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

Rami Z.E. Alsaberi; C. Maitra; M. D. Filipović; L. M. Bozzetto; F. Haberl; P. Maggi; M. Sasaki; P. Manjolović; V. Velović; P. Kavanagh; N. I. Maxted; D. Urošević; G. P. Rowell; G. F. Wong; B. Q. For; A. N. O'Brien; T. J. Galvin; L. Staveley-Smith; R. P. Norris; T. Jarrett; R. Kothes; K. J. Luken; N. Hurley-Walker; H. Sano; D. Onić; S. T. Dai; G. Pannuti; N. F.H. Tothill; E. J. Crawford; M. Yew; I. Bojičić; H. Dénes; N. McClure-Griffiths; S. Gurovich; Y. Fukui

doi:10.1093/mnras/stz971

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

Rami Z.E. Alsaberi^*, C. Maitra, M. D. Filipović, L. M. Bozzetto, F. Haberl, P. Maggi, M. Sasaki, P. Manjolović, V. Velović, P. Kavanagh, N. I. Maxted, D. Urošević, G. P. Rowell, G. F. Wong, B. Q. For, A. N. O'Brien, T. J. Galvin, L. Staveley-Smith, R. P. Norris, T. JarrettR. Kothes, K. J. Luken, N. Hurley-Walker, H. Sano, D. Onić, S. T. Dai, G. Pannuti, N. F.H. Tothill, E. J. Crawford, M. Yew, I. Bojičić, H. Dénes, N. McClure-Griffiths, S. Gurovich, Y. Fukui

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	2507-2524
Number of pages	18
Journal	Monthly Notices of the Royal Astronomical Society
Volume	486
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stz971
Publication status	Published - 1 Jun 2019

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Alsaberi, R. Z. E., Maitra, C., Filipović, M. D., Bozzetto, L. M., Haberl, F., Maggi, P., Sasaki, M., Manjolović, P., Velović, V., Kavanagh, P., Maxted, N. I., Urošević, D., Rowell, G. P., Wong, G. F., For, B. Q., O'Brien, A. N., Galvin, T. J., Staveley-Smith, L., Norris, R. 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. https://doi.org/10.1093/mnras/stz971

@article{6ba3e7f976474ec3bc1d9d831285b8cc,

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

abstract = "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.",

keywords = "ISM: individual objects: DEMS5, ISM: supernova remnants, Magellanic Clouds, radiation mechanisms: general, radio continuum: ISM.",

author = "Alsaberi, {Rami Z.E.} and C. Maitra and Filipovi{\'c}, {M. D.} and Bozzetto, {L. M.} and F. Haberl and P. Maggi and M. Sasaki and P. Manjolovi{\'c} and V. Velovi{\'c} and P. Kavanagh and Maxted, {N. I.} and D. Uro{\v s}evi{\'c} and Rowell, {G. P.} and Wong, {G. F.} and For, {B. Q.} and O'Brien, {A. N.} and Galvin, {T. J.} and L. Staveley-Smith and Norris, {R. P.} and T. Jarrett and R. Kothes and Luken, {K. J.} and N. Hurley-Walker and H. Sano and D. Oni{\'c} and Dai, {S. T.} and G. Pannuti and Tothill, {N. F.H.} and Crawford, {E. J.} and M. Yew and I. Boji{\v c}i{\'c} and H. D{\'e}nes and N. McClure-Griffiths and S. Gurovich and Y. Fukui",

note = "Publisher Copyright: {\textcopyright} 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2019",

month = jun,

day = "1",

doi = "10.1093/mnras/stz971",

language = "English",

volume = "486",

pages = "2507--2524",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press ",

number = "2",

}

Alsaberi, RZE, 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, NFH, Crawford, EJ, Yew, M, Bojičić, I, Dénes, H, McClure-Griffiths, N, Gurovich, S & 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, vol. 486, no. 2, pp. 2507-2524. https://doi.org/10.1093/mnras/stz971

TY - JOUR

T1 - Discovery of a pulsar-powered bow shock nebula in the Small Magellanic Cloud supernova remnant DEMS5

AU - Alsaberi, Rami Z.E.

AU - Maitra, C.

AU - Filipović, M. D.

AU - Bozzetto, L. M.

AU - Haberl, F.

AU - Maggi, P.

AU - Sasaki, M.

AU - Manjolović, P.

AU - Velović, V.

AU - Kavanagh, P.

AU - Maxted, N. I.

AU - Urošević, D.

AU - Rowell, G. P.

AU - Wong, G. F.

AU - For, B. Q.

AU - O'Brien, A. N.

AU - Galvin, T. J.

AU - Staveley-Smith, L.

AU - Norris, R. P.

AU - Jarrett, T.

AU - Kothes, R.

AU - Luken, K. J.

AU - Hurley-Walker, N.

AU - Sano, H.

AU - Onić, D.

AU - Dai, S. T.

AU - Pannuti, G.

AU - Tothill, N. F.H.

AU - Crawford, E. J.

AU - Yew, M.

AU - Bojičić, I.

AU - Dénes, H.

AU - McClure-Griffiths, N.

AU - Gurovich, S.

AU - Fukui, Y.

PY - 2019/6/1

Y1 - 2019/6/1

N2 - 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.

AB - 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.

KW - ISM: individual objects: DEMS5

KW - ISM: supernova remnants

KW - Magellanic Clouds

KW - radiation mechanisms: general

KW - radio continuum: ISM.

UR - http://www.scopus.com/inward/record.url?scp=85067921737&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz971

DO - 10.1093/mnras/stz971

M3 - Article

SN - 0035-8711

VL - 486

SP - 2507

EP - 2524

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

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

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