Discovery of x-ray emission associated with the gum nebula

D. A. Leahy; J. Nousek; G. Garmire

doi:10.1086/170962

Discovery of x-ray emission associated with the gum nebula

D. A. Leahy, J. Nousek, G. Garmire

Astronomy & Astrophysics

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9 Scopus citations

Abstract

The Gum Nebula was observed by the A-2¹ LED proportional counters on the HEAO-1 satellite as part of the all-sky survey. We report the first detection of X-ray emission associated with the Gum Nebula. Soft X-ray spectra were constructed from the A-2 LED PHA data. Single temperature Raymond-Smith models were fitted to the observed spectra to yield temperature, column density and emission measure. The temperature is ≈6 × 10⁵ K, the column density ≈4 x 10²⁰ cm^-2, and the emission measure ≪5 cm^-6 pc. The X-ray and optical properties of the Gum Nebula are consistent with a supernova remnant in the shell stage of evolution, which was the product of an energetic (3 × 10⁵¹ ergs) supernova explosion which occurred about 2 × 10⁶ yr ago.

Original language	English (US)
Pages (from-to)	561-566
Number of pages	6
Journal	Astrophysical Journal
Volume	385
Issue number	2
DOIs	https://doi.org/10.1086/170962
State	Published - Feb 1 1992

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/170962

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title = "Discovery of x-ray emission associated with the gum nebula",

abstract = "The Gum Nebula was observed by the A-21 LED proportional counters on the HEAO-1 satellite as part of the all-sky survey. We report the first detection of X-ray emission associated with the Gum Nebula. Soft X-ray spectra were constructed from the A-2 LED PHA data. Single temperature Raymond-Smith models were fitted to the observed spectra to yield temperature, column density and emission measure. The temperature is ≈6 × 105 K, the column density ≈4 x 1020 cm-2, and the emission measure ≪5 cm-6 pc. The X-ray and optical properties of the Gum Nebula are consistent with a supernova remnant in the shell stage of evolution, which was the product of an energetic (3 × 1051 ergs) supernova explosion which occurred about 2 × 106 yr ago.",

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year = "1992",

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doi = "10.1086/170962",

language = "English (US)",

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TY - JOUR

T1 - Discovery of x-ray emission associated with the gum nebula

AU - Leahy, D. A.

AU - Nousek, J.

AU - Garmire, G.

PY - 1992/2/1

Y1 - 1992/2/1

N2 - The Gum Nebula was observed by the A-21 LED proportional counters on the HEAO-1 satellite as part of the all-sky survey. We report the first detection of X-ray emission associated with the Gum Nebula. Soft X-ray spectra were constructed from the A-2 LED PHA data. Single temperature Raymond-Smith models were fitted to the observed spectra to yield temperature, column density and emission measure. The temperature is ≈6 × 105 K, the column density ≈4 x 1020 cm-2, and the emission measure ≪5 cm-6 pc. The X-ray and optical properties of the Gum Nebula are consistent with a supernova remnant in the shell stage of evolution, which was the product of an energetic (3 × 1051 ergs) supernova explosion which occurred about 2 × 106 yr ago.

AB - The Gum Nebula was observed by the A-21 LED proportional counters on the HEAO-1 satellite as part of the all-sky survey. We report the first detection of X-ray emission associated with the Gum Nebula. Soft X-ray spectra were constructed from the A-2 LED PHA data. Single temperature Raymond-Smith models were fitted to the observed spectra to yield temperature, column density and emission measure. The temperature is ≈6 × 105 K, the column density ≈4 x 1020 cm-2, and the emission measure ≪5 cm-6 pc. The X-ray and optical properties of the Gum Nebula are consistent with a supernova remnant in the shell stage of evolution, which was the product of an energetic (3 × 1051 ergs) supernova explosion which occurred about 2 × 106 yr ago.

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JO - Astrophysical Journal

JF - Astrophysical Journal

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Discovery of x-ray emission associated with the gum nebula

Abstract

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