Results 51 to 60 of about 10,764,000 (383)
Theoretical Systematics in Testing the Cosmological Principle with the Kinematic Quasar Dipole
The Astrophysical Journal, 2023 The Cosmological Principle (CP) is part of the foundation that underpins the standard model of the Universe. In the era of precision cosmology, when stress tests of the standard model are uncovering various tensions and possible anomalies, it is critical
Caroline Guandalin +3 more
doaj +1 more source
The global 21-cm signal in the context of the high- z galaxy luminosity function [PDF]
, 2016 We build a new model for the global 21-cm signal that is calibrated to measurements of the high-z galaxy luminosity function (LF) and further tuned to match the Thomson scattering optical depth of the cosmic microwave background, τe. Assuming that the z ≲
J. Mirocha, S. Furlanetto, Guochao Sun
semanticscholar +1 more source
Introducing the FirstLight project: UV luminosity function and scaling relations of primeval galaxies [PDF]
, 2017 We introduce the FirstLight project that aims to generate a large database of high-resolution, zoom-in simulations of galaxy formation around the epoch of reionisation ($z\geq6$).
D. Ceverino, S. Glover, R. Klessen
semanticscholar +1 more source
The Planetary Nebula Luminosity Function [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractAlthough the method has no theoretical explanation, the [Oiii]λ5007Å planetary nebula luminosity function (PNLF) is an extremely valuable tool for obtaining accurate (< 10%) extragalactic distances out to ~ 18 Mpc. Because the PNLF works in large galaxies of all Hubble types, it is one of the best tools we have for cross-checking the results
openaire +5 more sources
Consistency between the luminosity function of resolved millisecond pulsars and the galactic center excess [PDF]
, 2017 Fermi Large Area Telescope data reveal an excess of GeV gamma rays from the direction of the Galactic Center and bulge. Several explanations have been proposed for this excess including an unresolved population of millisecond pulsars (MSPs) and self ...
H. Ploeg +3 more
semanticscholar +1 more source
THE GALAXY UV LUMINOSITY FUNCTION BEFORE THE EPOCH OF REIONIZATION [PDF]
Proceedings of the International Astronomical Union, 2015 We present a model for the evolution of the galaxy ultraviolet (UV) luminosity function (LF) across cosmic time where star formation is linked to the assembly of dark matter halos under the assumption of a mass-dependent, but redshift-independent ...
C. Mason, M. Trenti, T. Treu
semanticscholar +1 more source
Tracing Galaxy Evolution by Their Present-Day Luminosity Function
Open Astronomy, 2011 Galaxy luminosity functions are derived for different morphological types and various colors of galaxies, to trace the evolutionary effects which a priori should be different for void and supercluster galaxies.
Tempel E.
doaj +1 more source
The Structure Function of Mid-infrared Variability in Low-redshift Active Galactic Nuclei
The Astrophysical Journal, 2023 Using the multi-epoch mid-infrared (MIR) photometry from the Wide-field Infrared Survey Explorer spanning a baseline of ∼10 yr, we extensively investigate the MIR variability of nearby active galactic nuclei (AGNs) at 0.15 < z < 0.4.
Suyeon Son, Minjin Kim, Luis C. Ho
doaj +1 more source
The Hawaii-AAO K-band Galaxy Redshift Survey -- Paper I: The Local K-band Luminosity Function [PDF]
Astrophys.J.584:203-209,2003, 2002 We present the K-band local luminosity function derived froma sample of 1056 bright (K<15) K-selected galaxies from the Hawaii-AAO K-band redshift survey. The Hawaii-AAO K-band redshift survey covers 4 equatorial fields with a total area of 8.22 $\deg^2$.
arxiv +1 more source
Radio Luminosity Functions [PDF]
Symposium - International Astronomical Union, 1996 Luminosity functions give the space densities of source populations as functions of spectral luminosity. They constrain source physics, clustering, cosmological evolution, and contributions to the radiation background. Extragalactic radio sources span eight decades of luminosity, so dividing them into luminosity ranges effectively separates them by ...
openaire +2 more sources