Results 51 to 60 of about 252,176 (198)
HST images of a galaxy group at z = 2.81, and the sizes of damped Lyα galaxies [PDF]
, 1998 We present HST WFPC2 observations in three bands (F450W, F467M and F814W) of a group of three galaxies at z=2.8 discovered in a ground-based narrow-band search for Lyman alpha emission near the z=2.8 quasar PKS0528-250.
P. Møller, S. Warren
semanticscholar +1 more source
Imaging FTS: A Different Approach to Integral Field Spectroscopy
Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014 Imaging Fourier transform spectroscopy (iFTS) is a promising, although technically very challenging, option for wide‐field hyperspectral imagery. We present in this paper an introduction to the iFTS concept and its advantages and drawbacks, as well as examples of data obtained with a prototype iFTS, SpIOMM, attached to the 1.6 m telescope of the ...
Laurent Drissen +8 more
wiley +1 more source
Keck Spectroscopy of Faint 3
, 2010 As Lyman-alpha photons are scattered by neutral hydrogen, a change with redshift in the Lyman-alpha equivalent width distribution of distant galaxies offers a promising probe of the degree of ionization in the intergalactic medium and hence when cosmic ...
Ellis, Richard S. +2 more
core +2 more sources
Chemical Evolution of Damped Lyα Galaxies: The [S/Zn] Abundance Ratio at Redshift ≥2 [PDF]
, 2000 Relative elemental abundances, and in particular the α/Fe ratio, are important diagnostic tools of the chemical evolution of damped Lyα (DLA) systems. The S/Zn ratio is not affected by differential dust depletion and is an excellent estimator of the α/Fe
M. Centurión +3 more
semanticscholar +1 more source
The Mitchell Spectrograph: Studying Nearby Galaxies with the VIRUS Prototype
Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013 The Mitchell Spectrograph (a.k.a. VIRUS‐P) on the 2.7 m Harlan J. Smith telescope at McDonald Observatory is currently the largest field of view (FOV) integral field unit (IFU) spectrograph in the world (1.7′ × 1.7′). It was designed as a prototype for the highly replicable VIRUS spectrograph which consists of a mosaic of IFUs spread over a 16 ...
Guillermo A. Blanc +1 more
wiley +1 more source
Statistical and Dynamical Decoupling of the IGM from Dark Matter
Advances in Astronomy, Volume 2011, Issue 1, 2011., 2011 Although the gravitational field in the universe is dominated by dark matter, cosmological observations show that the statistical properties of cosmic baryonic matter are significantly and systematically decoupled from that of the underlying dark matter. The dynamical reason of the decoupling is the difference of the nonlinear evolution of baryon fluid
Li-Zhi Fang +2 more
wiley +1 more source
A Systematic Survey of Protoclusters at $z\sim3\mathrm{-}6$ in the CFHTLS Deep Fields [PDF]
, 2016 We present the discovery of three protoclusters at $z\sim3\mathrm{-}4$ with spectroscopic confirmation in the Canada-France-Hawaii Telescope (CFHT) Legacy Survey Deep Fields.
Furusawa, Hisanori +10 more
core +2 more sources
Large Population of ALMA Galaxies at z>6 with Very High [OIII]88um to [CII]158um Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit? [PDF]
, 2020 We present our new ALMA observations targeting [OIII]88um, [CII]158um, [NII]122um, and dust continuum emission for three Lyman break galaxies at z=6.0293-6.2037 identified in the Subaru/Hyper Suprime-Cam survey.
Bakx, Tom +22 more
core +2 more sources
Nitrogen Abundances in Damped Lyα Galaxies [PDF]
, 1998 Nitrogen lines of the N I λ1134 and λ1200 multiplets in the damped Lyα (DLA) galaxies at zabs = 2.309, 2.827, and 3.025 toward the QSOs 0100+1300, 1425+6039, and 0347-3819, respectively, have been detected by means of high-resolution spectra (R ~ 2 × 104)
M. Centurión +3 more
semanticscholar +1 more source
Primordial Non‐Gaussianity in the Large‐Scale Structure of the Universe
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 Primordial non‐Gaussianity is a potentially powerful discriminant of the physical mechanisms that generated the cosmological fluctuations observed today. Any detection of significant non‐Gaussianity would thus have profound implications for our understanding of cosmic structure formation. The large‐scale mass distribution in the Universe is a sensitive
Vincent Desjacques +2 more
wiley +1 more source