Neutral hydrogen absorption at the centre of NGC 2146

被引：12

作者：

Tarchi, A

Greve, A

Peck, AB

Neininger, N

Wills, KA

Pedlar, A

Klein, U

机构：

[1] CNR, Inst Radioastron, I-40129 Bologna, Italy

[2] Osservatorio Astron Cagliari, I-09012 Capoterra, CA, Italy

[3] Inst Radio Astron Millimetr, F-38406 St Martin Dheres, France

[4] Harvard Smithsonian Ctr Astrophys, Submillimeter Array, Hilo, HI 96721 USA

[5] Univ Bonn, Inst Radioastron, D-53121 Bonn, Germany

[6] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[7] Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 351卷 / 01期

关键词：

galaxies : individual : NGC 2146; galaxies : ISM; galaxies : kinematics and dynamics; galaxies : starburst; radio lines : galaxies;

D O I：

10.1111/j.1365-2966.2004.07792.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present 1.4-GHz H I absorption line observations towards the starburst in NGC 2146, made with the Very Large Array and the Multi-Element Radio-Linked Interferometer Network. The H I gas has a rotating disc/ring structure with column densities between 6 and 18 x 10(21) atom cm(-2). The H I absorption has a uniform spatial and velocity distribution, and does not reveal any anomalous material concentration or velocity in the central region of the galaxy which might indicate an encounter with another galaxy or a far-evolved merger. We conclude that the signs of an encounter causing the starburst should be searched for in the outer regions of the galaxy.

引用

页码：339 / 346

页数：8

共 50 条

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