The Rest-Frame Optical Spectra of QSOs at 4.4 < z < 6.5

Details The Rest-Frame Optical Spectra of QSOs at 4.4 < z < 6.5 The Rest-Frame Optical Spectra of QSOs at 4.4 < z < 6.5

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.7505i&link_type=abstract

American Astronomical Society, AAS Meeting #211, #75.05; Bulletin of the American Astronomical Society, Vol. 39, p.865

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the rest-frame optical spectra of high redshift QSOs taken with AKARI, a Japanese IR space telescope with Korea and ESA participation. High redshift QSOs hold an important key to the understanding of the growth of supermassive black-holes and their role in the galaxy formation. However, the lack of rest-frame optical spectra for such objects - popular key diagnostics of QSO properties such as masses of supermassive black-holes - has limited our understanding of high redshift QSOs. Using the AKARI's unique spectroscopic capability at 2 - 5 micron, we observed 14 QSOs at 4.4 < z < 6.5, revealing for the first time, the optical emission lines such as Balmer lines of QSOs at z > 4.5. In this talk, we show the basic properties of high redshift QSOs derived from the rest-frame optical spectra, and discuss how such properties compare with QSOs at lower redshifts.

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