Results 31 to 40 of about 247,102 (346)

The overdensities of galaxy environments as a function of luminosity and color [PDF]

, 2002
We study the mean environments of galaxies in the Sloan Digital Sky Survey as a function of rest-frame luminosity and color. Overdensities in galaxy number are estimated in $8 h^{-1} \mathrm{Mpc}$ and $1 h^{-1} \mathrm{Mpc}$ spheres centered on $125,000$
Daniel J. Eisenstein, David H. Weinberg, David J. Schlegel, David W. Hogg, Donald G. York, Donald P. Schneider, Driver S. P., Idit Zehavi, Istvan Csabai, James E. Gunn, Jon Brinkmann, Kauffmann G., Michael R. Blanton, Mo H. J., Mo H. J., Neta A. Bahcall, Vila-Costas M. B.   +16 more
core   +2 more sources

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   +4 more sources

The PICS project: II. Circumnebular extinction variations and their effect on the planetary nebula luminosity function

Frontiers in Astronomy and Space Sciences
For decades, the theoretical understanding of planetary nebulae (PNe) has remained in tension with the observed universal bright-end cutoff of the PN luminosity function (PNLF).
Lucas M. Valenzuela, George H. Jacoby, Rhea-Silvia Remus, Marcelo M. Miller Bertolami, Marcelo M. Miller Bertolami, Roberto H. Méndez   +5 more
doaj   +1 more source

Modeling the Near-Infrared Luminosity Functions of Young Stellar Clusters [PDF]

, 1999
We present the results of numerical experiments designed to evaluate the usefulness of near-infrared luminosity functions for constraining the Initial Mass Function (IMF) of young stellar populations.
August A. Muench, Baraffe I., Belikov A. N., Bernasconi P. A., Bessell M. S., Charles J. Lada, D’Antona F., D’Antona F., D’Antona F., Elizabeth A. Lada, Fletcher A. B., Jones H. R. A., Kroupa P., Mazzitelli I., Meageth S. T., Schaller G., Winkler H.   +16 more
core   +3 more sources

Pulsar Luminosity Function

, 2002
12 pages, 9 figures, submitted to A& ...
Guseinov, O. H., Yazgan, E., Ozkan, S., Tagieva, S.   +3 more
openaire   +2 more sources

The luminosity function of field galaxies

, 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.
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
core   +1 more source

The CNOC2 Field Galaxy Luminosity Function. I. A Description of Luminosity Function Evolution

The Astrophysical Journal, 1999
We examine the evolution of the galaxy luminosity function (LF) using a sample of over 2000 galaxies, with 0.12 < z < 0.55 and 17.0 < Rc < 21.5, drawn from the Canadian Network for Observational Cosmology Field Galaxy Redshift Survey (CNOC2), at present the largest such sample at intermediate redshifts. We use UBVRcIc photometry to classify
Lin, H., Yee, H. K. C., Carlberg, R. G., Morris, S. L., Sawicki, M., Patton, D. R., Wirth, G., Shepherd, C. W.   +7 more
openaire   +2 more sources

The Effect of Superpositions on the Planetary Nebula Luminosity Function

The Astrophysical Journal, 2023
Planetary nebula (PN) surveys in systems beyond ∼10 Mpc often find high-excitation, point-like sources with [O iii ] λ 5007 fluxes greater than the apparent bright-end cutoff of the planetary nebula luminosity function (PNLF).
Owen Chase, Robin Ciardullo, Martin M. Roth, George H. Jacoby   +3 more
doaj   +1 more source

How covariant is the galaxy luminosity function?

, 2012
We investigate the error properties of certain galaxy luminosity function (GLF) estimators. Using a cluster expansion of the density field, we show how, for both volume and flux limited samples, the GLF estimates are covariant.
Bardeen, Beijersbergen, Benson, Binggeli, Blanton, Blanton, Bower, Cole, Cole, Cole, Cooray, Croton, Croton, Efstathiou, Faber, Felten, Folkes, Guo, Hu, Hu, Hubble, Ilbert, Kauffmann, Kauffmann, Kim, Kirshner, Lewis, Li, Lima, Loveday, Moore, Norberg, Norberg, Peebles, Press, Robert E. Smith, Robertson, Sandage, Schmidt, Sheth, Smith, Springel, Strauss, Tegmark, Trenti, Turner, Willmer, Yang, Zucca   +48 more
core   +1 more source

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,
Luo, Rui, Lee, Kejia, Lorimer, Duncan R., Zhang, Bing   +3 more
openaire   +3 more sources