The Nature of the Close Binary Quasar LBQS 0103-2753

Details The Nature of the Close Binary Quasar LBQS 0103-2753 The Nature of the Close Binary Quasar LBQS 0103-2753

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9498j&link_type=abstract

HST Proposal ID #9498

Physics

Hst Proposal Id #9498

Scientific paper

We propose STIS spectroscopic and ACS imaging observations of the small-separation quasar pair LBQS 0103-2753 A/B {= CT 344}. This quasar pair with z = 0.85, has a projected separation of only 0.3 arcsec or 2.3 kpc. The brighter member of the pair {V = 18.2} is a BAL quasar while the fainter {V = 19.4} is a quasar at a similar redshift without BALs. It is very likely that the two quasars are a binary quasar, and not a chance superposition along the line of sight or a gravitational lens {Junkkarinen et al. 2001}. The goals of the STIS spectroscopic observations are to accurately measure the systemic redshifts and redshift difference, to search for variability, and to quantify the emission line differences between the two quasars. Deep ACS WFC images, in the F606W and F814W filters, will be used to provide information on the host galaxy morphologies, to look for the signatures of a merger/interaction - in particular disturbed isophotes and tidal tails, and to study any cluster of galaxies around this quasar pair. These observations will test the lensing versus binary hypothesis and help differentiate between merging and a high relative velocity galaxy-galaxy interaction. Studies of binary quasars with such close separations will put constraints on merger timescales and duty cycles for AGN fueling at these separations.

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