Observations of O vi Absorption from the Superbubbles of the Large Magellanic Cloud

摘要

We have presented the observations of O VI absorption at 1032 A towards 22 sightlines in 10 superbubbles (SBs) of the Large Magellanic Cloud (LMC) using the data obtained from the Far Ultraviolet Spectroscopic Explorer (FUSE). The estimated abundance of O VI in the SBs varies from a minimum of (1.09 ±0.22) ×10~(14) atoms/cm~2 in SB N206 to a maximum of (3.71±0.23)×10~(14) atoms/cm~2 in SB N70. We find about a 46% excess in the abundance of O VI in the SBs compared to the non-SB lines of sight. Even inside a SB, O VI column density (N(O VI)) varies by about a factor of 2 to 2.5. These data are useful in understanding the nature of the hot gas in SBs.