On the nature of the X-ray absorption in the Seyfert 2 galaxy NGC 4507

被引：19

作者：

Comastri, A

Vignali, C

Cappi, M

Matt, G

Audano, R

Awaki, H

Ueno, S

机构：

[1] Osservatorio Astron Bologna, I-40126 Bologna, Italy

[2] Univ Bologna, Dipartimento Astron, I-40126 Bologna, Italy

[3] CNR, Ist Tecnol & Studio Radiazioni Extraterrestre, I-40129 Bologna, Italy

[4] RIKEN, Inst Phys & Chem Res, Wako, Saitama 35101, Japan

[5] Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy

[6] Kyoto Univ, Fac Sci, Dept Phys, Sakyo Ku, Kyoto 60601, Japan

[7] Univ Leicester, Dept Phys & Astron, Xray Astron Grp, Leicester LE1 7RH, Leics, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1998年 / 295卷 / 02期

关键词：

galaxies; active; individual; NGC; 4507; Seyfert; X-rays;

D O I：

10.1046/j.1365-8711.1998.01302.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results of the ASCA observation of the Seyfert 2 galaxy NGC 4507. The 0.5-10 keV spectrum is rather complex and consists of several components: (i) a hard X-ray power law heavily absorbed by a column density of about 3 x 10(23) cm(-2), (ii) a narrow Fe K alpha line at 6.4 keV, () soft continuum emission well above the extrapolation of the absorbed hard power law and (iv) a narrow emission line at similar to 0.9 keV. The line energy, consistent with highly ionized neon (Ne IX), may indicate that the soft X-ray emission is derived from a combination of resonant scattering and fluorescence in a photoionized gas. Some contribution to the soft X-ray spectrum from thermal emission, as a blend of Fe L lines, by a starburst component in the host galaxy cannot be ruled out with the present data.

引用

页码：443 / 450

页数：8

共 39 条

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