A Definitive Observation of an Accretion Disk Wind in the Quasar MR 2251-178

Details A Definitive Observation of an Accretion Disk Wind in the Quasar MR 2251-178 A Definitive Observation of an Accretion Disk Wind in the Quasar MR 2251-178

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12364r&link_type=abstract

HST Proposal ID #12364. Cycle 18

Computer Science

Scientific paper

The bright, nearby QSO MR 2251-178 was the first AGN where a warm absorber was detected. Subsequent observations have shown there are at least two outflowing components; a low ionization soft X-ray absorber and a fast {0.07c}, high ionization wind. We propose a deep {400 ks} Chandra HETG observation of MR 2251-178 in order to unequivocally determine the origin of the outflow at the highest possible spectral resolution. Our goals are; {i} establish the nature of the high ionization outflow, e.g. as part of a disk wind, through unprecedented high S/N observations in the Fe/Si K band, {ii} determine the properties of the soft X-ray absorber through high resolution spectroscopy and {iii} establish the connection between the UV and X-ray absorbers with a simultaneous HST snapshot.;

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