A deep spectroscopic study of the filamentary nebulosity in NGC 4696, the brightest cluster galaxy in the Centaurus cluster

被引：20

作者：

Canning, R. E. A. ^{[1
]}

Fabian, A. C. ^{[1
]}

Johnstone, R. M. ^{[1
]}

Sanders, J. S. ^{[1
]}

Crawford, C. S. ^{[1
]}

Ferland, G. J. ^{[2
]}

Hatch, N. A. ^{[3
]}

机构：

[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[2] Univ Kentucky, Dept Phys, Lexington, KY 40506 USA

[3] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 417卷 / 04期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

galaxies: clusters: individual: Centaurus; galaxies: individual: NGC 4696; X-RAY SPECTROSCOPY; ACTIVE GALACTIC NUCLEI; COOLING FLOW CLUSTERS; EMISSION-LINE NEBULAE; MOLECULAR-HYDROGEN; INTRACLUSTER MEDIUM; OPTICAL FILAMENTS; IFU OBSERVATIONS; PERSEUS CLUSTER; SPACE-TELESCOPE;

D O I：

10.1111/j.1365-2966.2011.19470.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results of deep integral-field spectroscopy observations using high-resolution optical (41507200 angstrom) VLT VIsible MultiObject Spectrograph spectra of NGC 4696, the dominant galaxy in the Centaurus cluster (Abell 3526). After the Virgo cluster, this is the second nearest (z= 0.0104) example of a cool-core cluster. NGC 4696 is surrounded by a vast, luminous Ha emission-line nebula (L-H alpha= 2.2 x 10(40) erg s(-1)). We explore the origin and excitation of the emission-line filaments and find their origin consistent with being drawn out, under rising radio bubbles, into the intracluster medium as in other similar systems. Contrary to previous observations, we do not observe evidence for shock excitation of the outer filaments. Our optical spectra are consistent with the recent particle heating excitation mechanism of Ferland et al.

引用

页码：3080 / 3099

页数：20

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