Details
| Original language | English |
|---|---|
| Pages (from-to) | 3579-3594 |
| Number of pages | 16 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 531 |
| Issue number | 3 |
| Early online date | 20 May 2024 |
| Publication status | Published - Jul 2024 |
Abstract
We present the description and initial results of the TRAPUM (TRAnsients And PUlsars with MeerKAT) search for pulsars associated with supernova remnants (SNRs), pulsar wind nebulae, and unidentified TeV emission. The list of sources to be targeted includes a large number of well-known candidate pulsar locations but also new candidate SNRs identified using a range of criteria. Using the 64-dish MeerKAT radio telescope, we use an interferometric beamforming technique to tile the potential pulsar locations with coherent beams which we search for radio pulsations, above a signal-to-noise of 9, down to an average flux density upper limit of 30 μJy. This limit is target-dependent due to the contribution of the sky and nebula to the system temperature. Coherent beams are arranged to overlap at their 50 per cent power radius, so the sensitivity to pulsars is not degraded by more than this amount, though realistically averages around 65 per cent if every location in the beam is considered. We report the discovery of two new pulsars; PSR J1831-0941 is an adolescent pulsar likely to be the plerionic engine of the candidate PWN G20.0+0.0, and PSR J1818-1502 appears to be an old and faint pulsar that we serendipitously discovered near the centre of a SNR already hosting a compact central object. The survey holds importance for better understanding of neutron star birth rates and the energetics of young pulsars.
Keywords
- ISM: supernova remnants, pulsars: general
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Astronomy and Astrophysics
- Earth and Planetary Sciences(all)
- Space and Planetary Science
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In: Monthly Notices of the Royal Astronomical Society, Vol. 531, No. 3, 07.2024, p. 3579-3594.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae
T2 - I. Survey description and initial discoveries
AU - Turner, J. D.
AU - Stappers, B. W.
AU - Carli, E.
AU - Barr, E. D.
AU - Becker, W.
AU - Behrend, J.
AU - Breton, R. P.
AU - Buchner, S.
AU - Burgay, M.
AU - Champion, D. J.
AU - Chen, W.
AU - Clark, C. J.
AU - Horn, D. M.
AU - Keane, E. F.
AU - Kramer, M.
AU - Künkel, L.
AU - Levin, L.
AU - Men, Y. P.
AU - Padmanabh, P. V.
AU - Ridolfi, A.
AU - Venkatraman Krishnan, V.
N1 - Publisher Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
PY - 2024/7
Y1 - 2024/7
N2 - We present the description and initial results of the TRAPUM (TRAnsients And PUlsars with MeerKAT) search for pulsars associated with supernova remnants (SNRs), pulsar wind nebulae, and unidentified TeV emission. The list of sources to be targeted includes a large number of well-known candidate pulsar locations but also new candidate SNRs identified using a range of criteria. Using the 64-dish MeerKAT radio telescope, we use an interferometric beamforming technique to tile the potential pulsar locations with coherent beams which we search for radio pulsations, above a signal-to-noise of 9, down to an average flux density upper limit of 30 μJy. This limit is target-dependent due to the contribution of the sky and nebula to the system temperature. Coherent beams are arranged to overlap at their 50 per cent power radius, so the sensitivity to pulsars is not degraded by more than this amount, though realistically averages around 65 per cent if every location in the beam is considered. We report the discovery of two new pulsars; PSR J1831-0941 is an adolescent pulsar likely to be the plerionic engine of the candidate PWN G20.0+0.0, and PSR J1818-1502 appears to be an old and faint pulsar that we serendipitously discovered near the centre of a SNR already hosting a compact central object. The survey holds importance for better understanding of neutron star birth rates and the energetics of young pulsars.
AB - We present the description and initial results of the TRAPUM (TRAnsients And PUlsars with MeerKAT) search for pulsars associated with supernova remnants (SNRs), pulsar wind nebulae, and unidentified TeV emission. The list of sources to be targeted includes a large number of well-known candidate pulsar locations but also new candidate SNRs identified using a range of criteria. Using the 64-dish MeerKAT radio telescope, we use an interferometric beamforming technique to tile the potential pulsar locations with coherent beams which we search for radio pulsations, above a signal-to-noise of 9, down to an average flux density upper limit of 30 μJy. This limit is target-dependent due to the contribution of the sky and nebula to the system temperature. Coherent beams are arranged to overlap at their 50 per cent power radius, so the sensitivity to pulsars is not degraded by more than this amount, though realistically averages around 65 per cent if every location in the beam is considered. We report the discovery of two new pulsars; PSR J1831-0941 is an adolescent pulsar likely to be the plerionic engine of the candidate PWN G20.0+0.0, and PSR J1818-1502 appears to be an old and faint pulsar that we serendipitously discovered near the centre of a SNR already hosting a compact central object. The survey holds importance for better understanding of neutron star birth rates and the energetics of young pulsars.
KW - ISM: supernova remnants
KW - pulsars: general
UR - http://www.scopus.com/inward/record.url?scp=85196118823&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2405.11899
DO - 10.48550/arXiv.2405.11899
M3 - Article
AN - SCOPUS:85196118823
VL - 531
SP - 3579
EP - 3594
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 3
ER -