A parsec-scale accelerating radio jet in the giant radio galaxy NGC 315

被引：38

作者：

Cotton, WD

Feretti, L

Giovannini, G

Lara, L

Venturi, T

机构：

[1] Natl Radio Astron Observ, Charlottesville, VA 22903 USA

[2] CNR, Ist Radioastron, I-40129 Bologna, Italy

[3] CSIC, Inst Astrofis Andalucia, Granada 18080, Spain

来源：

ASTROPHYSICAL JOURNAL | 1999年 / 519卷 / 01期

关键词：

galaxies : individual (NGC 315); galaxies : jets; galaxies : structure; radio continuum : galaxies;

D O I：

10.1086/307358

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Observations of the core of the giant radio galaxy NGC 315 made with VLBI interferometers are discussed in the context of a relativistic jet. The sidedness asymmetry suggests Doppler favoritism from a relativistic jet. The presence of moving features in the jet, as well as jet counterjet brightness ratios, hint at an accelerating, relativistic jet. An increasing jet velocity is also supported by a comparison of the jet's observed properties with the predictions of an adiabatic expansion model. On the parsec scale, the jet is unpolarized at a wavelength of 6 cm to a very high degree, in clear distinction to the high polarization seen on the kiloparsec scale.

引用

页码：108 / 116

页数：9

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