Far-ultraviolet observations of the supernova remnant N49 using the Hopkins Ultraviolet Telescope

Abstract

view Abstract Citations (15) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Far-Ultraviolet Observations of the Supernova Remnant N49 Using the Hopkins Ultraviolet Telescope Vancura, Olaf ; Blair, William P. ; Long, Knox S. ; Davidsen, Arthur F. ; Bowers, Charles W. ; Dixon, W. Van Dyke ; Durrance, Samuel T. ; Feldman, Paul D. ; Ferguson, Henry C. ; Henry, Richard C. ; Kimble, Randy A. ; Kriss, Gerard A. ; Kruk, Jeffrey W. ; Moos, H. Warren Abstract Using the Hopkins Ultraviolet Telescope on the Astro-1 space shuttle mission in 1990 December, we have obtained a far-ultraviolet spectrum (912-1860 A at 3.5 A resolution) of a complex of bright filaments located in the eastern part of the supernova remnant N49 in the Large Magellanic Cloud. This is the first observation of an extragalactic supernova remnant that extends to the Lyman limit. We detect lines of O VI λ1035, O IV] λ1403, C IV λ1550, and He II λ1640. The O VI emission that we observe cannot originate in shocks with velocities <= 140 km s^-1^ which are responsible for the bulk of both the C IV and the optical line emission. Likewise, the main blast wave with a velocity ~730 km s^-1^ is unable to account for the brightness of O VI. Most of the O VI originates in optically faint, 190-270 km s^-1^ shocks, traversing clouds with densities of 20-40 cm^-3^. We expand upon earlier modeling of N49 IUE and optical spectra that assumed a distribution of shock velocities including data from below Lyα, such models still describe the data well. Publication: The Astrophysical Journal Pub Date: December 1992 DOI: 10.1086/172054 Bibcode: 1992ApJ...401..220V Keywords: Astronomical Models; Far Ultraviolet Radiation; Spaceborne Astronomy; Supernova Remnants; Carbon; Helium Ions; Magellanic Clouds; Oxygen Spectra; Astrophysics; ISM: INDIVIDUAL ALPHANUMERIC: N49; GALAXIES: MAGELLANIC CLOUDS; SHOCK WAVES; ISM: SUPERNOVA REMNANTS; ULTRAVIOLET: INTERSTELLAR full text sources ADS | data products NED (2) MAST (2) SIMBAD (1)