Discovery of a pulsar-powered bow shock nebula in the Small Magellanic Cloud supernova remnant DEMS5

Journal article

Publication Details

Author(s): Alsaberi RZ, Maitra C, Filipović MD, Bozzetto LM, Haberl F, Maggi P, Sasaki M, Manjolović P, Velović V, Kavanagh P, Maxted NI, Urošević D, Rowell GP, Wong GF, For BQ, O'Brien AN, Galvin TJ, Staveley-Smith L, Norris RP, Jarrett T, Kothes R, Luken KJ, Hurley-Walker N, Sano H, Onić D, Dai ST, Pannuti G, Tothill NF, Crawford EJ, Yew M, Bojičić I, Dénes H, McClure-Griffiths N, Gurovich S, Fukui Y
Journal: Monthly Notices of the Royal Astronomical Society
Publication year: 2019
Volume: 486
Journal issue: 2
Pages range: 2507-2524
ISSN: 0035-8711
eISSN: 1365-2966


We report the discovery of a new Small Magellanic Cloud pulsar wind nebula (PWN) at the edge of the supernova remnant (SNR) DEMS5. The pulsar powered object has a cometary morphology similar to the Galactic PWN analogues PSR B1951+32 and 'the mouse'. It is travelling supersonically through the interstellar medium.We estimate the pulsar kick velocity to be in the range of 700-2000 km s-1 for an age between 28 and 10 kyr. The radio spectral index for this SNR-PWN-pulsar system is flat (-0.29 ± 0.01) consistent with other similar objects. We infer that the putative pulsar has a radio spectral index of -1.8, which is typical for Galactic pulsars. We searched for dispersion measures up to 1000 cm-3 pc but found no convincing candidates with an S/N greater than 8. We produce a polarization map for this PWN at 5500 MHz and find a mean fractional polarization of P ∼ 23 per cent. The X-ray power-law spectrum (τ ∼ 2) is indicative of non-thermal synchrotron emission as is expected from PWN-pulsar system. Finally, we detect DEMS5 in infrared (IR) bands. Our IR photometric measurements strongly indicate the presence of shocked gas that is expected for SNRs. However, it is unusual to detect such IR emission in an SNR with a supersonic bow shock PWN.We also find a low-velocity HI cloud of ∼107 km s-1 that is possibly interacting with DEMS5. SNR DEMS5 is the first confirmed detection of a pulsar-powered bow shock nebula found outside the Galaxy.

FAU Authors / FAU Editors

Sasaki, Manami Prof. Dr.
Professur für Multiwellenlängenastronomie

External institutions with authors

Australian National University (ANU)
Australia Telescope National Facility (ATNF)
Curtin University
Dublin Institute for Advanced Studies (DIAS)
Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics
Morehead State University
Nagoya University / 名古屋大学
National Research Council / Conseil national de recherches Canada
Universidad Nacional de Córdoba
Université de Strasbourg (UDS)
University of Adelaide
University of Belgrade / Универзитет у Београду
University of Cape Town (UCT)
University of Western Australia (UWA)
University of Western Sydney

How to cite

Alsaberi, R.Z., Maitra, C., Filipović, M.D., Bozzetto, L.M., Haberl, F., Maggi, P.,... Fukui, Y. (2019). Discovery of a pulsar-powered bow shock nebula in the Small Magellanic Cloud supernova remnant DEMS5. Monthly Notices of the Royal Astronomical Society, 486(2), 2507-2524.

Alsaberi, Rami Z.E., et al. "Discovery of a pulsar-powered bow shock nebula in the Small Magellanic Cloud supernova remnant DEMS5." Monthly Notices of the Royal Astronomical Society 486.2 (2019): 2507-2524.


Last updated on 2019-26-07 at 09:34