Abstract
A Chandra observation has defined the extent of the SNR 0454-67.2 in the LMC H II region N9. The remnant has dimension 2.′3 × 3.′6 and is elongated in the north-south direction. The brightest emission comes from a north-south central ridge that includes three bright patches. There is good agreement between X-ray and [O II] and [S II] morphology. The remnant is old enough so that optical data give more information about dynamics than do the X-ray data. The supernova (SN) energy release was ≥5 × 1050 ergs, and the age is ∼3 × 104 yr. There are several unresolved sources nearby, but none are clearly associated with the remnant. The X-ray spectrum is soft and indicates enhanced Fe abundance in the central region, consistent with a Type Ia SN origin, but a Type II origin cannot be ruled out.
Original language | English (US) |
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Pages (from-to) | 327-334 |
Number of pages | 8 |
Journal | Astrophysical Journal |
Volume | 640 |
Issue number | 1 I |
DOIs | |
State | Published - Mar 20 2006 |
Keywords
- ISM: Individual (SNR 0454-67.2)
- Supernova remnants
- X-rays: ISM
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science