Results 231 to 240 of about 210,144 (261)
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Bulge Growth Through Disc Instabilities in High-Redshift Galaxies
, 2015The role of disc instabilities, such as bars and spiral arms, and the associated resonances, in growing bulges in the inner regions of disc galaxies have long been studied in the low-redshift nearby Universe. There it has long been probed observationally,
F. Bournaud
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High Redshift Lyman Break Galaxies
2006Two of the most outstanding issues in modern astrophysics are what reionized the Universe and how did the first objects form. Observations of galaxies selected through the Lyman-Break technique indicate that UV photon output at the end of reionization was dominated by relatively faint low mass galaxies and not AGN.
Lehnert, M., Bremer, M.
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1992
A consistent picture of large-scale structure appears to be emerging from different types of observations including the spatial distribution of galaxies, clusters of galaxies, narrow pencil-beam surveys, and quasars. I describe these observations below. A network of large-scale superclusters, up to ~ 150 Mpc in scale, is suggested.
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A consistent picture of large-scale structure appears to be emerging from different types of observations including the spatial distribution of galaxies, clusters of galaxies, narrow pencil-beam surveys, and quasars. I describe these observations below. A network of large-scale superclusters, up to ~ 150 Mpc in scale, is suggested.
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The High Redshift 3CR Radio Galaxies: CD Galaxies in High Redshift Clusters
1998The old stellar populations of the 3CR radio galaxies at redshifts z ∼ 1 have been investigated using the HST and UKIRT. The radial intensity profiles of the galaxies are well matched out to radii τ ∼ 35kpc by de Vaucouleurs’ law with no requirement for an additional point source in all but two cases (3C22 and 3C41).
P. N. Best +2 more
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Annual Review of Astronomy and Astrophysics, 1993
High redshift galaxies that host powerful radio sources are examined. An overview is presented of the content of radio surveys: 3CR and 3CRR, 4C and 4C/USS, B2/1 Jy, MG, MRC/1Jy, Parkes/PSR, B3, and ESO Key-Project. Narrow-line radio galaxies in the visible and UV, the source of ionization and excitation of the emission lines, emission-line ...
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High redshift galaxies that host powerful radio sources are examined. An overview is presented of the content of radio surveys: 3CR and 3CRR, 4C and 4C/USS, B2/1 Jy, MG, MRC/1Jy, Parkes/PSR, B3, and ESO Key-Project. Narrow-line radio galaxies in the visible and UV, the source of ionization and excitation of the emission lines, emission-line ...
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1997
Study of molecular gas in distant galaxies during the last twenty years has followed the steady progress in mm wave receiver sensitivity. In 1975, CO was detected in M 82, NGC 253, and several other galaxies with redshifts of a few hundred kms−1 (Rickard et al. 1975; Solomon & de Zafra 1975).
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Study of molecular gas in distant galaxies during the last twenty years has followed the steady progress in mm wave receiver sensitivity. In 1975, CO was detected in M 82, NGC 253, and several other galaxies with redshifts of a few hundred kms−1 (Rickard et al. 1975; Solomon & de Zafra 1975).
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Cosmology with Galaxies at High Redshifts
1991Following some remarks on the methodology of the classical cosmological tests, recent observations of galaxies at high redshift are examined to see whether they place any constraints on the cosmological models. It is concluded that, at least at present, they do not.
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Measuring dynamical masses from gas kinematics in simulated high-redshift galaxies
Monthly Notices of the Royal Astronomical Society, 2020Sarah Wellons +2 more
exaly