Revealing the Nature of the X-ray Absorption in NGC 4151

Details Revealing the Nature of the X-ray Absorption in NGC 4151 Revealing the Nature of the X-ray Absorption in NGC 4151

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9272k&link_type=abstract

HST Proposal ID #9272

Physics

Hst Proposal Id #9272

Scientific paper

Determining the nature of the soft X-ray absorption in the Seyfert galaxy NGC 4151 has proved elusive. Currently, the strong downturn below 3 keV is thought to be a blend of absorption edges from highly ionized species in an unusually large column of gas. However, it has been impossible to test this explanation or constrain physical models of the gas due to the inability of previous X-ray missions to resolve the expected absorption lines. We propose simultaneous Chandra and HST/STIS observations of NGC 4151 to detect the X-ray absorption lines, determine the ionization state, column, and kinematics of the X-ray absorbers, and determine the connection to the UV absorbers.

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