Enhanced HCN (1-0) emission in the type-1 Seyfert galaxy NGC 1097

被引：58

作者：

Kohno, K ^{[1
]}

Ishizuki, S

Matsushita, S

Vila-Vilaró, B

Kawabe, R

机构：

[1] Univ Tokyo, Astron Inst, Mitaka, Tokyo 1810015, Japan

[2] Natl Astron Observ, Mitaka, Tokyo 1818588, Japan

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

[4] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2003年 / 55卷 / 01期

关键词：

galaxies : active; galaxies : individual (NGC 1097); galaxies : ISM; galaxies : Seyfert; galaxies : starburst;

D O I：

10.1093/pasj/55.1.L1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The central kpc region of the low-luminosity type-1 Seyfert galaxy NGC 1097 has been observed in the CO (1-0) and HCN (1-0) lines with the Nobeyama Millimeter Array and the NRO 45 m telescope. We have found a striking enhancement of the HCN emission toward the active nucleus of NGC 1097; a large fraction of the CO emission comes from a circumnuclear starburst ring (r similar to 10" or 700 pc at D = 14.5 Mpc), whereas the HCN emission is dominated by a strong unresolved peak at the nucleus. The HCN-to-CO integrated intensity ratio on the brightness temperature scale, R-HCN/CO, is about 0.11 in the aperture of the 45 m telescope beams (15" for CO and 19" for HCN), but reaches 0.34 in the smaller aperture (10" x 4."4). These CO and HCN properties in NGC 1097 are similar to those in the type-2 Seyfert galaxies NGC 1068 and NGC 5194 (M 5 1).

引用

页码：L1 / L5

页数：5

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[1] UNIFIED MODELS FOR ACTIVE GALACTIC NUCLEI AND QUASARS [J].