Interstellar MG II and C IV absorption by 1 1/2 galaxies along the sightline to MrK 205

Details Interstellar MG II and C IV absorption by 1 1/2 galaxies along the sightline to MrK 205 Interstellar MG II and C IV absorption by 1 1/2 galaxies along the sightline to MrK 205

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf..133b&link_type=abstract

In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 133-134 (SEE N93-26706 10-90)

Astronomy and Astrophysics

Astronomy

1

Absorption Spectra, Interstellar Gas, Milky Way Galaxy, Sky Surveys (Astronomy), Galactic Halos, High Resolution, Line Spectra, Spectrographs, Supernovae, Velocity Distribution

Scientific paper

The first results of our HST survey designed to search for Mg 2 and C 4 absorption lines from the disks and halos of low-redshift galaxies using background QSO's and supernovae as probes are presented. Our survey utilizes the high resolution of the Goddard High Resolution Spectrograph enabling us to calculate the column densities and doppler parameters of individual components within an absorption complex, and hence determine the physical conditions of the absorbing gas. Observing the complexity of the absorption line profiles i.e., the velocity distribution and total velocity extent of the constituent components, offers an important description of the kinematics of the absorbing gas, and hence an understanding of its origin. Focus is on one sight line in particular, that towards Mrk 205, which passes 3-5 kpc from the intervening galaxy NGC 4319. Mg 2 and C 4 absorption from both local Milky Way halo gas and from NGC 4319 is detected.

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