Published August 15, 1979
| Version v1
Journal article
Discovery of a soft X-ray flux from an Ursae Majoris
Creators
- 1. Department of Physics and Center for Space Research, Massachusetts Institute of Technology
Description
During 1975 November, the soft X-ray detectors on the SAS 3 satellite scanned across AN Ursae Majoris, a star very similar to AM Herculis in its unusual optical properties. For the first time, a soft (0.1--0.4 keV) X-ray flux averaging 2.8 x 10-11 ergs cm-2 S-1 was detected from AN UMa, as had been anticipated by analogy with Am Her. Folding the X-ray flux measurement with the known binary period reveals an X-ray light curve with approx.100% modulation, and thereby secures the identification of X-ray source as AN UMa. Unlike the case in AM Her, the X-ray minimum in AN UMa occurs midway between optical linear polarization peaks
Additional details
Publishing Information
- Journal Title
- Astrophys. J., Lett. Ed.
- Journal Volume
- 232
- Journal Issue
- 1
- Series
- Astrophys. J., Lett. Ed.
- Journal Page Range
- L21-L23
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 11515602
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- BINARY STARS; COSMIC X-RAY SOURCES; LUMINOSITY; SOFT X RADIATION; VARIABLE STARS; WHITE DWARF STARS; X-RAY SPECTRA
- Descriptors DEC
- COSMIC RAY SOURCES; DWARF STARS; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; SPECTRA; STARS; X RADIATION