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; T. 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, T. G. Pannuti, N. F. H. Tothill, E. J. Crawford, M. Yew, I. Bojičić, H. Dénes, N. McClure-Griffiths, S. Gurovich, Y. Fukui

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Abstract

We report the discovery of a new Small Magellanic Cloud pulsar wind nebula (PWN) at the edge of the supernova remnant (SNR) DEM"‰S5. 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"‰sâˆ’1 for an age between 28 and 10"‰kyr. The radio spectral index for this SNR-PWN-pulsar system is flat (-0.29 Ã‚Â± 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"‰cmâˆ’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 âˆ¼ 23 per"‰cent. The X-ray power-law spectrum (Î“ âˆ¼ 2) is indicative of non-thermal synchrotron emission as is expected from PWN-pulsar system. Finally, we detect DEM"‰S5 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 H"‰I cloud of âˆ¼107"‰km"‰sâˆ’1 that is possibly interacting with DEM"‰S5. SNR DEM"‰S5 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 - 2019

Keywords

Magellanic Clouds
interstellar matter
radio continuum
supernova remnants

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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{d37ee209b82544b6865c092f36aa930e,

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) DEM{"}‰S5. 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{\^a}ˆ{\textquoteright}1 for an age between 28 and 10{"}‰kyr. The radio spectral index for this SNR-PWN-pulsar system is flat (-0.29 {\~A}‚{\^A}± 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{\^a}ˆ{\textquoteright}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 {\^a}ˆ¼ 23 per{"}‰cent. The X-ray power-law spectrum ({\^I}“ {\^a}ˆ¼ 2) is indicative of non-thermal synchrotron emission as is expected from PWN-pulsar system. Finally, we detect DEM{"}‰S5 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 H{"}‰I cloud of {\^a}ˆ¼107{"}‰km{"}‰s{\^a}ˆ{\textquoteright}1 that is possibly interacting with DEM{"}‰S5. SNR DEM{"}‰S5 is the first confirmed detection of a pulsar-powered bow shock nebula found outside the Galaxy.",

keywords = "Magellanic Clouds, interstellar matter, radio continuum, supernova remnants",

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 B.-Q. For 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 Pannuti, {T. G.} 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",

year = "2019",

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, B-Q, 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, TG, 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, T. 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

Y1 - 2019

N2 - We report the discovery of a new Small Magellanic Cloud pulsar wind nebula (PWN) at the edge of the supernova remnant (SNR) DEM"‰S5. 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"‰sâˆ’1 for an age between 28 and 10"‰kyr. The radio spectral index for this SNR-PWN-pulsar system is flat (-0.29 Ã‚Â± 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"‰cmâˆ’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 âˆ¼ 23 per"‰cent. The X-ray power-law spectrum (Î“ âˆ¼ 2) is indicative of non-thermal synchrotron emission as is expected from PWN-pulsar system. Finally, we detect DEM"‰S5 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 H"‰I cloud of âˆ¼107"‰km"‰sâˆ’1 that is possibly interacting with DEM"‰S5. SNR DEM"‰S5 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) DEM"‰S5. 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"‰sâˆ’1 for an age between 28 and 10"‰kyr. The radio spectral index for this SNR-PWN-pulsar system is flat (-0.29 Ã‚Â± 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"‰cmâˆ’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 âˆ¼ 23 per"‰cent. The X-ray power-law spectrum (Î“ âˆ¼ 2) is indicative of non-thermal synchrotron emission as is expected from PWN-pulsar system. Finally, we detect DEM"‰S5 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 H"‰I cloud of âˆ¼107"‰km"‰sâˆ’1 that is possibly interacting with DEM"‰S5. SNR DEM"‰S5 is the first confirmed detection of a pulsar-powered bow shock nebula found outside the Galaxy.

KW - Magellanic Clouds

KW - interstellar matter

KW - radio continuum

KW - supernova remnants

UR - http://hdl.handle.net/1959.7/uws:52392

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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