Results 91 to 100 of about 102,173 (261)
Evidence for Galaxy Formation at High Redshift [PDF]
Symposium - International Astronomical Union, 2001 Metcalfe et al. (1995, 1996) have shown that galaxy counts from the UV to the near-IR are well-fitted by simple evolutionary models where the space density of galaxies remains constant with look-back time while the star-formation rate rises exponentially.
Nigel Metcalfe +5 more
openaire +3 more sources
CONSTRAINTS ON PHOTOIONIZATION FEEDBACK FROM NUMBER COUNTS OF ULTRA-FAINT HIGH-REDSHIFT GALAXIES IN THE FRONTIER FIELDS [PDF]
, 2014 We exploit a sample of ultra-faint high-redshift galaxies (demagnified Hubble Space Telescope, HST, H160 magnitude > 30) in the Frontier Fields clusters A2744 and M0416 to constrain a theoretical model for the UV luminosity function in the presence of ...
B. Yue +3 more
semanticscholar +1 more source
THERMAL AND RADIATIVE ACTIVE GALACTIC NUCLEUS FEEDBACK HAVE A LIMITED IMPACT ON STAR FORMATION IN HIGH-REDSHIFT GALAXIES [PDF]
, 2014 The effects of active galactic nuclei (AGNs) on their host galaxies depend on the coupling between the injected energy and the interstellar medium (ISM). Here, we model and quantify the impact of long-range AGN ionizing radiation—in addition to the often
O. Roos +3 more
semanticscholar +1 more source
High-redshift radio galaxies: at the crossroads [PDF]
New Astronomy Reviews, 2003 12 pages, 3 figures, Invited Review to appear in "Radio galaxies: past, present & future". eds. M.
openaire +4 more sources
ACCOUNTING FOR COSMIC VARIANCE IN STUDIES OF GRAVITATIONALLY LENSED HIGH-REDSHIFT GALAXIES IN THE HUBBLE FRONTIER FIELD CLUSTERS [PDF]
, 2014 Strong gravitational lensing provides a powerful means for studying faint galaxies in the distant universe. By magnifying the apparent brightness of background sources, massive clusters enable the detection of galaxies fainter than the usual sensitivity ...
B. Robertson +5 more
semanticscholar +1 more source
Late-time growth weakly affects the significance of high-redshift massive galaxies
The Open Journal of AstrophysicsRecent observations by the James Webb Space Telescope have revealed massive galaxies at very high redshift ($z\simeq 7-15$). The question of whether the existence of such galaxies is expected in the corresponding JWST surveys has received a lot of ...
Qianran Xia +2 more
doaj +1 more source
The Astrophysical Journal, 2023 We present rest-frame optical emission-line flux ratio measurements for five z > 5 galaxies observed by the James Webb Space Telescope Near-Infared Spectrograph (NIRSpec) in the SMACS 0723 Early Release Observations.
Jonathan R. Trump +65 more
doaj +1 more source
Searches for High Redshift Radio Galaxies [PDF]
, 1998 6 pages Latex, including 3 figures, To appear in the "Observational Cosmology with the New Radio Surveys" Conference - Tenerife 13 - 15 January ...
De Breuck, C. +3 more
openaire +3 more sources
IS THERE A MAXIMUM STAR FORMATION RATE IN HIGH-REDSHIFT GALAXIES?,,, [PDF]
, 2014 We use the James Clerk Maxwell Telescope's SCUBA-2 camera to image a 400 arcmin2 area surrounding the GOODS-N field. The 850 μm rms noise ranges from a value of 0.49 mJy in the central region to 3.5 mJy at the outside edge.
A. Barger +11 more
semanticscholar +1 more source
The Astrophysical JournalJWST is uncovering the properties of ever-increasing numbers of galaxies at z > 6, during the epoch of reionization. Connecting these observed populations to the process of reionization requires understanding how efficiently they produce Lyman continuum (
Anne E. Jaskot +21 more
doaj +1 more source