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The classical 1/Va and PC methods of constructing binned luminosity functions (LFs) are revisited and compared by graphical analysis. Using both theoretical analysis and illustration with an example, we show why the two methods give…

Instrumentation and Methods for Astrophysics · Physics 2015-06-15 Zunli Yuan , Jiancheng Wang

We show that binned differential luminosity functions constructed using the 1/Va method have a significant systematic error for objects close to their parent sample's flux limit(s). This is particularly noticeable when luminosity functions…

Astrophysics · Physics 2009-07-28 M. J. Page , F. J. Carrera

The XMM-LSS, XMM-COSMOS, and XMM-CDFS surveys are complementary in terms of sky coverage and depth. Together, they form a clean sample with the least possible variance in instrument effective areas and PSF. Therefore this is one of the best…

We construct the rest-frame 2--10 keV intrinsic X-ray luminosity function of Active Galactic Nuclei (AGNs) from a combination of X-ray surveys from the all-sky Swift BAT survey to the Chandra Deep Field-South. We use ~3200 AGNs in our…

We measure the rest-frame UV luminosity function (LF) at $z \sim 4$ self-consistently over a wide range in absolute magnitude ($-27 \lesssim M_{\rm UV} \lesssim -20$). The LF is measured with 46,904 sources selected using a photometric…

Astrophysics of Galaxies · Physics 2020-03-18 N. J. Adams , R. A. A. Bowler , M. J. Jarvis , B. Häußler , R. J. McLure , A. Bunker , J. S. Dunlop , A. Verma

We present the LyA emission line luminosity function (LF) of the Active Galactic Nuclei (AGN) in the first release of the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) AGN catalog (Liu et al. 2022, Paper I). The AGN are…

We present a determination of the optical/UV AGN luminosity function and its evolution, based on a large sample of faint (R<24) QSOs identified in the COMBO-17 survey. Using multi-band photometry in 17 filters within 350nm < lambda_obs <…

Astrophysics · Physics 2010-04-06 C. Wolf , L. Wisotzki , A. Borch , S. Dye , M. Kleinheinrich , K. Meisenheimer

We present a determination of the local (z=0) luminosity function of optically selected type 1 (broad-line) Active Galactic Nuclei. Our primary resource is the Hamburg/ESO Survey (HES), which provides a well-defined sample of more than 300…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Andreas Schulze , Lutz Wisotzki , Bernd Husemann

We propose a flexible method for estimating luminosity functions (LFs) based on kernel density estimation (KDE), the most popular nonparametric density estimation approach developed in modern statistics, to overcome issues surrounding…

Methodology · Statistics 2020-05-01 Zunli Yuan , Matt J. Jarvis , Jiancheng Wang

We study the evolution of the luminosity function (LF) of type-1 and type-2 AGN in the mid-infrared, and derive their contribution to the Cosmic InfraRed Background (CIRB) and the expected deep source counts to be observed by Spitzer at 24…

Astrophysics · Physics 2009-11-11 I. Matute , F. La Franca , F. Pozzi , C. Gruppioni , C. Lari , G. Zamorani

In a previous paper (Gavignaud et al. 2006), we presented the type-1 Active Galactic Nuclei (AGN) sample obtained from the first epoch data of the VIMOS-VLT Deep Survey (VVDS). The sample consists of 130 faint, broad-line AGN with redshift…

We propose a mixture evolution scenario to model the evolution of the radio luminosity function (RLF) of steep spectrum AGNs (active galactic nuclei) based on a Bayesian method. In this scenario, the shape of the RLF is determined by both…

High Energy Astrophysical Phenomena · Physics 2016-03-22 Zunli Yuan , Jiancheng Wang , Ming Zhou , Jirong Mao

We present a study of the galaxy Lyman-alpha luminosity function (LF) using a sample of 17 lensing clusters observed by the MUSE/VLT. Magnification from strong gravitational lensing by clusters of galaxies and MUSE apabilities allow us to…

We determine the evolution of the galaxy luminosity function (LF) as a function of spectral type using the Autofib redshift survey, a compendium of over 1700 galaxy redshifts in various magnitude-limited samples spanning b_J=11.5-24.0. To…

Astrophysics · Physics 2015-06-24 Jeremy Heyl , Matthew Colless , Richard S. Ellis , Tom Broadhurst

Almost all massive galaxies today are understood to contain supermassive black holes (SMBH) at their centers. SMBHs grew by accreting material from their surroundings, emitting X-rays as they did so. X-ray Luminosity Functions (XLFs) of…

Astrophysics of Galaxies · Physics 2023-01-16 Ahlam Alqasim , Mat J. Page

We develop a semi-analytic model of hierarchical galaxy formation with an improved treatment of the evolution of galaxies inside dark matter haloes. We take into account not only dynamical friction processes building up the central dominant…

Astrophysics · Physics 2009-11-07 N. Menci , A. Cavaliere , A. Fontana , E. Giallongo , F. Poli

Studies of the high-redshift rest-frame ultraviolet (UV) luminosity functions (LFs) have typically treated the star-forming galaxy and active galactic nuclei (AGN) populations separately, as they have different survey depth and area…

Astrophysics of Galaxies · Physics 2022-10-26 Steven L. Finkelstein , Micaela B. Bagley

We present a new determination of the optical luminosity function (OLF) of active galactic nuclei (AGN) at low redshifts (z<0.15) based on Hubble Space Telescope (HST) observations of X-ray-selected AGN. The HST observations have allowed us…

Astrophysics · Physics 2015-06-24 D. Londish , B. J. Boyle , D. J. Schade

Aims. We aim to study the 250 micron luminosity function (LF) down to much fainter luminosities than achieved by previous efforts. Methods. We developed a modified stacking method to reconstruct the 250 micron LF using optically selected…

Astrophysics of Galaxies · Physics 2016-08-17 L. Wang , P. Norberg , M. Bethermin , N. Bourne , A. Cooray , W. Cowley , L. Dunne , S. Dye , S. Eales , D. Farrah , C. Lacey , J. Loveday , S. Maddox , S. Oliver , M. Viero
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