| タイトル | Far-ultraviolet observations of the supernova remnant N49 using the Hopkins Ultraviolet Telescope |
| 著者（英） | Vancura, Olaf; Ferguson, Henry C.; Blair, William P.; Davidsen, Arthur F.; Bowers, Charles W.; Feldman, Paul D.; Long, Knox S.; Durrance, Samuel T.; Henry, Richard C.; Dixon, W. V. D. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1992-12-10 |
| 言語 | eng |
| 内容記述 | The Hopkins Ultraviolet Telescope has been used to obtain the first sub-Lyman-alpha spectrum of an extragalactic SNR, N49, in the LMC. Emission from O VI 1032, 1038 has been detected in this spectral region. The measured fluxes of C IV, semiforbidden O IV, and O VI and the upper limit on N V provide stringent limits on the shocks responsible for the bulk of the O VI production. O VI cannot originate in the shocks with velocities of 140 km/s or less because the postshock temperature is not high enough. The nonradiative main blast wave cannot account for the brightness of the observed O VI emission. The majority of the O VI must originate in an optically faint system of shocks with velocities of 190-270 km/s and preshock densities of 20-40 cu cm. The emission from such high-velocity shocks is dominated by O VI. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 93A19781 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/321459 |
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