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Title:
HST images of nearby luminous quasars
Authors:
Bahcall, John N.; Kirhakos, Sofia; Schneider, Donald P.
Affiliation:
AA(Inst. for Advanced Study, Princeton, NJ, US), AB(Inst. for Advanced Study, Princeton, NJ, US), AC(Inst. for Advanced Study, Princeton, NJ, US)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 435, no. 1, p. L11-L14 (ApJ Homepage)
Publication Date:
11/1994
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL PHOTOMETRY, GALACTIC EVOLUTION, QUASARS, RED SHIFT, STAR FORMATION, STELLAR LUMINOSITY, STELLAR MAGNITUDE, ELLIPTICAL GALAXIES, GALACTIC NUCLEI, HUBBLE SPACE TELESCOPE, SEYFERT GALAXIES, SPIRAL GALAXIES
DOI:
10.1086/187582
Bibliographic Code:
1994ApJ...435L..11B

Abstract

Strong upper limits are placed on the visual-band brightness of galactic hosts for four luminous, radioquiet quasars with redshifts between 0.16 and 0.24 that were studied with the Hubble Space Telescope (HST's) Wide Field/Planetary Camera 2 (WFPC2). Typical upper limits on the luminosities of galactic hosts are approximately 1.4 mag fainter than L* for spirals and approximately 0.5 mag fainter than L* for ellipticals. The galactic hosts of the quasars are more than a magnitude and a half fainter than the median integrated absolute magnitude of Seyfert galaxies. If the detection limits are determined using featureless simulated galaxies instead of observed galaxy images, then the detection limits for spirals are 0.5-1.0 mag less stringent. These results are consistent with the hypothesis that the quasar phenomenon corresponds to the early stages of galaxy formation, before extensive star formation occurs.

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