Other
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19511605e&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #116.05; Bulletin of the American Astronomical Society, Vol. 31, p.1545
Other
Scientific paper
Using NICMOS on HST, we have imaged the emission-line nebulae and line-free continuum in 4C 40.36, a ultra-steep spectrum FR II radio galaxy at z=2.269. The emission-line nebulae seen in Hα +[N II] and [O III] show very clumpy structures spreading almost linearly over 16 kpc (q0=0.5; H0=50 km s-1 Mpc-1). However, this linear structure is clearly misaligned from the radio axis, which may indicate that it is not the expanding jet that is ionizing the gas. The near-IR (i.e., restframe optical) line-free continuum, on the other hand, is extremely compact and symmetric. It has an unresolved core (PSF FWHM = 0\farcs2 = 1.6 kpc) and an almost circularly symmetric halo extending out to at least a radius of 4 kpc. A comparison with the optical (i.e., restframe UV) data shows that the intrinsic SED of the continuum is extremely flat (fν ν -0.5) from the restframe UV to optical, suggesting that the continuum source is either a young bursting stellar population or scattered AGN light.
Armus Lee
Egami Eiichi E.
Evans Aaron S.
Murphy W. _Jr. T.
Neugebauer Gernot
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