Titlebook: Observational Cosmology; With the New Radio S M. N. Bremer,N. Jackson,I. Pérez-Fournon Conference proceedings 1998 Springer Science+Busines

水獺

The Sunyaev-Zel’Dovich Effect And Hubble’s Constant(..) without the need for distance-ladder-type arguments. I discuss the random and systematic errors inherent in this method of estimating .., and present the preliminary results obtained for A2218 of .. = 38.km.Mpc.. These two clusters of galaxies are part of an orientation unbiased, X-ray selected

使堅(jiān)硬

A High-Redshift Cluster Detected Via Its S-Z Effect μJy in a 110″ x 175″ beam, is similar to those produced by rich galaxy clusters via the Sunyaev-Zel’dovich effect, but optical, infra-red and X-ray observations show no evidence for such a cluster at . < 1. Optical spectra show the quasars to be extremely similar, raising the possibility that they

態(tài)度暖昧

The High Redshift 3CR Radio Galaxies: CD Galaxies in High Redshift Clustersifference between the K-. relationships of the 3CR and 6C galaxies is investigated: the 3CR galaxies must contain a greater mass of stars, consistent with them lying at the centre of clusters. The consequences of these results are discussed.

ABASH

Conference proceedings 1998ity or of small area with highsensitivity. Both limit the kinds of cosmology that can be carried outwith radio surveys. .This situation has been revolutionised in the past few years by theavailability of new, large-area, high-sensitivity radio surveys atboth low and high radio frequencies. These sig

有權(quán)威

Radio Astronomy and Cosmology cosmic epoch can now be related to the star-formation history of galaxies as a whole. The lessons to be learned from this story for the planning of future research programmes and new facilities are discussed.

Encoding

NVSS Observations of UGC Galaxiesratios consistent with star formation. Luminosity and visibility functions are derived for starforming and AGN powered radio sources. The normal galaxy luminosity function closely follows the IR luminosity function scaled by the radio-IR relation. The AGN luminosity function is steadily rising towards lower luminosity at 10. W/Hz.

創(chuàng)造性

Radio-Optical Orientation of E/S0 GalaxiesE/S0s with very weak, marginally extended radio cores. The only double-lobed (previously known) radio source is a dumbbell. For the rest of the objects, all hosting small and weak radio sources, the DSS is inadequate to determine morphological types. Thus a significant increase in sample size will be a major effort.

avarice

The Cambridge Low Frequency Radio Surveys: 6C, 7C, 8Cosecδ arcsec.—is currently being analysed and we now have catalogues in a number of selected regions, many of which have been observed repeatedly at a series of epochs for monitoring variable sources. These surveys provide a valuable resource for cosmology.

GUILE

Imaging the Cosmic Microwave Background structures at high redshift that are otherwise invisible. The challenges of CMB imaging are addressed, the two standard observing strategies — beam-switching and interferometry — are compared, and the recent, very rapid progress in CMB astronomy assessed.

防止

A High-Redshift Cluster Detected Via Its S-Z Effectbservations show no evidence for such a cluster at . < 1. Optical spectra show the quasars to be extremely similar, raising the possibility that they are lensed images of the same object; this is consistent with the high mass required to produce the decrement by either the Sunyaev-Zel’dovich or Rees-Sciama effects.