CaltechAUTHORS
  A Caltech Library Service

The Energy Spectrum of 0.16 to 2 MeV Electrons During Solar Quiet Times

Hurford, G. J. and Mewaldt, R. A. and Stone, E. C. and Vogt, R. E. (1974) The Energy Spectrum of 0.16 to 2 MeV Electrons During Solar Quiet Times. Astrophysical Journal, 192 . pp. 541-546. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20140409-093732830

[img]
Preview
PDF - Published Version
See Usage Policy.

698Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140409-093732830

Abstract

New observations of the quiet-time energy spectrum of 0.16- to 2-MeV electrons have been made with the Caltech Electron/Isotope Spectrometer which was launched on IMP-7 in September 1972. Earlier measurements of quiet-time electrons in this energy range by other groups have resulted in spectra differing by more than an order of magnitude in intensity. A minimum quiet-time flux level somewhat lower than the lowest previously reported spectra and consistent with an extrapolation of the spectrum measured at higher energies is found. A galactic secondary source of knock-on electrons is consistent with these results and with independent studies of the interstellar spectra of cosmic-ray nuclei, provided that solar modulation does not suppress the 0.16- to 2-MeV electron flux by more than a factor of about 3. Although not required, other recently suggested sources may also contribute to the observed fluxes.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/153088DOIArticle
http://adsabs.harvard.edu/doi/10.1086/153088ADSArticle
ORCID:
AuthorORCID
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Contact Email Address:dmiles@caltech.edu
Additional Information:© 1974. The American Astronomical Society. Received 1974 February 12. Dr. J. E. Lupton and W. E. Althouse made significant contributions to the design and development of the Electron/Isotope Spectrometer. This work was supported in part by the National Aeronautics and Space Administration under contract NAS5-11066 and grant NGR 05-002-160. One of us (G. J. H.) received support from the National Research Council of Canada while another (E. C. S.) was an Alfred P. Sloan research fellow during this period.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAS5-11066
NASANGR 05-002-160
National Research Council of CanadaUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Subject Keywords:cosmic rays
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1974-01
Record Number:CaltechAUTHORS:20140409-093732830
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140409-093732830
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44816
Collection:CaltechAUTHORS
Deposited By: SWORD User
Deposited On:11 Apr 2014 19:05
Last Modified:20 Feb 2020 14:33

Repository Staff Only: item control page