Dust at high Z

Details Dust at high Z Dust at high Z

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...288l..33c&link_type=abstract

Astronomy and Astrophysics 288L, L33-L36 (1994)

Astronomy and Astrophysics

Astrophysics

63

Galaxies: Interstellar Matter, Evolution

Scientific paper

We have searched for dust emission at 1300μm in three distant radio galaxies and detected faint signals from 4C41.17 (z=3.8) and 0902+34 (z=3.46); for 1232+39 (z=3.22) we could obtain a useful upper limit. Comparison with radio and submm data suggests that the 1300μm flux from the most distant known galaxy 4C41.17 is due to thermal emission from dust. We derive a dust temperature of ~80K. Adopting galactic grain properties, this transforms into a total dust mass M_dust_~9x10^7^M_Sun_ for 4C41.17 and comparable values for the two other distant objects. The ionized gas of the Lyα halo and the dust must be spatially separated; we suggest a disk-like configuration for the dust, perpendicular to the alignment axis of radio and optical emission. The IR luminosity of 4C41.17 is estimated to be ~10^14^L_Sun_.

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