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Title:
ROSAT Observations of Two Southern Supernova Remnants
Authors:
Seward, F. D.; Kearns, K. E.; Rhode, K. L.
Publication:
Astrophysical Journal v.471, p.887 (ApJ Homepage)
Publication Date:
11/1996
Origin:
APJ
ApJ Keywords:
ISM: SUPERNOVA REMNANTS, ISM: INDIVIDUAL ALPHANUMERIC: G327.1-1.1, ISM: INDIVIDUAL ALPHANUMERIC: G327.4+0.4, ISM: INDIVIDUAL NAME: KESTEVEN 27, X-RAYS: ISM,
DOI:
10.1086/178015
Bibliographic Code:
1996ApJ...471..887S

Abstract

The supernova remnants G327.1-1.1 and G327.4+0.4 (Kes 27) are located 1°.5 apart in the constellation Norma. In 1980, Einstein IPC observations discovered that both were irregular filled-center X-ray sources with possible point sources superposed. This paper describes new ROSAT PSPC observations which both map the diffuse structure and clearly show several unresolved sources in each field. Both remnants have bright emitting regions inside the limb which might indicate the presence of high-energy electrons accelerated by a pulsar. The interior region is more prominent in G327.1-1.1 than in Kes 27.

The spectra are relatively strongly absorbed, as expected from distant remnants close to the Galactic plane. Comparison of the X-ray and radio maps of each remnant allows us to attribute some emission to a shell and some to the interior. With this information, a blast-wave model is used to derive approximate ages and energy release. Indications are that the Kes 27 supernova deposited ˜1O51 ergs in the surrounding medium. The G327.1-1.1 event probably deposited a factor of 3-1O less.

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