منابع مشابه
The K band Hubble diagram for brightest cluster galaxies in X-ray clusters
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Determing the nature of the bright sub-mm sources and their role in the process of galaxy formation is likely to be a major focus of extra-galactic research over the next few years. In particular, we would like to know if these sources are the progenitors of today’s massive elliptical galaxies, or alternatively arise from short-lived, albeit spectacular starbursts within haloes of unexceptional...
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The cosmological model is at present not tested between the redshift of the farthest observed supernovae (z ∼ 1.4) and that of the Cosmic Microwave Background (z ∼1,100). Here we introduce a new method to measure the cosmological parameters: we show that quasars can be used as “standard candles” by employing the non-linear relation between their intrinsic UV and X-ray emission as an absolute di...
متن کاملJa n 19 98 The K - band Hubble diagram for the brightest cluster galaxies : a test for galaxy formation and evolution models
The K-band Hubble diagram for a sample of brightest cluster galaxies (BCGs) in the redshift range 0 < z < 1 shows a very small scatter (0.3 magnitudes r.m.s). The BCGs exhibit very little luminos-ity evolution in this redshift range: if q 0 = 0.0 we detect no luminosity evolution; for q 0 = 0.5 we measure a small negative evolution. If the mass in stars of these galaxies had remained constant o...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1996
ISSN: 0074-1809
DOI: 10.1017/s0074180900081936