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X-rays from Superbubbles in the Large Magellanic Cloud IV: The Blowout Structure of N44 | | Eugene A. Magnier
; You-Hua Chu
; Sean D. Points
; Una Hwang
; R. Chris Smith
; | | Date: |
13 Jun 1996 | | Journal: | ApJ 464, 829 | | Subject: | astro-ph | | Affiliation: | U.Illinois), Una Hwang (GSFC), R. Chris Smith (U. Michigan | | Abstract: | We have used optical echelle spectra along with ROSAT and ASCA X-ray spectra to test the hypothesis that the southern portion of the N44 X-ray bright region is the result of a blowout structure. Three pieces of evidence now support this conclusion. First, the filamentary optical morphology corresponding with the location of the X-ray bright South Bar suggests the blowout description (Chu et al 1993). Second, optical echelle spectra show evidence of high velocity (~90 km/sec) gas in the region of the blowout. Third, X-ray spectral fits show a lower temperature for the South Bar than the main superbubble region of Shell 1. Such a blowout can affect the evolution of the superbubble and explain some of the discrepancy discussed by Oey & Massey (1995) between the observed shell diameter and the diameter predicted on the basis of the stellar content and Weaver et al.’s (1977) pressure-driven bubble model. | | Source: | arXiv, astro-ph/9606085 | | Services: | Forum | Review | PDF | Favorites | |
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