A Correlation Between Galaxy Morphology and MgII Halo Absorption Strength
| Autor: | Christopher W. Churchill, Glenn G. Kacprzak, Michael T. Murphy, Jessica L. Evans, Charles C. Steidel |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Physics
education.field_of_study Population Astrophysics (astro-ph) Sigma FOS: Physical sciences Astronomy and Astrophysics Quasar Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Redshift Accretion (astrophysics) Galaxy Space and Planetary Science Satellite galaxy Halo education Astrophysics::Galaxy Astrophysics |
| Popis: | (Abridged) We compared the quantified morphological properties of 37 intermediate redshift MgII absorption selected galaxies to the properties of the absorbing halo gas, observed in the spectra of background quasars. The galaxy morphologies were measured using GIM2D modeling of Hubble Space Telescope WFPC-2 images and the absorbing gas properties were obtained from HIRES/Keck and UVES/VLT quasar spectra. We found a 3.1 sigma correlation between galaxy morphological asymmetries normalized by the quasar-galaxy projected separations, A/D, and the MgII rest-frame equivalent widths. Saturation effects cause increased scatter in the relationship with increasing W_r(2796). We defined a subsample for which the fraction of saturated pixels in the absorption profiles is f_sat Accepted for publication in the Astrophysical Journal |
| Databáze: | OpenAIRE |
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