Results 11 to 20 of about 224,275 (141)
On the mass distribution of stars in the solar neighborhood [PDF]
Serbian Astronomical Journal, 2006 The present authors analyze samples consisting of Hipparcos stars. Based on the corresponding HR diagrams they estimate masses of Main-Sequence stars from their visual magnitudes. They find that already beyond the heliocentric radius of 10 pc the effects
Ninković S., Trajkovska V.
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Luminosity function of GRBs [PDF]
Astronomy & Astrophysics, 2001 We attempt to constrain the luminosity function of Gamma Ray Bursts (GRBs) from the observed number count--flux relation and the afterglow redshift data. We assume three classes of luminosity functions for our analysis: (a) Log-normal distribution, (b) Schechter distribution, and (c) Scale-free distribution. We assume several models of the evolution of
Shiv K. Sethi, S. G. Bhargavi
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Quasar Luminosity Function at z = 7
The Astrophysical Journal Letters, 2023 We present the quasar luminosity function (LF) at z = 7, measured with 35 spectroscopically confirmed quasars at 6.55 < z < 7.15. The sample of 22 quasars from the Subaru High- z Exploration of Low-Luminosity Quasars (SHELLQs) project, combined with 13 ...
Yoshiki Matsuoka +43 more
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The subdwarf luminosity function [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 Using data from the Sloan Digital Sky Survey Early Data Release and SuperCOSMOS Sky Survey scans of POSS-I plates we identify a sample of 2600 subdwarfs using reduced proper motion methods and strict selection criteria. This forms one of the largest and most reliable samples of candidate subdwarfs known, and enables us to determine accurate luminosity ...
Andrew Digby +4 more
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Luminosity function of clusters of galaxies [PDF]
Astronomy & Astrophysics, 2001 15 pages, 14 figures, 4 tables; uses subfigure.sty; accepted for publication in Astronomy and ...
PAOLILLO, MAURIZIO +7 more
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The Hα Luminosity Function of Galaxies at z ∼ 4.5
The Astrophysical Journal, 2023 We present the H α luminosity function (LF) derived from a large sample of Lyman break galaxies at z ∼ 4.5 over the GOODS-South and North fields.
Victoria Bollo +7 more
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Correlation function of the luminosity distances [PDF]
Journal of Cosmology and Astroparticle Physics, 2017 We present the correlation function of the luminosity distances in a flat $ $CDM universe. Decomposing the luminosity distance fluctuation into the velocity, the gravitational potential, and the lensing contributions, we study their individual contributions to the correlation function. The lensing contribution is important at large redshift ($z\gtrsim
Biern, Sang Gyu, Yoo, Jaiyul
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The Astronomical Journal, 2023 The spatial distribution, Galactic model parameters, and luminosity function of cataclysmic variables (CVs) are established using reestimated trigonometric parallaxes from Gaia DR3.
Remziye Canbay +3 more
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The Astrophysical Journal, 2023 We present a novel fully Bayesian analysis to constrain short gamma-ray burst (sGRB) jet structures associated with cocoon, wide-angle, and simple top-hat jet models, as well as the binary neutron star (BNS) merger rate.
Fergus Hayes +5 more
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On the normalized FRB luminosity function [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Thirty-three fast radio bursts (FRBs) had been detected by March 2018. Although the sample size is still limited, meaningful statistical studies can already be carried out. The normalised luminosity function places important constraints on the intrinsic power output, sheds light on the origin(s) of FRBs, and can guide future observations. In this paper,
Bing Zhang +5 more
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