopy Feldman and Widing (1990) Post Flare Limb Skylab Spectroscopy Widing and Feldman (1994) SBC, Cloud, CME, BDS ICI Ogilvie et al. (1992) ICI Average ICI Coplan et al. (1990) Limb Active Regions Skylab Spectroscopy Widing and Feldman (1994), id. (1989) Flare Decays Skylab Spectroscopy Widing and Feldman (1994), id.(1989) -------------------------------------------------------------------------------