The Heliosphere in the Local Interstellar Medium: Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland
Gespeichert in:
| Weitere Verfasser: | , , |
|---|---|
| Format: | Elektronisch E-Book |
| Sprache: | English |
| Veröffentlicht: |
Dordrecht
Springer Netherlands
1996
|
| Schriftenreihe: | Space Science Series of ISSI
1 |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Beschreibung: | In summary, we can conclude that the contributions of the different ionization processes to the total ionization rate for the most abundant interstellar species are basically known. The ionization of the noble gases He and Ne is almost completely dominated by photoionization, whereas for H charge-exchange with the solar wind is most important. For other species, such as O and Ar, both processes contribute significantly. Electron impact ionization can typically contribute by '" 10% to the total rate in the inner Solar System. Because direct measurements of the solar EUV flux are not yet continuously available, the variation of the ionization rate over the solar cycle still contains a relatively large uncertainty. The recent measurements of pickup ion distributions and of the neutral helium gas provide an independent tool to determine the total ionization rate that can be used to cross calibrate with the results obtained for the individual ionization processes. Acknowledgements The authors are grateful to M. Allen for supplying us with new data on photoionization cross-sections compiled by him. We thank also M. Gruntman for drawing our attention to and support in collecting the most recent data on charge-exchange cross-sections. D. R. was supported by grant No. 2 P03C. 004. 09 from the Com mittee for Scientific Research (Poland). This work was also supported in part through NASA contract NAS7-918, NSF Grant INT-911637, NASA Grant NAGW- 2579 |
| Beschreibung: | 1 Online-Ressource (XIV, 399 p) |
| ISBN: | 9789400917828 9789401072960 |
| ISSN: | 1385-7525 |
| DOI: | 10.1007/978-94-009-1782-8 |
Internformat
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| 245 | 1 | 0 | |a The Heliosphere in the Local Interstellar Medium |b Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland |c edited by R. Steiger, R. Lallement, M. A. Lee |
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| 500 | |a In summary, we can conclude that the contributions of the different ionization processes to the total ionization rate for the most abundant interstellar species are basically known. The ionization of the noble gases He and Ne is almost completely dominated by photoionization, whereas for H charge-exchange with the solar wind is most important. For other species, such as O and Ar, both processes contribute significantly. Electron impact ionization can typically contribute by '" 10% to the total rate in the inner Solar System. Because direct measurements of the solar EUV flux are not yet continuously available, the variation of the ionization rate over the solar cycle still contains a relatively large uncertainty. The recent measurements of pickup ion distributions and of the neutral helium gas provide an independent tool to determine the total ionization rate that can be used to cross calibrate with the results obtained for the individual ionization processes. Acknowledgements The authors are grateful to M. Allen for supplying us with new data on photoionization cross-sections compiled by him. We thank also M. Gruntman for drawing our attention to and support in collecting the most recent data on charge-exchange cross-sections. D. R. was supported by grant No. 2 P03C. 004. 09 from the Com mittee for Scientific Research (Poland). This work was also supported in part through NASA contract NAS7-918, NSF Grant INT-911637, NASA Grant NAGW- 2579 | ||
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| isbn | 9789400917828 9789401072960 |
| issn | 1385-7525 |
| language | English |
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| spelling | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland edited by R. Steiger, R. Lallement, M. A. Lee Dordrecht Springer Netherlands 1996 1 Online-Ressource (XIV, 399 p) txt rdacontent c rdamedia cr rdacarrier Space Science Series of ISSI 1 1385-7525 In summary, we can conclude that the contributions of the different ionization processes to the total ionization rate for the most abundant interstellar species are basically known. The ionization of the noble gases He and Ne is almost completely dominated by photoionization, whereas for H charge-exchange with the solar wind is most important. For other species, such as O and Ar, both processes contribute significantly. Electron impact ionization can typically contribute by '" 10% to the total rate in the inner Solar System. Because direct measurements of the solar EUV flux are not yet continuously available, the variation of the ionization rate over the solar cycle still contains a relatively large uncertainty. The recent measurements of pickup ion distributions and of the neutral helium gas provide an independent tool to determine the total ionization rate that can be used to cross calibrate with the results obtained for the individual ionization processes. Acknowledgements The authors are grateful to M. Allen for supplying us with new data on photoionization cross-sections compiled by him. We thank also M. Gruntman for drawing our attention to and support in collecting the most recent data on charge-exchange cross-sections. D. R. was supported by grant No. 2 P03C. 004. 09 from the Com mittee for Scientific Research (Poland). This work was also supported in part through NASA contract NAS7-918, NSF Grant INT-911637, NASA Grant NAGW- 2579 Physics Nuclear physics Astronomy, Observations and Techniques Astrophysics and Astroparticles Nuclear Physics, Heavy Ions, Hadrons Heliosphäre (DE-588)4243903-6 gnd rswk-swf Ionisation (DE-588)4135379-1 gnd rswk-swf Heliosphäre (DE-588)4243903-6 s Ionisation (DE-588)4135379-1 s DE-604 Steiger, R. edt Lallement, R. edt Lee, M. A. edt Space Science Series of ISSI 1 (DE-604)BV013841030 1 https://doi.org/10.1007/978-94-009-1782-8 Verlag Volltext |
| spellingShingle | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland Space Science Series of ISSI Physics Nuclear physics Astronomy, Observations and Techniques Astrophysics and Astroparticles Nuclear Physics, Heavy Ions, Hadrons Heliosphäre (DE-588)4243903-6 gnd Ionisation (DE-588)4135379-1 gnd |
| subject_GND | (DE-588)4243903-6 (DE-588)4135379-1 |
| title | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland |
| title_auth | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland |
| title_exact_search | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland |
| title_full | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland edited by R. Steiger, R. Lallement, M. A. Lee |
| title_fullStr | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland edited by R. Steiger, R. Lallement, M. A. Lee |
| title_full_unstemmed | The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland edited by R. Steiger, R. Lallement, M. A. Lee |
| title_short | The Heliosphere in the Local Interstellar Medium |
| title_sort | the heliosphere in the local interstellar medium proceedings of the first issi workshop 6 10 november 1995 bern switzerland |
| title_sub | Proceedings of the First ISSI Workshop 6–10 November 1995, Bern, Switzerland |
| topic | Physics Nuclear physics Astronomy, Observations and Techniques Astrophysics and Astroparticles Nuclear Physics, Heavy Ions, Hadrons Heliosphäre (DE-588)4243903-6 gnd Ionisation (DE-588)4135379-1 gnd |
| topic_facet | Physics Nuclear physics Astronomy, Observations and Techniques Astrophysics and Astroparticles Nuclear Physics, Heavy Ions, Hadrons Heliosphäre Ionisation |
| url | https://doi.org/10.1007/978-94-009-1782-8 |
| volume_link | (DE-604)BV013841030 |
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