ATCA study of Small Magellanic Cloud supernova remnant 1E 0102.2–7219

Alsaberi RZ, Filipović MD, Dai S, Sano H, Kothes R, Payne JL, Bozzetto LM, Brose R, Collischon C, Crawford EJ, Haberl F, Hill T, Kavanagh PJ, Knies J, Leahy D, Macgregor PJ, Maggi P, Maitra C, Manojlović P, Martín S, Matthew C, Ralph NO, Rowell G, Ruiter AJ, Sasaki M, Seitenzahl IR, Tokuda K, Tothill NF, Urošević D, Van Loon JT, Velović V, Vogt FP (2024)

Publication Type: Journal article

Publication year: 2024


Book Volume: 527

Pages Range: 1444-1460

Journal Issue: 1

DOI: 10.1093/mnras/stad3300


We present new and archival Australia Telescope Compact Array and Atacama Large Millimeter/submillimeter Array data of the Small Magellanic Cloud supernova remnant 1E 0102.2–7219 at 2100, 5500, 9000, and 108 000 MHz; as well as H I data provided by the Australian Square Kilometre Array Pathfinder. The remnant shows a ring-like morphology with a mean radius of 6.2 pc. The 5500 MHz image reveals a bridge-like structure, seen for the first time in a radio image. This structure is also visible in both optical and X-ray images. In the 9000 MHz image, we detect a central feature that has a flux density of 4.3 mJy but rule out a pulsar wind nebula origin, due to the lack of significant polarization towards the central feature with an upper limit of 4 per cent. The mean fractional polarization for 1E 0102.2–7219 is 7 ± 1 and 12 ± 2 per cent for 5500 and 9000 MHz, respectively. The spectral index for the entire remnant is −0.61 ± 0.01. We estimate the line-of-sight magnetic field strength in the direction of 1E 0102.2–7219 of ∼44 μG with an equipartition field of 65 ± 5 μG. This latter model uses the minimum energy of the sum of the magnetic field and cosmic ray electrons only. We detect an H I cloud towards this remnant at the velocity range of ∼160–180 km s−1 and a cavity-like structure at the velocity of 163.7–167.6 km s−1. We do not detect CO emission towards 1E 0102.2–7219.

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Alsaberi, R.Z., Filipović, M.D., Dai, S., Sano, H., Kothes, R., Payne, J.L.,... Vogt, F.P. (2024). ATCA study of Small Magellanic Cloud supernova remnant 1E 0102.2–7219. Monthly Notices of the Royal Astronomical Society, 527(1), 1444-1460.


Alsaberi, Rami Z.E., et al. "ATCA study of Small Magellanic Cloud supernova remnant 1E 0102.2–7219." Monthly Notices of the Royal Astronomical Society 527.1 (2024): 1444-1460.

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