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An unusual absorption feature in the far ultraviolet spectrum of early type supergiants
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Underhill, A. B. Leckrone, D. S. West, D. K. |
| Copyright Year | 1972 |
| Description | The OAO-2 satellite has been used to obtain far ultraviolet scans of six early-type supergiants. The data reveal the presence of a distinct, broad absorption feature centered near 1720 A. This feature is unique in that it remains essentially constant in strength, breadth and central position over the spectral type range B0 I to A2 I. The feature also appears in the spectrum of the B-type shell star beta Tauri, with a strength comparable to that observed for the supergiants. It appears weakly, or not at all, in the B and A main sequence spectra we have examined. The hypothesis that the feature is due to a fortuitous blend of intrinsically strong lines arising primarily from the ground configurations of abundant metallic ions is discussed in detail. |
| File Size | 598689 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19720024187 |
| Archival Resource Key | ark:/13960/t6741j79g |
| Language | English |
| Publisher Date | 1972-01-01 |
| Access Restriction | Open |
| Subject Keyword | Space Sciences Shell Stars Far Ultraviolet Radiation Spectrum Analysis Ultraviolet Spectra Supergiant Stars Oao 2 Stellar Spectrophotometry Ultraviolet Absorption Metal Ions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
