Astronomical School’s Report, 2012, Volume 8, Issue 2, Pages 160–165

https://doi.org/10.18372/2411-6602.08.2160
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UDC 524.7

X-Ray spectra of AGN's with strong emission lines

Tugay A.V., Vasylenko A.A., Zaetc T.A.

Kyiv Shevchenko National University, Ukraine

Abstract

Using XMM-Newton archive we obtained X-ray spectra for 12 AGN's with strong optical emission lines. Models of our spectra corresponds to Seyfert galaxies. We conclude that for Seyfert galaxies power-law spectral index in 2–12 keV band is less than 1.9 and minimal X-ray flux exceeds 1% of optical flux in u-band.

Keywords: active galactic nuclei; X-ray spectra

References

  1. Vasylenko A.A. (2012). Vyznachennia parametriv aktyvnoho yadra v halaktytsi NGC1194. Visnyk Kyyivs’koho Universytetu. Astronomiya..
  2. Tuhay A.B., Vasylenko A.A. (2011). X-ray emission of galaxies with emission lines. Astronomical School’s Report, 7(1–2), 114–116. https://doi.org/10.18372/2411-6602.07.1114
  3. Tugay A.V., Vasilenko A.A. (2011). Rentgenovskoe izluchenie galaktik bez aktivnykh yader. Trudy 11-y Gamovskoy astronomicheskoy konferentsii-shkoly. Odessa., 24, 72–74.
  4. Anderson S.F., et al. (2003). A large, uniform sample of X-ray-emitting AGNs: selection approach and an initial catalog from the ROSAT all-sky and Sloan digital sky surveys. The Astronomical Journal, 126, 2209–2229. https://doi.org/10.1086/378999
  5. Baldwin J.A., Phillips M.M., Terlevich R. (1981). Classification parameters for the emission-line spectra of extragalactic objects. PASP, 93, 5–19. https://doi.org/10.1086/130766
  6. Dickey J.M., Lockman F.J. (1990). HI in the Galaxy. ARA&A, 28, 215–261.
  7. González-Martín O., et al. (2009). An X-ray view of 82 LINERs with Chandra and XMM-Newton data. A&A, 506, 1107–1121. https://doi.org/10.1051/0004-6361/200912288
  8. Kauffmann G., et al. (2003). The host galaxies of active galactic nuclei. MN RAS, 349, 1055–1077.
  9. Noguchi, et al. (2010). Scattered X-rays in obscured active galactic guclei and their implications for geometrical structure and evolution. The Astrophysical Journal, 711, 144–156. https://doi.org/10.1088/0004-637x/711/1/144
  10. Pineau F.-X., et al. (2011). Cross-correlation of the 2XMMi catalogue with Data Release 7 of the Sloan Digital Sky Survey. A&A, 527, 126–147. https://doi.org/10.1051/0004-6361/201015141
  11. Thuan T.X., Pilyugin L.S., Zinchenko I.A. (2010). The redshift evolution of oxygen and nitrogen abundances in emission-line SDSS galaxies. The Astrophysical Journal, 712, 1029–1048. https://doi.org/10.1088/0004-637x/712/2/1029
  12. Tugay A.V., Vasylenko A.A. (2009). XMM-Newton observations of X-ray pulsar Cen X-3. YSC'16 Proceedings of Contributed Papers (eds. Choliy V. Ya., Ivashchenko G.), 58–61.
  13. Winter L.M., et al. (2010). Optical spectral properties of Swift Burst Alert Telescope hard X-Ray-selected active galactic nuclei sources. The Astrophysical Journal, 710, 503–539. https://doi.org/10.1088/0004-637x/710/1/503
  14. Winter L.M., et al. (2008). X-ray properties of an unbiased hard X-ray-detected sample of active galactic nuclei. The Astrophysical Journal, 674, 686–710. https://doi.org/10.1086/525274
  15. Yuan W., et al. (2004). Discovery of high-amplitude X-ray variability in the Seyfert-LINER transition galaxy NGC7589. Mon. Not. R. Astron. Soc., 353, L29-L33. https://doi.org/10.1111/j.1365-2966.2004.08266.x

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