PI: Kimiaki Kawara, Institute of Astronomy,University of Tokyo, email@example.com
Address: Institute of Astronomy,University of Tokyo,Osawa2-21-1,Mitaka, Tokyo 181-, 0015 Japan
CoI: Yuzuru Yoshii, Institute of Astronomy,University of Tokyo
CoI: Yumihiko Tsuzuki, Institute of Astronomy,University of Tokyo
CoI: Shinki Oyabu, Institute of Astronomy,University of Tokyo
Title: Obtaining FeII/MgII flux ratios in Low-Redshift QSOs
Abstract: \quad A delay of ~ 1.5 Gyr in Fe enrichment, relative to Mg ((alpha) element), might provide a chronometer for measuring the age of quasars and then constraining the age of the Universe. We are carrying out a project to do spectroscopy of many quasars from low-redshift to high-redshift in order to obtain the relation of the FeII/MgII flux ratio versus redshift. Combining this relation with the models of chemical evolution of galaxies, we would be able to know:(1)whether or not Fe is overabundant in broad-line gas of low-redshift quasars, (2)how quasar host galaxies formed, (3)the epoch of host galaxy formation, (4)the age of quasars, and eventually (5)the age of the Universe. As part of this project, we propose to do optical spectroscopy of 20 low- redshift quasars by using the GoldCam Spectrometer on KPNO-2.1m telescope. These optical spectra will be combined FOS UV spectra to extract broad FeII emission feature in the UV.
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