Near IR Spectroscopy of Distant Radio Galaxies

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Session 104 -- Radio Galaxies and AGN
Display presentation, Saturday, January 15, 9:30-6:45, Salons I/II Room (Crystal Gateway)

[104.01] Near IR Spectroscopy of Distant Radio Galaxies

P. McCarthy (OCIW), R. Elston (CTIO), P. Eisenhardt \& N. Lu (JPL)

We have obtained near-IR spectra of 10 radio galaxies with $2.0 < z < 2.64$ using the IRS and OSIRIS at CTIO and the CRSP at KPNO. In this redshift range H$\alpha$ falls in the K window and [OIII]5007 and [OII]3727 fall in the H and J windows, respectively. We have derived the Ly $\alpha$/H $\alpha$ ratios for all of our objects and find values ranging from $2$ to $>6$, implying a wide range in reddening to the narrow line region. We find no cases with convincing quasar-like broad lines, although higher S/N data are needed to make a strong limit. We discuss the impact of the implied reddening on the SEDs and the stellar models used in estimating ages and formation redshifts.

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