A Hard Look at Local, Optically Selected, Obscured Seyfert Galaxies
The Astrophysical Journal
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We study the X-ray spectra of a sample of 19 obscured, optically selected Seyfert galaxies (Sy 1.8, 1.9, and 2) in the local universe (d ≤ 175 Mpc), drawn from the CfA Seyfert sample. Our analysis is driven by the high sensitivity of NuSTAR in the hard X-rays, coupled with soft X-ray spectra using XMM-Newton, Chandra, Suzaku, and Swift/XRT. We also analyze the optical spectra of these sources in order to obtain accurate mass estimates and Eddington fractions. We employ four different models to analyze the X-ray spectra of these sources, which all provide consistent results. We find that 79%–90% of the sources are heavily obscured with line-of-sight column density N H... (See full abstract in article).
Active galactic nuclei; X-ray active galactic nuclei; Active galaxies; High energy astrophysics; X-ray astronomy; Seyfert galaxies; X-ray surveys
Stars, Interstellar Medium and the Galaxy
Kammoun, E. S.,
Miller, J. M.,
Mushotzky, R. F.,
Brandt, W. N.,
Brenneman, L. W.,
Kaastra, J. S.,
Lohfink, A. M.,
A Hard Look at Local, Optically Selected, Obscured Seyfert Galaxies.
The Astrophysical Journal, 901(2),