Detection of magnesium-rich ejecta in the middle-aged supernova remnant N49B

Sangwook Park; John P. Hughes; Patrick O. Slane; David N. Burrows; Jessica S. Warren; Gordon P. Garmire; John A. Nousek

doi:10.1086/377507

Detection of magnesium-rich ejecta in the middle-aged supernova remnant N49B

Sangwook Park, John P. Hughes, Patrick O. Slane, David N. Burrows, Jessica S. Warren, Gordon P. Garmire, John A. Nousek

Astronomy & Astrophysics

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33 Scopus citations

Abstract

The middle-aged supernova remnant (SNR) N49B in the Large Magellanic Cloud has been observed with the Chandra X-Ray Observatory. The superb angular resolution of Chandra resolves the complex structure of X-ray-emitting filaments across the SNR. All observed features are soft (E < 3 keV), and we find no evidence of either pointlike or extended hard emission within the SNR. Spectral lines from O, Ne, Mg, Si, S, and Fe are present. Equivalent width images for the detected elemental species and spatially resolved spectral analysis reveal the presence of Mg-rich ejecta within the SNR. We find no such enrichment in O or Ne, which may reflect details of the nucleosynthesis process or the heating and cooling of the ejecta as it evolved. The bright circumferential filaments are emission from the shocked dense interstellar medium (ISM). We detect faint diffuse X-ray emission that extends beyond the X-ray-bright filaments toward the west and southeast. These features appear to be the blast wave shock front expanding into lower density portions of the ISM seen in projection. We set an upper limit of ∼2 × 10³³ ergs s^-1 on the 0.5-5 keV band X-ray luminosity of any embedded compact object.

Original language	English (US)
Pages (from-to)	L41-L44
Journal	Astrophysical Journal
Volume	592
Issue number	1 II
DOIs	https://doi.org/10.1086/377507
State	Published - Jul 20 2003

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/377507

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title = "Detection of magnesium-rich ejecta in the middle-aged supernova remnant N49B",

abstract = "The middle-aged supernova remnant (SNR) N49B in the Large Magellanic Cloud has been observed with the Chandra X-Ray Observatory. The superb angular resolution of Chandra resolves the complex structure of X-ray-emitting filaments across the SNR. All observed features are soft (E < 3 keV), and we find no evidence of either pointlike or extended hard emission within the SNR. Spectral lines from O, Ne, Mg, Si, S, and Fe are present. Equivalent width images for the detected elemental species and spatially resolved spectral analysis reveal the presence of Mg-rich ejecta within the SNR. We find no such enrichment in O or Ne, which may reflect details of the nucleosynthesis process or the heating and cooling of the ejecta as it evolved. The bright circumferential filaments are emission from the shocked dense interstellar medium (ISM). We detect faint diffuse X-ray emission that extends beyond the X-ray-bright filaments toward the west and southeast. These features appear to be the blast wave shock front expanding into lower density portions of the ISM seen in projection. We set an upper limit of ∼2 × 1033 ergs s-1 on the 0.5-5 keV band X-ray luminosity of any embedded compact object.",

author = "Sangwook Park and Hughes, {John P.} and Slane, {Patrick O.} and Burrows, {David N.} and Warren, {Jessica S.} and Garmire, {Gordon P.} and Nousek, {John A.}",

note = "Funding Information: This work has been supported in part by NASA contract NAS8-01128. J. P. H. was supported by Chandra grants GO1-2052X, GO2-3068X, and GO2-3080B. P. O. S. was supported by NASA contract NAS8-39073. We thank the anonymous referee for his/her comments that improved the Letter.",

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T1 - Detection of magnesium-rich ejecta in the middle-aged supernova remnant N49B

AU - Park, Sangwook

AU - Hughes, John P.

AU - Slane, Patrick O.

AU - Burrows, David N.

AU - Warren, Jessica S.

AU - Garmire, Gordon P.

AU - Nousek, John A.

N1 - Funding Information: This work has been supported in part by NASA contract NAS8-01128. J. P. H. was supported by Chandra grants GO1-2052X, GO2-3068X, and GO2-3080B. P. O. S. was supported by NASA contract NAS8-39073. We thank the anonymous referee for his/her comments that improved the Letter.

PY - 2003/7/20

Y1 - 2003/7/20

N2 - The middle-aged supernova remnant (SNR) N49B in the Large Magellanic Cloud has been observed with the Chandra X-Ray Observatory. The superb angular resolution of Chandra resolves the complex structure of X-ray-emitting filaments across the SNR. All observed features are soft (E < 3 keV), and we find no evidence of either pointlike or extended hard emission within the SNR. Spectral lines from O, Ne, Mg, Si, S, and Fe are present. Equivalent width images for the detected elemental species and spatially resolved spectral analysis reveal the presence of Mg-rich ejecta within the SNR. We find no such enrichment in O or Ne, which may reflect details of the nucleosynthesis process or the heating and cooling of the ejecta as it evolved. The bright circumferential filaments are emission from the shocked dense interstellar medium (ISM). We detect faint diffuse X-ray emission that extends beyond the X-ray-bright filaments toward the west and southeast. These features appear to be the blast wave shock front expanding into lower density portions of the ISM seen in projection. We set an upper limit of ∼2 × 1033 ergs s-1 on the 0.5-5 keV band X-ray luminosity of any embedded compact object.

AB - The middle-aged supernova remnant (SNR) N49B in the Large Magellanic Cloud has been observed with the Chandra X-Ray Observatory. The superb angular resolution of Chandra resolves the complex structure of X-ray-emitting filaments across the SNR. All observed features are soft (E < 3 keV), and we find no evidence of either pointlike or extended hard emission within the SNR. Spectral lines from O, Ne, Mg, Si, S, and Fe are present. Equivalent width images for the detected elemental species and spatially resolved spectral analysis reveal the presence of Mg-rich ejecta within the SNR. We find no such enrichment in O or Ne, which may reflect details of the nucleosynthesis process or the heating and cooling of the ejecta as it evolved. The bright circumferential filaments are emission from the shocked dense interstellar medium (ISM). We detect faint diffuse X-ray emission that extends beyond the X-ray-bright filaments toward the west and southeast. These features appear to be the blast wave shock front expanding into lower density portions of the ISM seen in projection. We set an upper limit of ∼2 × 1033 ergs s-1 on the 0.5-5 keV band X-ray luminosity of any embedded compact object.

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Detection of magnesium-rich ejecta in the middle-aged supernova remnant N49B

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