默奇森宽场阵列对 Abell 3667 的首次观测
星系天体物理
2016-11-18 v1 天体物理仪器与方法
摘要
默奇森宽场阵列 (MWA) 是一台新的低频干涉射电望远镜，运行于西澳大利亚偏远的默奇森射电天文台。在本文中，我们展示了 MWA 对 Abell 3667 (A3667) 中众所周知的射电遗迹在 120 至 226 MHz 频段的首次观测结果。我们清晰地探测到了 A3667 中的射电遗迹，并给出了这些特征的流量估计和谱指数。在 120 至 1400 MHz 之间，西北 (NW) 和东南 (SE) 遗迹的平均谱指数为 -0.9 +/- 0.1。我们能够分辨出 NW 遗迹谱指数的空间变化，范围从 -1.7 到 -0.4，这与在更高频率下发现的结果一致。
引用
@article{arxiv.1409.2943,
title = {First Look Murchison Widefield Array observations of Abell 3667},
author = {L. Hindson and M. Johnston-Hollitt and N. Hurley-Walker and K. Buckley and J. Morgan and E. Carretti and K. S. Dwarakanath and M. Bell and G. Bernardi and N. D. R. Bhat and J. D. Bowman and F. Briggs and R. J. Cappallo and B. E. Corey and A. A. Deshpande and D. Emrich and A. Ewall-Wice and L. Feng and B. M. Gaensler and R. Goeke and L. J. Greenhill and B. J. Hazelton and D. Jacobs and D. L. Kaplan and J. C. Kasper and E. Kratzenberg and N. Kudryavtseva and E. Lenc and C. J. Lonsdale and M. J. Lynch and S. R. McWhirter and B. McKinley and D. A. Mitchell and M. F. Morales and E. Morgan and D. Oberoi and S. M. Ord and B. Pindor and T. Prabu and P. Procopio and A. R. Offringa and J. Riding and A. E. E. Rogers and A. Roshi and N. Udaya Shankar and K. S. Srivani and R. Subrahmanyan and S. J. Tingay and M. Waterson and R. B. Wayth and R. L. Webster and A. R. Whitney and A. Williams and C. L. Williams},
journal= {arXiv preprint arXiv:1409.2943},
year = {2016}
}
备注
4 pages, 4 figures, accepted for the 31st URSI General Assembly Proceedings to be published in IEEE Xplore