Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (68) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
· Translate This Page
Characteristics of the helium component of the local interstellar medium
Weller, C. S.; Meier, R. R.
AA(U.S. Navy, E. O. Hulburt Center for Space Research, Washington, DC), AB(U.S. Navy, E. O. Hulburt Center for Space Research, Washington, DC)
Astrophysical Journal, Part 1, vol. 246, June 1, 1981, p. 386-393. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Abundance, Helium, Interstellar Gas, Ultraviolet Spectra, Emission Spectra, Extreme Ultraviolet Radiation, Flow Velocity, Gas Density, Gas Ionization, Gas Temperature, Solar System, Spaceborne Astronomy, Ultraviolet Astronomy
Bibliographic Code:


Extreme ultraviolet instruments on the Solrad 11B satellite observed helium in the local interstellar medium (LISM) flowing through the solar system through resonantly scattered 584 A solar radiation. Since this satellite orbited the earth at 130,000 km altitude and thus was far removed from the geocoronal airglow, reliable measurements over many directions at a given time were made. As a result, these data, together with hot gas density-resonance scatter computations and previous results, permit accurate determination of quite narrow ranges of LISM velocity (22-28 km/s) and temperature (9,000-15,000 K). The derived LISM helium density of 0.011-0.027/cu cm, when compared with the derived density of the inflowing LISM hydrogen of 0.04-0.06/cu cm, suggests that the local interstellar gas is substantially ionized.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints