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 (76) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· Also-Read Articles (Reads History)
· Translate This Page
Evidence for X-ray emission from Capella
Catura, R. C.; Acton, L. W.; Johnson, H. M.
AA(Lockheed Research Laboratories, Palo Alto, Calif.), AB(Lockheed Research Laboratories, Palo Alto, Calif.), AC(Lockheed Research Laboratories, Palo Alto, Calif.)
Astrophysical Journal, vol. 196, Mar. 1, 1975, pt. 2, p. L47-L49. Research supported by the Lockheed Independent Research Program; (ApJL Homepage)
Publication Date:
Space Radiation
NASA/STI Keywords:
Binary Stars, Stellar Radiation, X Ray Astronomy, X Ray Stars, Energy Spectra, Galactic Radiation, Giant Stars, Stellar Luminosity, Stellar Spectra
Bibliographic Code:


X-ray emission in the range from 0.2 to 1.6 keV has been detected from an area of the sky which contains the binary star system Capella. The X-ray source is at most a few arc minutes in extent and shows no spectral turnover at low energy, consistent with a nearby source. We suggest Capella as the source of this emission and that this object belongs to a new class of galactic X-ray sources with a luminosity of 10 to the 31st to 10 to the 34th ergs per sec. Emission from this class of objects is variable, predominantly below 2 keV, and originates from nearby stellar objects.

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