双-双射电星系的多频研究
宇宙学与河外天体物理
2009-05-05 v1
摘要
活动星系核中周期性活动的显著例证之一是双-双射电星系，它们具有来自两个不同活动周期的两对方向相反的射电瓣。我们以DDRG J1453+3308为例说明，利用GMRT和VLA在宽频率范围内的观测，可以确定内外射电瓣的频谱，估算其频谱年龄，估算周期性活动的时间尺度，并检查两个活动周期中注入谱的任何差异。低频GMRT观测还表明，双-双射电星系和三-双射电星系相当罕见。
引用
@article{arxiv.0905.0452,
title = {A Multifrequency Study of Double-Double Radio Galaxies},
author = {M. Jamrozy and C. Konar and D. J. Saikia and J. Machalski},
journal= {arXiv preprint arXiv:0905.0452},
year = {2009}
}
备注
To appear in ASP Conference Series, Vol. 407, The Low-Frequency Radio Universe, eds D. J. Saikia, D. A. Green, Y. Gupta and T. Venturi (Conference held at NCRA, Pune, India from 8th to 12th December 2008)