Results 51 to 60 of about 10,586,291 (388)
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 ...
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Luminosity Functions of Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1997 Planetary nebulae have recently been shown to be useful as standard candles (Ciardullo et al. 1989, ApJ, 339, 53; Jacoby 1989, ApJ, 339, 39). Distances to many galaxies have been determined by fitting a planetary nebula luminosity function (PNLF) to observations of the OIII 5007å line of PNe.
Marcelle Tremblay, Sun Kwok
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The CALYMHA survey : Lyα luminosity function and global escape fraction of Lyα photons at z = 2.23 [PDF]
, 2016 We present the CAlibrating LYMan-α with Hα (CALYMHA) pilot survey and new results on Lyman α (Lyα) selected galaxies at z ∼ 2. We use a custom-built Lyα narrow-band filter at the Isaac Newton Telescope, designed to provide a matched volume coverage to ...
D. Sobral +8 more
semanticscholar +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
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The ISO 170um Luminosity Function of Galaxies [PDF]
, 2005 We constructed a local luminosity function (LF) of galaxies using a flux-limited sample (S_170 > 0.195Jy) of 55 galaxies at z < 0.3 taken from the ISO FIRBACK survey at 170um.
Dennefeld, Michel +5 more
core +2 more sources
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.
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On the origin of the galaxy luminosity function [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 Evidence is summarized that suggests that when a protogalaxy collapses, a fraction $f$ of its gas fails to heat to the virial temperature, where $f$ is large for haloes less massive than the value $M^*$ associated with $L^*$ galaxies. Stars and galaxies form only from the cool gas fraction.
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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 white dwarf luminosity function. I. Statistical errors and alternatives [PDF]
, 2006 Over the years, several methods have been proposed to compute galaxy luminosity functions, from the most simple ones -counting sample objects inside a given volume- to very sophisticated ones -like the C- method, the STY method or the Choloniewski method,
Abazajian +59 more
core +3 more sources
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
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