Far-ultraviolet properties of mixed-morphology supernova remnants antlia SNR and luput loop

Abstract

In this thesis, far-ultraviolet (FUV) properties of two Mixed-Morphology supernova remnants (MM SNR)---the Lupus Loop and the Antlia SNR---were analyzed, based on the FUV observations with Far-ultraviolet IMaging Spectrograph (FIMS), also known as Spectroscopy of Plasma Evolution from Astrophysical Radiation(SPEAR), aboard the first Korean scientific satellite, $\\textit{STSAT--1}$. FIMS is a dual channel imaging spectrograph, with its wavelength coverage $900-1150$ \\AA{} and $1350-1750$ \\AA{} for the Short and Long channel, respectively. Their spectral and spatial resolutions are $\\lambda/\\Delta\\lambda\\sim550$ and $\\sim5\`$, respectively, for both channels. Several emission lines---N {\\small IV}] $\\lambda$1486, C {\\small IV} $\\lambda\\lambda$1548,1551, and Si {\\small II}$^*$ $\\lambda$1533---were detected in the Lupus Loop region, which characterize the warm and hot ionized gas in and around the region. The spatial variations in the line intensities of Si {\\small II}$^*$ and C {\\small IV} have also been studied in comparison with X-ray and dust observations. The result shows that they originate from the interface between the hot gas seen in X-rays and the cooler H I shell with which dust is associated. In addition, C {\\small IV} detected amid the hot gas may imply thermal evaporation of clouds engulfed by the hot bubble. A shock may exist up front in the interface, but its velocity should be very small, as no shock-related distinguishing feature is seen in H${\\alpha}$. More diverse emission lines were detected in the Antlia SNR: C {\\small III} $\\lambda$977, N {\\small I} $\\lambda$1135, Si {\\small II}$^*$ $\\lambda$1533, C ${\\small IV}$ $\\lambda\\lambda$1548,1551, and Al {\\small II} $\\lambda$1671. The C {\\small IV} emission line map shows a clumpy distribution of high intensity regions all over the remnant. The radial variation of C ${\\small III}$ and C ${\\small IV}$ intensities also shows non-monotonic behavior. These ob...