Discovery of an old, nearby, and overlooked supernova remnant centered on the southern constellation antlia pneumatica

P. R. McCullough; Brian D. Fields; Vasiliki Pavlidou

doi:10.1086/343100

Discovery of an old, nearby, and overlooked supernova remnant centered on the southern constellation antlia pneumatica

P. R. McCullough, Brian D. Fields, Vasiliki Pavlidou

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Abstract

We report the discovery of a supernova remnant (SNR) with an angular diameter of 24°, centered on the southern constellation Antlia Pneumatica. The SNR is detected well in Ha and X-rays. Within the Antlia SNR's outline, a marginally significant feature is detected in the 1.8 MeV gamma-ray line of the radioisotope ²⁶Al. At an estimated distance d_A ≃ 60-340 pc, the Antlia SNR is perhaps the nearest SNR except for the Local Bubble. Consequently, any associated neutron star or black hole is expected to have a large proper motion. Of the trajectories of nearby pulsars with well-determined proper motions, only B0950+08's passes within the SNR outline. If the SNR and the pulsar B0950+08 indeed both originated from the same supernova, then their age t = 1.8(d_A/100 pc) Myr.

Original language	English (US)
Pages (from-to)	L41-L44
Journal	Astrophysical Journal
Volume	576
Issue number	1 II
DOIs	https://doi.org/10.1086/343100
State	Published - Sep 1 2002

Keywords

Gamma rays: observations
Supernova remnants

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/343100

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title = "Discovery of an old, nearby, and overlooked supernova remnant centered on the southern constellation antlia pneumatica",

abstract = "We report the discovery of a supernova remnant (SNR) with an angular diameter of 24°, centered on the southern constellation Antlia Pneumatica. The SNR is detected well in Ha and X-rays. Within the Antlia SNR's outline, a marginally significant feature is detected in the 1.8 MeV gamma-ray line of the radioisotope 26Al. At an estimated distance dA ≃ 60-340 pc, the Antlia SNR is perhaps the nearest SNR except for the Local Bubble. Consequently, any associated neutron star or black hole is expected to have a large proper motion. Of the trajectories of nearby pulsars with well-determined proper motions, only B0950+08's passes within the SNR outline. If the SNR and the pulsar B0950+08 indeed both originated from the same supernova, then their age t = 1.8(dA/100 pc) Myr.",

keywords = "Gamma rays: observations, Supernova remnants",

author = "McCullough, {P. R.} and Fields, {Brian D.} and Vasiliki Pavlidou",

note = "Funding Information: We thank Uwe Oberlack for providing machine-readable maps of 26Al and for helpful discussions. We also thank You-Hua Chu, Jim Cordes, John Dickel, Icko Iben, Uwe Oberlack, and Beate Woermann for helpful discussions. We are grateful to the anonymous referee for constructive comments that improved this Letter. This work was supported by the Research Corporation and NSF grants AST 98-74670 and AST 00-92939.",

year = "2002",

month = sep,

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doi = "10.1086/343100",

language = "English (US)",

volume = "576",

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T1 - Discovery of an old, nearby, and overlooked supernova remnant centered on the southern constellation antlia pneumatica

AU - McCullough, P. R.

AU - Fields, Brian D.

AU - Pavlidou, Vasiliki

N1 - Funding Information: We thank Uwe Oberlack for providing machine-readable maps of 26Al and for helpful discussions. We also thank You-Hua Chu, Jim Cordes, John Dickel, Icko Iben, Uwe Oberlack, and Beate Woermann for helpful discussions. We are grateful to the anonymous referee for constructive comments that improved this Letter. This work was supported by the Research Corporation and NSF grants AST 98-74670 and AST 00-92939.

PY - 2002/9/1

Y1 - 2002/9/1

N2 - We report the discovery of a supernova remnant (SNR) with an angular diameter of 24°, centered on the southern constellation Antlia Pneumatica. The SNR is detected well in Ha and X-rays. Within the Antlia SNR's outline, a marginally significant feature is detected in the 1.8 MeV gamma-ray line of the radioisotope 26Al. At an estimated distance dA ≃ 60-340 pc, the Antlia SNR is perhaps the nearest SNR except for the Local Bubble. Consequently, any associated neutron star or black hole is expected to have a large proper motion. Of the trajectories of nearby pulsars with well-determined proper motions, only B0950+08's passes within the SNR outline. If the SNR and the pulsar B0950+08 indeed both originated from the same supernova, then their age t = 1.8(dA/100 pc) Myr.

AB - We report the discovery of a supernova remnant (SNR) with an angular diameter of 24°, centered on the southern constellation Antlia Pneumatica. The SNR is detected well in Ha and X-rays. Within the Antlia SNR's outline, a marginally significant feature is detected in the 1.8 MeV gamma-ray line of the radioisotope 26Al. At an estimated distance dA ≃ 60-340 pc, the Antlia SNR is perhaps the nearest SNR except for the Local Bubble. Consequently, any associated neutron star or black hole is expected to have a large proper motion. Of the trajectories of nearby pulsars with well-determined proper motions, only B0950+08's passes within the SNR outline. If the SNR and the pulsar B0950+08 indeed both originated from the same supernova, then their age t = 1.8(dA/100 pc) Myr.

KW - Gamma rays: observations

KW - Supernova remnants

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Discovery of an old, nearby, and overlooked supernova remnant centered on the southern constellation antlia pneumatica

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