New candidate radio supernova remnants detected in the GLEAM survey over 345° < l < 60°, 180° < l < 240°

N. Hurley-Walker; M. D. Filipović; B. M. Gaensler; D. A. Leahy; P. J. Hancock; T. M. O. Franzen; A. R. Offringa; J. R. Callingham; L. Hindson; C. Wu; M. E. Bell; B. -Q. For; M. Johnston-Hollitt; A. D. Kapińska; J. Morgan; T. Murphy; B. McKinley; P. Procopio; L. Staveley-Smith; R. B. Wayth; Q. Zheng

doi:10.1017/pasa.2019.34

New candidate radio supernova remnants detected in the GLEAM survey over 345° < l < 60°, 180° < l < 240°

N. Hurley-Walker^*, M. D. Filipović, B. M. Gaensler, D. A. Leahy, P. J. Hancock, T. M. O. Franzen, A. R. Offringa, J. R. Callingham, L. Hindson, C. Wu, M. E. Bell, B. -Q. For, M. Johnston-Hollitt, A. D. Kapińska, J. Morgan, T. Murphy, B. McKinley, P. Procopio, L. Staveley-Smith, R. B. WaythQ. Zheng

^*Corresponding author for this work

Astronomy

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

18 Citations (Scopus)

101 Downloads (Pure)

Abstract

We have detected 27 new supernova remnants (SNRs) using a new data release of the GLEAM survey from the Murchison Widefield Array telescope, including the lowest surface brightness SNR ever detected, G 0.1 - 9.7. Our method uses spectral fitting to the radio continuum to derive spectral indices for 26/27 candidates, and our low-frequency observations probe a steeper spectrum population than previously discovered. None of the candidates have coincident WISE mid-IR emission, further showing that the emission is non-thermal. Using pulsar associations we derive physical properties for six candidate SNRs, finding G 0.1 - 9.7 may be younger than 10 kyr. Sixty per cent of the candidates subtend areas larger than 0.2 deg² on the sky, compared to < 25% of previously detected SNRs. We also make the first detection of two SNRs in the Galactic longitude range 220°-240°.

Original language	English
Article number	045
Number of pages	33
Journal	Publications of the Astronomical Society of Australia
Volume	36
DOIs	https://doi.org/10.1017/pasa.2019.34
Publication status	Published - 1-Jan-2019

Keywords

ISM: individual objects: G 0.1
9.7
G 2.1 + 2.7
G 7.4 + 0.3
G 18.9 - 1.2
G 19.1 - 3.1
G 19.7 - 0.7
G 20.1 - 0.2
G 21.8 + 0.2
G 23.1 + 0.1
G 24.0 - 0.3
G 25.3 - 1.8
G 28.3 + 0.2
G 28.7 - 0.4
G 35.3 - 0.0
G 230.4 + 1.2
G 232.1 + 2.0
G 349.1 - 0.8
G 350.7 + 0.6
G 350.8 + 5.0
G 351.0 - 0.6
G 351.4 + 0.4
G 351.4 + 0.2
G 351.9 + 0.1
G 353.0 + 0.8
G 355.4 + 2.7
G 356.5 - 1.9
G 358.3 - 0.7
ISM: supernova remnants
radio continuum: ISM
supernovae: general
Astrophysics - High Energy Astrophysical Phenomena
Astrophysics - Astrophysics of Galaxies

Access to Document

10.1017/pasa.2019.34

New candidate radio supernova remnants detected in the GLEAMsurvey over 345◦<l<60◦, 180◦<l<240◦Final publisher's version, 12.1 MBLicence: Taverne

Handle.net

Persistent link

Cite this

Hurley-Walker, N., Filipović, M. D., Gaensler, B. M., Leahy, D. A., Hancock, P. J., Franzen, T. M. O., Offringa, A. R., Callingham, J. R., Hindson, L., Wu, C., Bell, M. E., For, B. .-Q., Johnston-Hollitt, M., Kapińska, A. D., Morgan, J., Murphy, T., McKinley, B., Procopio, P., Staveley-Smith, L., ... Zheng, Q. (2019). New candidate radio supernova remnants detected in the GLEAM survey over 345° < l < 60°, 180° < l < 240°. Publications of the Astronomical Society of Australia, 36, Article 045. https://doi.org/10.1017/pasa.2019.34

@article{79534c7e41864e3c9a2af4a898c12a7f,

title = "New candidate radio supernova remnants detected in the GLEAM survey over 345° < l < 60°, 180° < l < 240°",

abstract = "We have detected 27 new supernova remnants (SNRs) using a new data release of the GLEAM survey from the Murchison Widefield Array telescope, including the lowest surface brightness SNR ever detected, G 0.1 - 9.7. Our method uses spectral fitting to the radio continuum to derive spectral indices for 26/27 candidates, and our low-frequency observations probe a steeper spectrum population than previously discovered. None of the candidates have coincident WISE mid-IR emission, further showing that the emission is non-thermal. Using pulsar associations we derive physical properties for six candidate SNRs, finding G 0.1 - 9.7 may be younger than 10 kyr. Sixty per cent of the candidates subtend areas larger than 0.2 deg2 on the sky, compared to < 25% of previously detected SNRs. We also make the first detection of two SNRs in the Galactic longitude range 220°-240°.",

keywords = "ISM: individual objects: G 0.1, 9.7, G 2.1 + 2.7, G 7.4 + 0.3, G 18.9 - 1.2, G 19.1 - 3.1, G 19.7 - 0.7, G 20.1 - 0.2, G 21.8 + 0.2, G 23.1 + 0.1, G 24.0 - 0.3, G 25.3 - 1.8, G 28.3 + 0.2, G 28.7 - 0.4, G 35.3 - 0.0, G 230.4 + 1.2, G 232.1 + 2.0, G 349.1 - 0.8, G 350.7 + 0.6, G 350.8 + 5.0, G 351.0 - 0.6, G 351.4 + 0.4, G 351.4 + 0.2, G 351.9 + 0.1, G 353.0 + 0.8, G 355.4 + 2.7, G 356.5 - 1.9, G 358.3 - 0.7, ISM: supernova remnants, radio continuum: ISM, supernovae: general, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies",

author = "N. Hurley-Walker and Filipovi{\'c}, {M. D.} and Gaensler, {B. M.} and Leahy, {D. A.} and Hancock, {P. J.} and Franzen, {T. M. O.} and Offringa, {A. R.} and Callingham, {J. R.} and L. Hindson and C. Wu and Bell, {M. E.} and For, {B. -Q.} and M. Johnston-Hollitt and Kapi{\'n}ska, {A. D.} and J. Morgan and T. Murphy and B. McKinley and P. Procopio and L. Staveley-Smith and Wayth, {R. B.} and Q. Zheng",

year = "2019",

month = jan,

day = "1",

doi = "10.1017/pasa.2019.34",

language = "English",

volume = "36",

journal = "Publications of the Astronomical Society of Australia",

issn = "1323-3580",

publisher = "Cambridge University Press",

}

Hurley-Walker, N, Filipović, MD, Gaensler, BM, Leahy, DA, Hancock, PJ, Franzen, TMO, Offringa, AR, Callingham, JR, Hindson, L, Wu, C, Bell, ME, For, B-Q, Johnston-Hollitt, M, Kapińska, AD, Morgan, J, Murphy, T, McKinley, B, Procopio, P, Staveley-Smith, L, Wayth, RB & Zheng, Q 2019, 'New candidate radio supernova remnants detected in the GLEAM survey over 345° < l < 60°, 180° < l < 240°', Publications of the Astronomical Society of Australia, vol. 36, 045. https://doi.org/10.1017/pasa.2019.34

TY - JOUR

T1 - New candidate radio supernova remnants detected in the GLEAM survey over 345° < l < 60°, 180° < l < 240°

AU - Hurley-Walker, N.

AU - Filipović, M. D.

AU - Gaensler, B. M.

AU - Leahy, D. A.

AU - Hancock, P. J.

AU - Franzen, T. M. O.

AU - Offringa, A. R.

AU - Callingham, J. R.

AU - Hindson, L.

AU - Wu, C.

AU - Bell, M. E.

AU - For, B. -Q.

AU - Johnston-Hollitt, M.

AU - Kapińska, A. D.

AU - Morgan, J.

AU - Murphy, T.

AU - McKinley, B.

AU - Procopio, P.

AU - Staveley-Smith, L.

AU - Wayth, R. B.

AU - Zheng, Q.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - We have detected 27 new supernova remnants (SNRs) using a new data release of the GLEAM survey from the Murchison Widefield Array telescope, including the lowest surface brightness SNR ever detected, G 0.1 - 9.7. Our method uses spectral fitting to the radio continuum to derive spectral indices for 26/27 candidates, and our low-frequency observations probe a steeper spectrum population than previously discovered. None of the candidates have coincident WISE mid-IR emission, further showing that the emission is non-thermal. Using pulsar associations we derive physical properties for six candidate SNRs, finding G 0.1 - 9.7 may be younger than 10 kyr. Sixty per cent of the candidates subtend areas larger than 0.2 deg2 on the sky, compared to < 25% of previously detected SNRs. We also make the first detection of two SNRs in the Galactic longitude range 220°-240°.

AB - We have detected 27 new supernova remnants (SNRs) using a new data release of the GLEAM survey from the Murchison Widefield Array telescope, including the lowest surface brightness SNR ever detected, G 0.1 - 9.7. Our method uses spectral fitting to the radio continuum to derive spectral indices for 26/27 candidates, and our low-frequency observations probe a steeper spectrum population than previously discovered. None of the candidates have coincident WISE mid-IR emission, further showing that the emission is non-thermal. Using pulsar associations we derive physical properties for six candidate SNRs, finding G 0.1 - 9.7 may be younger than 10 kyr. Sixty per cent of the candidates subtend areas larger than 0.2 deg2 on the sky, compared to < 25% of previously detected SNRs. We also make the first detection of two SNRs in the Galactic longitude range 220°-240°.

KW - ISM: individual objects: G 0.1

KW - 9.7

KW - G 2.1 + 2.7

KW - G 7.4 + 0.3

KW - G 18.9 - 1.2

KW - G 19.1 - 3.1

KW - G 19.7 - 0.7

KW - G 20.1 - 0.2

KW - G 21.8 + 0.2

KW - G 23.1 + 0.1

KW - G 24.0 - 0.3

KW - G 25.3 - 1.8

KW - G 28.3 + 0.2

KW - G 28.7 - 0.4

KW - G 35.3 - 0.0

KW - G 230.4 + 1.2

KW - G 232.1 + 2.0

KW - G 349.1 - 0.8

KW - G 350.7 + 0.6

KW - G 350.8 + 5.0

KW - G 351.0 - 0.6

KW - G 351.4 + 0.4

KW - G 351.4 + 0.2

KW - G 351.9 + 0.1

KW - G 353.0 + 0.8

KW - G 355.4 + 2.7

KW - G 356.5 - 1.9

KW - G 358.3 - 0.7

KW - ISM: supernova remnants

KW - radio continuum: ISM

KW - supernovae: general

KW - Astrophysics - High Energy Astrophysical Phenomena

KW - Astrophysics - Astrophysics of Galaxies

U2 - 10.1017/pasa.2019.34

DO - 10.1017/pasa.2019.34

M3 - Article

SN - 1323-3580

VL - 36

JO - Publications of the Astronomical Society of Australia

JF - Publications of the Astronomical Society of Australia

M1 - 045

ER -

New candidate radio supernova remnants detected in the GLEAM survey over 345° < l < 60°, 180° < l < 240°

Abstract

Keywords

Access to Document

Handle.net

Fingerprint

Cite this