Far-ultraviolet (1180--1950 A) emission spectrum of Arcturus
Journal Article
·
· Astrophys. J.; (United States)
The far-ultraviolet (1180--1950 A) emission spectrum of the K2 IIIp star, Arcturus, has been obtained with a rocket-borne multichannel spectrometer. The use of multiple detectors gave an increase in effective observing time and permitted an improvement in spectral resolution over two previous rocket measurements. H I lambda1216 and O I lambda1304 are the only identified emissions, and the observed H I lambda1216 flux is low compared with previous observations. A third unidentified feature was observed at 1511 A. The absence of many lines found in emission from the Sun is striking. The absence of certain features implies that the coronal temperature must be either below 50,000 K or above 350,000 K. (AIP)
- Research Organization:
- Department of Physics, Johns Hopkins University
- OSTI ID:
- 7272742
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 205:3; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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