Limits on radio emission from meteors using the MWA
Zhang, X.1,2,3,4; Hancock, P.3,4; Devillepoix, H. A. R.5; Wayth, R. B.3,4; Beardsley, A.6; Crosse, B.3; Emrich, D.3; Franzen, T. M. O.3; Gaensler, B. M.4,7,8; Horsley, L.3; Johnston-Hollitt, M.3,9; Kaplan, D. L.10; Kenney, D.3; Morales, M. F.11; Pallot, D.12; Steele, K.3; Tingay, S. J.3,4; Trott, C. M.3,4,13; Walker, M.3; Williams, A.3; Wu, C.12; Ji, Jianghui1; Ma, Yuehua1

Recently, low-frequency, broad-band radio emission has been observed accompanying bright meteors by the Long Wavelength Array (LWA). The broad-band spectra between 20 and 60MHz were captured for several events, while the spectral index (dependence of flux density on frequency, with S-nu proportional to nu(alpha)) was estimated to be -4 +/- 1 during the peak of meteor afterglows. Here we present a survey of meteor emission and other transient events using the Murchison Wide Field Array (MWA) at 72-103 MHz. In our 322 h survey, down to a 5 sigma detection threshold of 3.5 Jy beam(-1), no transient candidates were identified as intrinsic emission from meteors. We derived an upper limit of -3.7 (95 per cent confidence limit) on the spectral index in our frequency range. We also report detections of other transient events, such as reflected FM broadcast signals from small satellites, conclusively demonstrating the ability of the MWA to detect and track space debris on scales as small as 0.1 m in low Earth orbits.

Keywordplasmas instrumentation: interferometers meteorites, meteors, meteoroids
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000435630100067
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorZhang, X.; Hancock, P.
Affiliation1.Chinese Acad Sci, Purple Mt Observ, CAS Key Lab Planetary Sci, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia
4.ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW 2006, Australia
5.Curtin Univ, Sch Earth & Planetary Sci, Bentley, WA 6102, Australia
6.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA
7.Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia
8.Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 1A1, Canada
9.Peripety Sci Ltd, POB 11355 Manners St, Wellington 6142, New Zealand
10.Univ Wisconsin Milwaukee, Dept Phys, Milwaukee, WI 53201 USA
11.Univ Washington, Dept Phys, Seattle, WA 98195 USA
12.Univ Western Australia, Int Ctr Radio Astron Res, Crawley, WA 6009, Australia
13.ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Bentley, WA 6102, Australia
Recommended Citation
GB/T 7714
Zhang, X.,Hancock, P.,Devillepoix, H. A. R.,et al. Limits on radio emission from meteors using the MWA[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,477(4):5167-5176.
APA Zhang, X..,Hancock, P..,Devillepoix, H. A. R..,Wayth, R. B..,Beardsley, A..,...&Ma, Yuehua.(2018).Limits on radio emission from meteors using the MWA.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,477(4),5167-5176.
MLA Zhang, X.,et al."Limits on radio emission from meteors using the MWA".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 477.4(2018):5167-5176.
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