Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-19
Astrophys.J. 603 (2004) L65-L68
Astronomy and Astrophysics
Astrophysics
Submitted to Astrophys. J. Letters
Scientific paper
10.1086/383222
We present an investigation of the environment (\approx 600 kpc radius) of a pair of luminous z=4.25 quasars, SDSS J1439-0034 A,B, separated by 33''. An analysis of high-quality Subaru spectra of the quasars suggests that this configuration is indeed a physical pair and not a gravitational lens; the redshifts are slightly different (although marginally consistent with being the same), and the two spectra have strikingly different features. We search for bright galaxies (L\gsim 0.4 L^*) having similar redshifts using the V dropout technique and semi-narrow band imaging looking for strong Ly alpha emission. We find no enhancement in the galaxy density around the quasar pair; its environment differs very little from a general field, with the upper limit of the density enhancement being about 3 at a 90% confidence. We infer that bright quasars happened to appear in two normal galaxies in a general field.
Doi Mamoru
Fukugita Masataka
Kashikawa Nobunari
Nakamura Osamu
Schneider Donald P.
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