The knotty question of the jet of PKSB1421-490

被引：8

作者：

Gelbord, JM

Marshall, HL

Worrall, DM

Birkinshaw, M

Lovell, JEJ

Ojha, R

Godfrey, L

Schwartz, DA

Perlman, ES

Georganopoulos, M

Murphy, DW

Jauncey, DL

机构：

[1] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Univ Bristol, Dept Phys, Bristol BS8 1TL, Avon, England

[4] Commonwealth Sci & Ind Res Org, Australia Telescope Natl Facil, Epping, NSW 2122, Australia

[5] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 72611, Australia

[6] Univ Maryland Baltimore Cty, Joint Ctr Astrophys, Baltimore, MD 21250 USA

[7] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[8] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[9] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

ASTROPHYSICAL JOURNAL | 2005年 / 632卷 / 02期

关键词：

galaxies : jets; quasars : individual (PKS B1421-490);

D O I：

10.1086/497823

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of unusually strong optical and X-ray emission associated with a knot in the radio jet of PKS B1421-490. The knot is the brightest feature observed beyond the radio band, with knot/core flux ratios similar to 300 and 3.7 at optical and X-ray frequencies, respectively. We interpret the extreme optical output of the knot as synchrotron emission. The nature of the X-ray emission is unclear. We consider a second synchrotron component, inverse Compton emission from a relativistic, decelerating jet, and the possibility that this feature is a chance superposition of an unusual BL Lac object.

引用

页码：L75 / L78

页数：4

共 28 条

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