Journal Article

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

A. Comastri, C. Vignali, M. Cappi, G. Matt, R. Audano, H. Awaki and S. Ueno

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 295, issue 2, pages 443-450
Published in print April 1998 | ISSN: 0035-8711
Published online April 1998 | e-ISSN: 1365-2966 | DOI:
On the nature of the X-ray absorption in the Seyfert 2 galaxy NGC 4507

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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 3–1023 cm−2, (ii) a narrow Fe Kα line at 6.4 keV, (iii) soft continuum emission well above the extrapolation of the absorbed hard power law and (iv) a narrow emission line at ∼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.

Keywords: galaxies: active; galaxies: individual: NGC 4507; galaxies: Seyfert; X-rays: galaxies.

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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