The Host Galaxy of the Broad Absorption Line QSO PG 1700+518 and Its Ring Galaxy Companion: NICMOS 1.6 Micron Imaging

Creators: Hines, Dean C.; Low, Frank J.; Thompson, Rodger I.; Weymann, Ray J.; Storrie-Lombardi, Lisa J.

Abstract

The 1.6 μm Near Infrared Camera and Multiobject Spectrometer image of the broad absorption line QSO PG 1700+518 clearly resolves the QSO host galaxy and a ringlike companion. The companion is most likely a ring galaxy produced in a collision with the QSO galaxy ~5×10^7 yr ago. The morphology of the PG 1700+518 system is very similar to IRAS 04505-2958 (Boyce et al. 1996). Both objects were identified in a sample of eight QSOs selected by "warm" far-IR colors and extreme IR luminosities (Low et al. 1988). All eight QSOs show signs of strong interaction, and the presence of two head-on colliding systems in this sample may suggest that small impact parameters favor the energizing of IR-luminous QSOs.

Additional Information

© 1999 The American Astronomical Society. Received 1998 July 8; accepted 1998 September 16. Based on observations with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. We thank G. Schneider and D. Lytle for suggestions regarding PSF subtraction. We are grateful to M. Rieke and E. Stobie for assistance with the darks and flat fields. It is a pleasure to thank A. Stockton, G. Canalizo, and L. Close for providing details of their adaptive optics observations prior to publication. Thanks to G. Rieke and A. Quillen for valuable discussions. Finally, we thank Z. Levay at STScI for his assistance with understanding color lookup tables in Adobe Photoshop. This work is supported by NASA grant NAG 5-3042 to the NICMOS instrument definition team.

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