Limits on radio emission from meteors using the MWA
Limits on radio emission from meteors using the MWA
复制标题
使用 MWA 对流星无线电发射的限制
DOI：
10.1093/mnras/sty930
复制
发表时间：
2018-04
影响因子：
4.8
通讯作者：
Ma Yuehua
中科院分区：
文献类型：
--
作者：
Zhang X;Hancock P;Devillepoix H A R;Wayth R B;Beardsley A;Crosse B;Emrich D;Franzen T M O;Gaensler B M;Horsley L;Johnston Hollitt M;Kaplan D L;Kenney D;Morales M F;Pallot D;Steele K;Tingay S J;Trott C M;Walker M;Williams A;Wu C;Ji Jianghui;Ma Yuehua
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.
登录
查看更多内容
影响因子：
1.6
作者：
J. Helmboldt;Steven W. Ellingson;J. Hartman;T. Lazio;G. B. Taylor;Thomas L. Wilson;C. Wolfe
通讯作者：
J. Helmboldt;Steven W. Ellingson;J. Hartman;T. Lazio;G. B. Taylor;Thomas L. Wilson;C. Wolfe
影响因子：
1.6
作者：
A. Sutinjo;J. O'Sullivan;E. Lenc;R. Wayth;S. Padhi;P. Hall;S. Tingay
通讯作者：
A. Sutinjo;J. O'Sullivan;E. Lenc;R. Wayth;S. Padhi;P. Hall;S. Tingay
DOI：
10.1002/2015ja021229
发表时间：
2015-10
期刊：
Journal of Geophysical Research: Space Physics
影响因子：
--
作者：
K. Obenberger;G. Taylor;Chin S. Lin;J. Dowell;F. Schinzel;K. Stovall
通讯作者：
K. Obenberger;G. Taylor;Chin S. Lin;J. Dowell;F. Schinzel;K. Stovall
DOI：
10.1142/s2251171712500043
发表时间：
2012-06
期刊：
--
影响因子：
--
作者：
G. Taylor;S. Ellingson;N. Kassim;J. Craig;J. Dowell;C. Wolfe;J. Hartman;G. Bernardi;T. Clarke-T.
通讯作者：
G. Taylor;S. Ellingson;N. Kassim;J. Craig;J. Dowell;C. Wolfe;J. Hartman;G. Bernardi;T. Clarke-T.
DOI：
--
发表时间：
2014
期刊：
--
影响因子：
--
作者：
P. Prasad;S. Wijnholds;F. Huizinga;R. Wijers
通讯作者：
P. Prasad;S. Wijnholds;F. Huizinga;R. Wijers