Neutron Star Model Atmospheres

1
Neutron Star Model Atmospheres

• V. Suleimanov, T. Rauch, K. Werner
• University of Tübingen, Germany
• A.Y. Potekhin
• Ioffe Institute, St. Petersburg, Russia
• J. Poutanen
• University of Oulu, Finland

• Principal aim Determination of NS mass and
  radius ? EOS in core
• Several variants to constrain M, R
• Identification of gravitationally redshifted
  spectral lines in X-ray bursting NSs computation
  of hot (Teff millions of K) high-gravity (log
  g15) NLTE models
• Modeling the X-ray spectra of spreading layers
  on the surface of accreting NSs in LMXBs
• ? results of both methods give large NS radii,
  hence, stiff EOS
• Modeling of broad absorption features observed
  in X-ray spectra of isolated NSs new code for
  magnetized NS atmospheres to compute cyclotron
  absorption lines and absorption by vacuum
  resonance opacity.