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| DETECTION OF INTERSTELLAR PICK-UP HYDROGEN IN THE SOLAR-SYSTEM |
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| Author(s): GLOECKLER G, GEISS J, BALSIGER H, FISK LA, GALVIN AB, IPAVICH FM, OGILVIE KW, VONSTEIGER R, WILKEN B |
| Source: SCIENCE Volume: 261 Issue: 5117 Pages: 70-73 Published: JUL 2 1993 |
| Times Cited: 197 References: 21 |
| Abstract: Interstellar hydrogen ionized primarily by the solar wind has been detected by the SWICS instrument on the Ulysses spacecraft at a distance of 4.8 astronomical units from the sun. This ''pick-up'' hydrogen is identified by its distinct velocity distribution function, which drops abruptly at twice the local solar wind speed. From the measured fluxes of pick-up protons and singly charged helium, the number densities of neutral hydrogen and helium in the distant regions of the solar system are estimated to be 0.077 +/- 0.015 and 0.013 +/- 0.003 per cubic centimeter, respectively. |
| Document Type: Article |
| Language: English |
| Reprint Address: GLOECKLER, G (reprint author), UNIV MARYLAND, DEPT PHYS, COLL PK, MD 20742 USA |
Addresses:
1. UNIV BERN, INST PHYS, CH-3012 BERN, SWITZERLAND
2. NASA, OFF SPACE SCI & APPLICAT, WASHINGTON, DC 20546 USA
3. NASA, GODDARD SPACE FLIGHT CTR, GREENBELT, MD 20770 USA
4. MAX PLANCK INST AERON, W-3411 KATLENBURG DUHM, GERMANY |
| Publisher: AMER ASSOC ADVANCEMENT SCIENCE, 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: LK434 |
| ISSN: 0036-8075 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |