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.
doi:10.1086/153088.
https://resolver.caltech.edu/CaltechAUTHORS:20140409-093732830
![[img]](https://authors.library.caltech.edu/44816/1.hassmallThumbnailVersion/1974-01.pdf)  Preview |
|
PDF
- Published Version
See Usage Policy.
715kB |
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: | |
|---|
| ORCID: | |
|---|
| 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 Agency | Grant Number |
|---|
| NASA | NAS5-11066 | | NASA | NGR 05-002-160 | | National Research Council of Canada | UNSPECIFIED | | Alfred P. Sloan Foundation | UNSPECIFIED |
|
|---|
| Subject Keywords: | cosmic rays |
|---|
| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
|---|
| Space Radiation Laboratory | 1974-01 |
|
|---|
| DOI: | 10.1086/153088 |
|---|
| 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: | 10 Nov 2021 16:56 |
|---|
Repository Staff Only: item control page
