Using MRK 205 TO Probe the Ionized ISM in NGC 4319

Details Using MRK 205 TO Probe the Ionized ISM in NGC 4319 Using MRK 205 TO Probe the Ionized ISM in NGC 4319

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4434b&link_type=abstract

HST Proposal ID #4434

Computer Science

Hst Proposal Id #4434

Scientific paper

We propose using the 160M grating of the GHRS to search for Lya absorption in the spectrum of the QSO Mrk 205, at the redshift of the intervening galaxy NGC 4319. The line-of-sight to the quasar lies only 3-5 kpc from the center of the galaxy, passing through an inter-arm region of the disk and halo. The QSO was observed in Cycle 1 as part of our programme to search for metal absorption lines in intervening galaxies, when we detected Mg II and C IV absorption from NGC 4319. The gas appears to be highly ionized, at least compared to Milky Way halo gas, and we now request further GHRS observations of Lya to explore the conditions within the gas. The sightline offers a unique opportunity to probe the interstellar medium of both a low-redshift galaxy and our own Galactic halo, and to provide important comparisons with QSO absorption systems seen at higher redshifts.

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