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Two New X-ray/Optical/Radio Supernova Remnants in M31 | B. F. Williams
; L. O. Sjouwerman
; A. K. H. Kong
; J. D. Gelfand
; M. R. Garcia
; S. S. Murray
; | Date: |
23 Jul 2004 | Journal: | Astrophys.J. 615 (2004) 720-726 | Subject: | astro-ph | Abstract: | We compare a deep (37 ks) Chandra ACIS-S image of the M31 bulge to Local Group Survey narrow-band optical data and Very Large Array (VLA) radio data of the same region. Our precisely registered images reveal two new optical shells with X-ray counterparts. These shells have sizes, [S II]/H-alpha flux ratios, and X-ray spectral properties typical of supernova remnants (SNRs) with ages of 9$^{+3}_{-4}$ and 17$^{+6}_{-9}$ kyr. Analysis of complementary VLA data reveals the radio counterparts, further confirming that they are SNRs. We discuss and compare the properties and morphologies of these SNRs at the different wavelengths. | Source: | arXiv, astro-ph/0407507 | Services: | Forum | Review | PDF | Favorites |
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