Chandra X-ray Observations of NGC 4258: Iron Absorption Lines from the Nucleus

نویسندگان

  • A. J. Young
  • A. S. Wilson
چکیده

Present address MIT Center for Space Research, 77 Massachusetts Avenue, Cambridge, MA 02139 Adjunct Astronomer, Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

New Chandra/ HST-STIS results on Seyfert I AGN: Photoionized Outflows

We present soft X-ray results from observations with Chandra (HETGS) of the Seyfert I AGN NGC 4593 and Mrk 509. We discuss the photoionized outflows associated with Seyfert I AGN in terms of their absorption spectral signatures and discuss their kinematics, column density and ionization state. We discuss the link between UV and X-ray absorbers in Mrk 509 (which was simultaneously observed with ...

متن کامل

X - Ray Spectroscopy and Modeling of the Absorbing and Emitting Outflow in Ngc 3783

The high-resolution X-ray spectrum of NGC 3783 shows several dozen absorption lines and a few emission lines from the H-like and He-like ions of O, Ne, Mg, Si, and S as well as from Fe XVII–Fe XXIII L-shell transitions. We have reanalyzed the Chandra HETGS spectrum using better flux and wavelength calibrations along with more robust methods. Combining several lines from each element, we clearly...

متن کامل

Astronomy and Astrophysics an X-ray View of the Active Nucleus in Ngc 4258

XMM-Newton observed the Seyfert 1.9 galaxy NGC 4258 in December 2000. At energies above 2 keV a hard nuclear point source is resolved that can be fitted by a highly absorbed power-law spectrum (N H = (8.0±0.4)×10 22 cm −2 , photon index 1.64±0.08) with an unabsorbed luminosity of 7.5×10 40 erg s −1 in the (2–10) keV band. No narrow iron Kα emission line is detected (90% upper limit of equivalen...

متن کامل

Discovery of Narrow X-ray Absorption Lines from Ngc 3783 with the Chandra Hetgs

We present the first grating-resolution X-ray spectra of the Seyfert 1 galaxy NGC 3783, obtained with the High Energy Transmission Grating Spectrometer on the Chandra X-ray Observatory. These spectra reveal many narrow absorption lines from the H-like and He-like ions of O, Ne, Mg, Si, S and Ar, as well as Fe XVII–Fe XXI L-shell lines. We have also identified several weak emission lines, mainly...

متن کامل

Chandra Grating Observations of Seyfert 1 Galaxies

We present new results from a Chandra HETG observation of NGC 5548 and give a comparison of absorption and emission features found in Seyfert 1 galaxies using Chandra grating observations. Deep soft X-ray edges are seen in Mkn 509 and NGC 3783, consistent with ASCA data. In NGC 5548 and NGC 4501 the edges are weak but consistent with the low column densities. We show that the detection of a nar...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003