Results 1 to 10 of about 10,763,901 (284)

Quasar Luminosity Function at z = 7 [PDF]

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   +2 more sources

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, Bing Zhang, Rui Luo, Kejia Lee, Kejia Lee, Duncan R. Lorimer   +5 more
openaire   +5 more sources

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
arxiv   +6 more sources

Pulsar Luminosity Function [PDF]

Rev.Mex.Astron.Astrofis.39:267-274,2003, 2002
We construct and investigate the pulsar luminosity function using the new catalogue which includes data for 1315 radio pulsars. The luminosity functions are constructed for 400 and 1400 MHz separately, and they are compared. Also, the luminosity functions excluding the binary millisecond pulsars and other pulsars with low magnetic fields are ...
Guseinov, O. H., Yazgan, E., Ozkan, S., Tagieva, S.   +3 more
arxiv   +3 more sources

The Local [CII] 158 um Emission Line Luminosity Function [PDF]

, 2016
We present, for the first time, the local [CII] 158 um emission line luminosity function measured using a sample of more than 500 galaxies from the Revised Bright Galaxy Sample (RBGS). [CII] luminosities are measured from the Herschel PACS observations of the Luminous Infrared Galaxies in the Great Observatories All-sky LIRG Survey (GOALS) and ...
S. Hemmati, Lin Yan, T. Díaz-Santos, L. Armus, P. Capak, A. Faisst, D. Masters   +6 more
arxiv   +3 more sources

Characterizing the luminosity components of luminous infrared galaxies in multi-wavelength from the X-ray to the far-infrared [PDF]

Scientific Reports
We characterize luminosity components of Ultra/Luminous Infrared Galaxies (U/LIRGs) in multi-wavelength from the X-ray to far-infrared. A set of 63 AGN U/LIRGs was selected where these galaxies are powered by a central active galactic nucleus (AGN ...
Abdallah A. M. Ali, Kamel A. K. Gadallah, Osama. M. Shalabiea, Mohamed. M. Beheary   +3 more
doaj   +2 more sources

The Metallicity Dependence of the Stellar Luminosity and Initial Mass Functions: HST Observations of Open and Globular Clusters [PDF]

, 1996
Using HST and the WFPC2 we have acquired very deep V- and I-band photometry of stars in NGC 2420 and NGC 2477 to study cluster luminosity functions at approximately solar metallicity. We have determined these cluster luminosity functions down to $M_I$ = 10.5 (0.2 M$_{\odot}$) and find that the luminosity function of NGC 2420 turns over at $M_I ...
Ted von Hippel, G. Gilmore, N. R. Tanvir, David Robinson, Derek H. P. Jones   +4 more
arxiv   +2 more sources

The white dwarf luminosity function [PDF]

New Astronomy Reviews, 2016
White dwarfs are the final remnants of low- and intermediate-mass stars. Their evolution is essentially a cooling process that lasts for $\sim 10$ Gyr. Their observed properties provide information about the history of the Galaxy, its dark matter content and a host of other interesting astrophysical problems.
Enrique García-Berro, Terry D. Oswalt
openaire   +5 more sources

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

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
H. Lin, H. K. C. Yee, R. G. Carlberg, S. L. Morris, Marcin Sawicki, David R. Patton, Greg Wirth, C. W. Shepherd   +7 more
openalex   +4 more sources

A new luminosity function for galaxies as given by the mass-luminosity relationship [PDF]

Astron.J.135:1264-1275,2008, 2008
The search for a luminosity function for galaxies both alternative or companion to a Schechter function is a key problem in the reduction of data from catalogs of galaxies. Two luminosity functions for galaxies can be built starting from two distributions of mass as given by the fragmentation. A first overall distribution function is the Kiang function
arxiv   +6 more sources