Results 71 to 80 of about 245,319 (342)
Redshift Accuracy Requirements for Future Supernova and Number Count Surveys [PDF]
Astrophys.J.615:595,2004; Astrophys.J.615:595-602,2004, 2004 We investigate the required redshift accuracy of type Ia supernova and cluster number-count surveys in order for the redshift uncertainties not to contribute appreciably to the dark energy parameter error budget. For the SNAP supernova experiment, we find that, without the assistance of ground-based measurements, individual supernova redshifts would ...
arxiv +1 more source
An improved redshift indicator for Gamma-Ray Bursts, based on the prompt emission
, 2006 We propose an improved version of the redshift indicator developed by Atteia (2003), which gets rid of the dependence on the burst duration and provides better estimates for high-redshift GRBs.
Atteia, Jean-Luc +4 more
core +2 more sources
Baryon Acoustic Oscillations in 2D: Modeling Redshift-space Power Spectrum from Perturbation Theory [PDF]
, 2010 We present an improved prescription for matter power spectrum in redshift space taking a proper account of both the non-linear gravitational clustering and redshift distortion, which are of particular importance for accurately modeling baryon acoustic ...
A. J. S. Hamilton +14 more
core +3 more sources
ASTROMETRIC REDSHIFTS FOR QUASARS [PDF]
The Astronomical Journal, 2009 The wavelength dependence of atmospheric refraction causes differential chromatic refraction (DCR), whereby objects imaged at different optical/UV wavelengths are observed at slightly different positions in the plane of the detector. Strong spectral features induce changes in the effective wavelengths of broad-band filters that are capable of producing
Gordon T. Richards +3 more
openaire +3 more sources
Advanced Functional Materials, EarlyView.In this study, a novel facet‐junction strategy is proposed to enhance the strong metal‐support interaction (SMSI) between the loaded Ru atoms and the Co3O4 support. The synthesized structure with the incorporation of Ru doping and the (100)/(111) crystal plane junction has a particular influence on the catalyst's hydrogen evolution reaction (HER ...
Wenqian Shen +6 more
wiley +1 more source
Fast Radio Burst Energy Function in the Presence of DMhost Variation
UniverseFast radio bursts (FRBs) have been found in great numbers, but the physical mechanism of these sources is still a mystery. The redshift evolutions of the FRB energy distribution function and the volumetric rate shed light on the origin of FRBs.
Ji-Guo Zhang +5 more
doaj +1 more source
The Redshift Distribution of Infrared-Faint Radio Sources [PDF]
, 2018 Infrared-Faint Radio Sources (IFRSs) are an important class of high-redshift active galaxy, and potentially important as a means of discovering more high-redshift radio sources, but only 25 IFRSs had redshifts prior to this paper. Here we increase the number of IFRSs with known spectroscopic redshifts by a factor of about 5 to 131, with redshifts up to
arxiv +1 more source
Using Galaxy Two-point Correlation Functions to Determine the Redshift Distributions of Galaxies Binned by Photometric Redshift [PDF]
Astrophys.J.651:14-23,2006, 2006 We investigate how well the redshift distributions of galaxies sorted into photometric redshift bins can be determined from the galaxy angular two-point correlation functions. We find that the uncertainty in the reconstructed redshift distributions depends critically on the number of parameters used in each redshift bin and the range of angular scales ...
arxiv +1 more source
The Angular Diameter-Redshift Test for Large Redshift Quasars [PDF]
Symposium - International Astronomical Union, 1977 Complete samples of quasars in the 3CR and 4C catalogues have been observed with a resolution of 2″ arc in RA and 2″ cosecδ in dec with the Cambridge 5-km telescope at 5 GHz (Riley & Pooley 1975; Jenkins et al 1977), from which it has been possible to determine the overall angular sizes of their radio structures (LAS). The angular diameter-redshift
J. M. Riley, A. Hooley, M. S. Longair
openaire +2 more sources
Advanced Functional Materials, EarlyView.An ultrathin polarizonic metasurface achieves multiband camouflage and stealth with near‐perfect ultraviolet (UV) absorption, visible light blending, and infrared signature masking. Leveraging earth‐abundant materials, this design creates a reflective color palette through polarizonic effects, integrating transparent and non‐plasmonic materials.
Mhd Adel Assad, Mady Elbahri
wiley +1 more source