Results 21 to 30 of about 5,279,442 (297)

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, Masafusa Onoue, Kazushi Iwasawa, Michael A. Strauss, Nobunari Kashikawa, Takuma Izumi, Tohru Nagao, Masatoshi Imanishi, Masayuki Akiyama, John D. Silverman, Naoko Asami, James Bosch, Hisanori Furusawa, Tomotsugu Goto, James E. Gunn, Yuichi Harikane, Hiroyuki Ikeda, Kohei Inayoshi, Rikako Ishimoto, Toshihiro Kawaguchi, Satoshi Kikuta, Kotaro Kohno, Yutaka Komiyama, Chien-Hsiu Lee, Robert H. Lupton, Takeo Minezaki, Satoshi Miyazaki, Hitoshi Murayama, Atsushi J. Nishizawa, Masamune Oguri, Yoshiaki Ono, Taira Oogi, Masami Ouchi, Paul A. Price, Hiroaki Sameshima, Naoshi Sugiyama, Philip J. Tait, Masahiro Takada, Ayumi Takahashi, Tadafumi Takata, Masayuki Tanaka, Yoshiki Toba, Shiang-Yu Wang, Takuji Yamashita   +43 more
doaj   +1 more source

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 ...
Digby, Andrew P., Hambly, Nigel C., Cooke, John A., Reid, I. Neill, Cannon, Russell D.   +4 more
openaire   +2 more sources

Luminosity functions of cluster galaxies [PDF]

Astronomy & Astrophysics, 2018
We derive NUV luminosity functions for 6471 NUV detected galaxies in 28 0.02 < z < 0.08 clusters and consider their dependence on cluster properties. We consider optically red and blue galaxies and explore how their NUV LFs vary in several cluster subsamples, selected to best show the influence of environment.
Roberto De Propris, Malcolm N. Bremer, Steven Phillipps   +2 more
openaire   +3 more sources

The Properties and Luminosity Function of Extremely Low Luminosity Galaxies [PDF]

The Astrophysical Journal, 2005
We examine a sample of low redshift (10 < d < 150 Mpc) galaxies including galaxies with r-band absolute magnitudes as faint as -12.5 (for h=1), selected from the Sloan Digital Sky Survey Data Release 2 (SDSS). The sample is unique in containing galaxies of extremely low luminosities in a wide range of environments, selected with uniform and well ...
Blanton, Michael R., Lupton, Robert H., Schlegel, David J., Strauss, Michael A., Brinkmann, J., Fukugita, Masataka, Loveday, Jon   +6 more
openaire   +2 more sources

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
openaire   +1 more source

EVOLUTION OF THE Hα LUMINOSITY FUNCTION [PDF]

The Astrophysical Journal, 2009
26 pages, 23 figures, submitted to ApJ; version with high resolution figures available at http://www.cfa.harvard.edu/~ewestra/publications/
Westra, Eduard, Geller, Margaret J., Kurtz, Michael J., Fabricant, Daniel G., Dell'Antonio, Ian   +4 more
openaire   +2 more sources

The establishment of the luminosity function for brown dwarf candidates in GAIA Early Data Release 3

, 2022
Gizis, John E.Brown dwarfs are classified as objects with masses between that of stars and planets. First theorized in the 1960s, they remained an elusive target for detection until the mid 1990s since they have no sustainable energy source therefore ...
Hilligoss, Dylan M.
core   +1 more source

Galaxy And Mass Assembly (GAMA) : the galaxy luminosity function within the cosmic web [PDF]

, 2015
EE acknowledges support from the Science and Technology Facilities Council. TMR acknowledges support from a ERC Starting Grant (DEGAS-259586). CH acknowledges support from the ERC under the EC FP7 grant number 240185.
Loveday, J, Baldry, I., E Eardley (16219808), T McNaught-Roberts (16161611), Driver, S. P., M E Cluver (16161572), M Alpaslan (16114469), I Baldry (16191140), Robotham, ASG, Robotham, A., Liske, J, Jonathan Loveday (4460899), Norberg, P, Driver, S.P., Eardley, E, Brough, S ; https://orcid.org/, Alpaslan, M., J Bland-Hawthorn (16111139), D J Farrow (16219811), Farrow, DJ, A S G Robotham (16143614), McNaught-Roberts, T., Brough, S., Loveday, J., Driver, SP, Liske, J., Farrow, D., Heymans, C, P Norberg (16143575), Peacock, JA, Alpaslan, M, J A Peacock (16045217), Robotham, A. S. G., Heymans, C., Bland-Hawthorn, J., Farrow, D. J., Bland-Hawthorn, J, Robotham, A.S.G., Baldry, I, Farrow, D.J., Peacock, J. A., Cluver, M., Driver, S., S Brough (16143590), McNaught-Roberts, T, Peacock, J.A., Norberg, P., J Liske (7814738), Eardley, E., Cluver, ME, Peacock, J., Cluver, M.E., C Heymans (16161599), Cluver, M. E., S P Driver (16143581)   +54 more
core   +1 more source

Absolute luminosity measurements with the LHCb detector at the LHC [PDF]

, 2012
Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the ...
Reid, Matthew M., Back, J. J., Harrison, P. F., Pilar, T., Dossett, D., HASH(0x55a67fec9620), Williams, M. P., Latham, Thomas, Whitehead, M. (Mark), Gershon, T. J., Poluektov, Anton, Kreps, Michal   +11 more
core   +1 more source

Period-Luminosity-Colour distribution and classification of Galactic oxygen-rich LPVs I. Luminosity calibrations [PDF]

, 1999
The absolute K magnitudes and kinematic parameters of about 350 oxygen-rich Long-Period Variable stars are calibrated, by means of an up-to-date maximum-likelihood method, using HIPPARCOS parallaxes and proper motions together with radial velocities and,
X. Luri, Barthès, D., Luri, Xavier, Luri Carrascoso, Xavier, Alvarez, R., Mennessier, Marie Odile, Mennessier, M. O., Alvarez, Rodrigo, R. Alvarez, M. O. Mennessier, D. Barthès, I. Luminosity Calibrations   +11 more
core   +1 more source