Results 11 to 20 of about 10,586,291 (388)

THE PROTOSTELLAR LUMINOSITY FUNCTION [PDF]

The Astrophysical Journal, 2011
The protostellar luminosity function (PLF) is the present-day luminosity function of the protostars in a region of star formation. It is determined using the protostellar mass function (PMF) in combination with a stellar evolutionary model that provides the luminosity as a function of instantaneous and final stellar mass. As in McKee & Offner (2010)
Christopher F. McKee, Stella S. R. Offner   +1 more
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A Left and Right Truncated Schechter Luminosity Function for Quasars

Galaxies, 2017
The luminosity function for quasars (QSOs) is usually fitted by a Schechter function. The dependence of the number of quasars on the redshift, both in the low and high luminosity regions, requires the inclusion of a lower and upper boundary in the ...
Lorenzo Zaninetti
doaj   +4 more sources

Luminosity function of the field galaxies [PDF]

Astrophysics, 2011
Schmidt's method for construction of luminosity function of galaxies is generalized by taking into account the dependence of density of galaxies from the distance in the near Universe. The logarithmical luminosity function (LLF) of field galaxies depending on morphological type is constructed.
A Dressler, A Dressler, A Jr, A Sandage, A Sandage, A. P. Mahtessian, AI Zabludoff, ALB Ribeiro, AP Mahtessian, AP Mahtessian, B Binggeli, B Garilli, B Garilli, BC Bromley, BM Garilli, C Marinoni, CA Valotto, CNA Willmer, D Lynden-Bell, DH Gudehus, E Gaidos, G Efstathiou, H Jerjen, H Lin, H Muriel, HC Ferguson, J Choloniewski, J Huchra, J Loveday, JE Felten, JF Nicol, LF Barrientos, M Paolillo, M Ramella, M Schmidt, MA Arakelyan, MJ Cuesta-Bolao, MM Colless, N Trentham, N Trentham, O Lopez-Cruz, O Lopez-Cruz, P Schechter, PM Lugger, RO Marzke, S Andreon, S Andreon, S Rayzy, SE Zepf, SL Lumsden, SP Driver, T Goto, VYu Terebizh, WR Oegerle, WR Oegerle   +54 more
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Luminosity Function of the Perigalactocentric Region [PDF]

The Astrophysical Journal, 1996
25 pages. Tarred, gzipped and uuencoded. Includes LaTex source file, Figures 3 to 9 and 5 Tables. Figures 1 and 2 are available at ftp://bessel.mps.ohio-state.edu/pub/vijay .
Vijay K. Narayanan, Andrew Gould, Andrew Gould, Darren L. DePoy   +3 more
openaire   +6 more sources

The Nearby Optical Galaxy Sample: The Local Galaxy Luminosity Function [PDF]

, 1999
In this paper we derive the galaxy luminosity function from the Nearby Optical Galaxy (NOG) sample, which is a nearly complete, magnitude-limited ...
C. Marinoni, Pierluigi Monaco, G. Giuricin, B. Costantini   +3 more
openalex   +5 more sources

The Luminosity Function of Galaxies in Some Nearby Clusters

UHD Journal of Science and Technology, 2021
In the present work, the galaxy luminosity function (LF) has been studied for a sample of seven clusters in the redshift range (0.0 ≲ z ≲ 0.1), within Abell radius (1.5 h−1 Mpc), in the five SDSS passbands ugriz.
Mariwan Ahmed Rasheed, Khalid K. Mohammad   +1 more
doaj   +1 more source

The Faint End of the Quasar Luminosity Function at z ∼ 5 from the Subaru Hyper Suprime-Cam Survey [PDF]

Astrophysical Journal, 2020
We present the quasar luminosity function at z ∼ 5 derived from the optical wide-field survey data obtained as a part of the Subaru strategic program (SSP) with the Hyper Suprime-Cam (HSC).
M. Niida, T. Nagao, H. Ikeda, M. Akiyama, Y. Matsuoka, W. He, K. Matsuoka, Y. Toba, M. Onoue, Masakazu A. R. Kobayashi, Y. Taniguchi, H. Furusawa, Y. Harikane, M. Imanishi, N. Kashikawa, T. Kawaguchi, Y. Komiyama, H. Shirakata, Y. Terashima, Y. Ueda   +19 more
semanticscholar   +1 more source

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.
doaj   +1 more source

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
openaire   +4 more sources

The Luminosity Function of M3 [PDF]

The Astrophysical Journal, 1999
We present a high precision, large sample luminosity function (LF) for the Galactic globular cluster M3. With a combination of ground based and Hubble Space Telescope data we cover the entire radial extent of the cluster. The observed LF is well fit by canonical standard stellar models from the red giant branch (RGB) tip to below the main sequence ...
Oscar Straniero, Ben Dorman, R. Buonanno, Francesco R. Ferraro, R. T. Rood, Alessandro Chieffi, F. Fusi Pecci, Eugenio Carretta, Barbara Paltrinieri   +8 more
openaire   +3 more sources