Multi-frequency radio-continuum study of the LMC SNR N206 (Goat's Eye) and its "zig-zag" PWN

M. Ghavam; Z. J. Smeaton; M. D. Filipović; R. Z. E. Alsaberi; C. Bordiu; W. D. Cotton; E. J. Crawford; A. M. Hopkins; R. Kothes; S. Lazarević; D. Leahy; N. Rajabpour; S. Ranasinghe; G. P. Rowell; H. Sano; M. Sasaki; D. Shobhana; K. Tsuge; D. Urošević; N. F. H. Tothill

doi:10.2298/SAJ2511027G

Multi-frequency radio-continuum study of the LMC SNR N206 (Goat's Eye) and its "zig-zag" PWN

M. Ghavam, Z. J. Smeaton, M. D. Filipović, R. Z. E. Alsaberi, C. Bordiu, W. D. Cotton, E. J. Crawford, A. M. Hopkins, R. Kothes, S. Lazarević, D. Leahy, N. Rajabpour, S. Ranasinghe, G. P. Rowell, H. Sano, M. Sasaki, D. Shobhana, K. Tsuge, D. Urošević, N. F. H. Tothill

School of Mathematical and Physical Sciences

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Abstract

We present new radio-continuum observations of the Large Magellanic Cloud (LMC) supernova remnant (SNR) N206, which we give the name “Goat’s Eye”. Goat’s Eye contains an interior radio structure that is likely a pulsar wind nebula (PWN), which we analyse in further detail. We use new radio observations from the Australia Telescope Compact Array (ATCA) telescope, as well as several archival radio observations, to calculate spectral indices, and find a steep spectral index for the whole SNR (α = −0.60±0.02), and a flatter spectral index for the PWN (α = −0.16±0.03). We also measure the polarisation and magnetic field properties of the PWN. Previously reported as a linear structure, the new observations show an unusual “zig-zag”-like structure, visible in radio-continuum total intensity, linear polarisation, and magnetic field orientations. The origin of this zig-zag structure is unclear, but we propose some origin scenarios that will require further observations to differentiate between.

Original language	English
Pages (from-to)	27-43
Number of pages	17
Journal	Serbian Astronomical Journal
Issue number	211
DOIs	https://doi.org/10.2298/SAJ2511027G
Publication status	Published - Dec 2025

Bibliographical note

© 2025 The Author(s). Published by Astronomical Observatory of Belgrade and Faculty of Mathematics, University of Belgrade. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

ISM: supernova remnants
Radio continuum: general
supernovae: general
supernovae: individual: N206 (Goat’s Eye)

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10.2298/SAJ2511027GLicence: CC BY-NC-ND

Publisher version (open access)Final published version, 3.43 MBLicence: CC BY-NC-ND

Cite this

Ghavam, M., Smeaton, Z. J., Filipović, M. D., Alsaberi, R. Z. E., Bordiu, C., Cotton, W. D., Crawford, E. J., Hopkins, A. M., Kothes, R., Lazarević, S., Leahy, D., Rajabpour, N., Ranasinghe, S., Rowell, G. P., Sano, H., Sasaki, M., Shobhana, D., Tsuge, K., Urošević, D., & Tothill, N. F. H. (2025). Multi-frequency radio-continuum study of the LMC SNR N206 (Goat's Eye) and its "zig-zag" PWN. Serbian Astronomical Journal, (211), 27-43. https://doi.org/10.2298/SAJ2511027G

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title = "Multi-frequency radio-continuum study of the LMC SNR N206 (Goat's Eye) and its {"}zig-zag{"} PWN",

abstract = "We present new radio-continuum observations of the Large Magellanic Cloud (LMC) supernova remnant (SNR) N206, which we give the name “Goat{\textquoteright}s Eye”. Goat{\textquoteright}s Eye contains an interior radio structure that is likely a pulsar wind nebula (PWN), which we analyse in further detail. We use new radio observations from the Australia Telescope Compact Array (ATCA) telescope, as well as several archival radio observations, to calculate spectral indices, and find a steep spectral index for the whole SNR (α = −0.60±0.02), and a flatter spectral index for the PWN (α = −0.16±0.03). We also measure the polarisation and magnetic field properties of the PWN. Previously reported as a linear structure, the new observations show an unusual “zig-zag”-like structure, visible in radio-continuum total intensity, linear polarisation, and magnetic field orientations. The origin of this zig-zag structure is unclear, but we propose some origin scenarios that will require further observations to differentiate between.",

keywords = "ISM: supernova remnants, Radio continuum: general, supernovae: general, supernovae: individual: N206 (Goat{\textquoteright}s Eye)",

author = "M. Ghavam and Smeaton, \{Z. J.\} and Filipovi{\'c}, \{M. D.\} and Alsaberi, \{R. Z. E.\} and C. Bordiu and Cotton, \{W. D.\} and Crawford, \{E. J.\} and Hopkins, \{A. M.\} and R. Kothes and S. Lazarevi{\'c} and D. Leahy and N. Rajabpour and S. Ranasinghe and Rowell, \{G. P.\} and H. Sano and M. Sasaki and D. Shobhana and K. Tsuge and D. Uro{\v s}evi{\'c} and Tothill, \{N. F. H.\}",

note = "{\textcopyright} 2025 The Author(s). Published by Astronomical Observatory of Belgrade and Faculty of Mathematics, University of Belgrade. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2025",

month = dec,

doi = "10.2298/SAJ2511027G",

language = "English",

pages = "27--43",

journal = "Serbian Astronomical Journal",

issn = "1450-698X",

publisher = "Astronomical Observatory",

number = "211",

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Ghavam, M, Smeaton, ZJ, Filipović, MD, Alsaberi, RZE, Bordiu, C, Cotton, WD, Crawford, EJ, Hopkins, AM, Kothes, R, Lazarević, S, Leahy, D, Rajabpour, N, Ranasinghe, S, Rowell, GP, Sano, H, Sasaki, M, Shobhana, D, Tsuge, K, Urošević, D & Tothill, NFH 2025, 'Multi-frequency radio-continuum study of the LMC SNR N206 (Goat's Eye) and its "zig-zag" PWN', Serbian Astronomical Journal, no. 211, pp. 27-43. https://doi.org/10.2298/SAJ2511027G

TY - JOUR

T1 - Multi-frequency radio-continuum study of the LMC SNR N206 (Goat's Eye) and its "zig-zag" PWN

AU - Ghavam, M.

AU - Smeaton, Z. J.

AU - Filipović, M. D.

AU - Alsaberi, R. Z. E.

AU - Bordiu, C.

AU - Cotton, W. D.

AU - Crawford, E. J.

AU - Hopkins, A. M.

AU - Kothes, R.

AU - Lazarević, S.

AU - Leahy, D.

AU - Rajabpour, N.

AU - Ranasinghe, S.

AU - Rowell, G. P.

AU - Sano, H.

AU - Sasaki, M.

AU - Shobhana, D.

AU - Tsuge, K.

AU - Urošević, D.

AU - Tothill, N. F. H.

N1 - © 2025 The Author(s). Published by Astronomical Observatory of Belgrade and Faculty of Mathematics, University of Belgrade. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2025/12

Y1 - 2025/12

N2 - We present new radio-continuum observations of the Large Magellanic Cloud (LMC) supernova remnant (SNR) N206, which we give the name “Goat’s Eye”. Goat’s Eye contains an interior radio structure that is likely a pulsar wind nebula (PWN), which we analyse in further detail. We use new radio observations from the Australia Telescope Compact Array (ATCA) telescope, as well as several archival radio observations, to calculate spectral indices, and find a steep spectral index for the whole SNR (α = −0.60±0.02), and a flatter spectral index for the PWN (α = −0.16±0.03). We also measure the polarisation and magnetic field properties of the PWN. Previously reported as a linear structure, the new observations show an unusual “zig-zag”-like structure, visible in radio-continuum total intensity, linear polarisation, and magnetic field orientations. The origin of this zig-zag structure is unclear, but we propose some origin scenarios that will require further observations to differentiate between.

AB - We present new radio-continuum observations of the Large Magellanic Cloud (LMC) supernova remnant (SNR) N206, which we give the name “Goat’s Eye”. Goat’s Eye contains an interior radio structure that is likely a pulsar wind nebula (PWN), which we analyse in further detail. We use new radio observations from the Australia Telescope Compact Array (ATCA) telescope, as well as several archival radio observations, to calculate spectral indices, and find a steep spectral index for the whole SNR (α = −0.60±0.02), and a flatter spectral index for the PWN (α = −0.16±0.03). We also measure the polarisation and magnetic field properties of the PWN. Previously reported as a linear structure, the new observations show an unusual “zig-zag”-like structure, visible in radio-continuum total intensity, linear polarisation, and magnetic field orientations. The origin of this zig-zag structure is unclear, but we propose some origin scenarios that will require further observations to differentiate between.

KW - ISM: supernova remnants

KW - Radio continuum: general

KW - supernovae: general

KW - supernovae: individual: N206 (Goat’s Eye)

UR - https://www.scopus.com/pages/publications/105027227542

U2 - 10.2298/SAJ2511027G

DO - 10.2298/SAJ2511027G

M3 - Article

AN - SCOPUS:105027227542

SN - 1450-698X

SP - 27

EP - 43

JO - Serbian Astronomical Journal

JF - Serbian Astronomical Journal

IS - 211

ER -

Multi-frequency radio-continuum study of the LMC SNR N206 (Goat's Eye) and its "zig-zag" PWN

Abstract

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Keywords

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