Science News Archive
13 June 2008 The clustering of BzK galaxies (Hartley
et al., in prep.). Galaxies in the UDS have been selected to lie in
the redshift range 1.4 < z < 2.5 and can be characterised as either
star-forming (sBzK) or passive (pBzK) by the Daddi et al. (2004)
criterea. In this redshift range it is the passive galaxies that are
found to be the more highly clustered. The clustering of a set of
galaxies can be directly linked to the mass of the dark matter halos
in which they reside; in the case of the pBzKs the dark matter halos
have mass in excess of 1013 solar masses.
24 January 2008 A recently discovered high-redshift
quasar in the LAS, ULAS J131911.29+095051.4 (Mortlock et al., in
prep). The redshift has been estimated from the wavelength at which
absorption to the blue of the emission line cuts on, and assuming this
point to be the centre of the Lya emission line. The source has i(AB)=22.6,
Y=19.2, J=18.8.
1 June 2007 Spitzer view of the cool brown dwarf
ULAS J0034-00. In this rgb image, the blue channel is the z band,
and the green and red channels are Spitzer channels 1 and 2 (3.55
and 4.49 um). Therefore main-sequence stars, relatively faint in
the mid-ir, appear blue.
