Astronomical and Space SciencesThe conventional picture of supermassive black-hole growth in the standard model had already been seriously challenged by the emergence of [Math Processing Error] 10 9 M ⊙ \\sim 10^9\\;M_\\odot quasars at [Math Processing Error] z 7.5 z\\sim 7.5 , ...
The cosmic curvature parameter ΩK is related to K and the Hubble constant H0, as ΩK =−c2K/a02H02. The comoving distance DC is related to the evolution of the scale factor DC=c∫0zdz′H(z′), (2) where the redshift z replaces the scale factor via relation a=1/(1+z), ...
The DEEP2 Galaxy Redshift Survey: the role of galaxy environment in the cosmic star formation history Using galaxy samples drawn from the Sloan Digital Sky Survey and the DEEP2 Galaxy Redshift Survey, we study the relationship between star formation and env... MC Cooper,JA Newman,BJ Weiner,...
The Spitzer Space Telescope has been a crucial tool for addressing these questions. Accurate knowledge of stellar masses, ages and star formation rates requires measuring rest-frame optical (and ultraviolet) light, which only Spitzer can probe at high redshifts for a sufficiently large sample of ...
The Hubble expansion and the cosmic redshift Guido Chincarini Here we derive a few preliminary expression for the redshift. Try to see the difference between Doppler redshift and Cosmological redshift. The difference between the signal received from a distant object in an expanding Universe and an...
We present optical and near-infrared observations of the afterglow of the gamma-ray burst GRB050904. We derive a photometric redshift z = 6.3, estimated from the presence of the Lyman break falling between the I and J filters. This is by far the most distant GRB known to date. Its isot...
Light rays received on earth from distant stars show redshift, being attributed conventionally to the well-known Doppler-effect of wave dynamics. The present study concludes that cosmic redshift rather is an effect of the quantum mechanical propagation of photons as explained by Nobel Laureate ...
The reversal of the star formation–density relation in the distant Universe. Astron. Astrophys. 468, 33–48 (2007). Article ADS Google Scholar Cooper, M. C. et al. The DEEP2 galaxy redshift survey: the role of galaxy environment in the cosmic star formation history. Mon. Not. R. ...
The Hubble expansion and the cosmic redshift - INAF - OA-Brera：哈勃膨胀的宇宙红移- INAF - OA布雷拉 TheHubbleexpansionandthecosmicredshift GuidoChincariniHerewederiveafewpreliminaryexpressionforthe redshift.TrytoseethedifferencebetweenDopplerredshiftand Cosmologicalredshift.Thedifferencebetweenthesignal...
If the time intervals are small (δte, δto te, to) the above expres- sion leads to the well-known redshift relation between the emitted and the observed radiation δte a(te) = δto a(to) ⇒ λo λe = a(to) a(te) = 1 + ze(to), (2) where ze(t) is the redshift ...