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The calibration of redshift distributions for photometric samples using spectroscopic surveys is plagued by the difficulty in modelling the selection functions of spectroscopic surveys. In this work, we analyse how these selection functions…

Instrumentation and Methods for Astrophysics · Physics 2022-07-19 Isaac McMahon , Markus Michael Rau , Rachel Mandelbaum

The clustering signals of galaxy clusters are known to be powerful tools for self-calibrating the mass-observable relation and are complementary to cluster abundance and lensing. In this work, we explore the possibility of combining three…

Cosmology and Nongalactic Astrophysics · Physics 2023-07-04 Chenxiao Zeng , Andrés N. Salcedo , Hao-Yi Wu , Christopher M. Hirata

We present an infrared adaptation of the Cluster Red-Sequence method. We modify the two filter technique of Gladders & Yee (2000) to identify clusters based on their R-[3.6] color. We apply the technique to the 4 degree^2 Spitzer First Look…

Astrophysics · Physics 2007-05-23 Gillian Wilson , Adam Muzzin , Mark Lacy , the FLS Team

We present a smoothed density-corrected $V_{\rm max}$ technique for building a random catalog for property-dependent galaxy clustering estimation. This approach is essentially based on the density-corrected $V_{\rm max}$ method of…

Cosmology and Nongalactic Astrophysics · Physics 2023-04-27 Lei Yang , Zhigang Li

The Emission Line Galaxy survey made by the Dark Energy Spectroscopic Instrument (DESI) survey will be created from five passes of the instrument on the sky. On each pass, the constrained mobility of the ends of the fibres in the DESI focal…

Cosmology and Nongalactic Astrophysics · Physics 2018-10-15 Davide Bianchi , Angela Burden , Will J. Percival , David Brooks , Robert N. Cahn , Jaime E. Forero-Romero , Michael Levi , Ashley J. Ross , Gregory Tarle

Obtaining accurately calibrated redshift distributions of photometric samples is one of the great challenges in photometric surveys like LSST, Euclid, HSC, KiDS, and DES. We present an inference methodology that combines the redshift…

Cosmology and Nongalactic Astrophysics · Physics 2021-12-09 M. M. Rau , C. B. Morrison , S. J. Schmidt , S. Wilson , R. Mandelbaum , Y. Y. Mao

We present an analysis of the evolution of galaxy clustering in the redshift interval 0<z<4.5 in the HDF-S. The HST optical data are combined with infrared ISAAC/VLT observations, and photometric redshifts are used for all the galaxies…

We present one thousand mock galaxy catalogues for the analysis of the Low Redshift Sample (LOWZ, effective redshift z ~ 10.32) of the Baryon Oscillation Spectroscopic Survey Data Releases 10 and 11. These mocks have been created following…

Galaxy formation inside dark matter halos, as well as the halo formation itself, can be affected by large-scale environments. Evaluating the imprints of environmental effects on galaxy clustering is crucial for precise cosmological…

Astrophysics · Physics 2009-11-13 Ying Zu , Zheng Zheng , G. T. Zhu , Y. P. Jing

We present a physically motivated semi-analytic model to understand the clustering of high redshift Lyman Alpha Emitters (LAEs). We show that the model parameters constrained by the observed luminosity functions, can be used to predict…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Charles Jose , Raghunathan Srianand , Kandaswamy Subramanian

Projection effects, whereby galaxies along the line-of-sight to a galaxy cluster are mistakenly associated with the cluster halo, present a significant challenge for optical cluster cosmology. We use statistically representative spectral…

Cosmology and Nongalactic Astrophysics · Physics 2021-06-04 J. Myles , D. Gruen , A. B. Mantz , S. W. Allen , R. G. Morris , E. Rykoff , M. Costanzi , C. To , J. DeRose , R. H. Wechsler , E. Rozo , T. Jeltema , E. R. Carrasco , A. Kremin , R. Kron

We determine the accuracy of galaxy redshift distributions as estimated from photometric redshift probability distributions $p(z)$. Our method utilises measurements of the angular cross-correlation between photometric galaxies and an…

The uncertainties in photometric redshifts and stellar masses from imaging surveys affect galaxy sample selection, their abundance measurements, as well as the measured weak lensing signals. We develop a framework to assess the systematic…

Astrophysics of Galaxies · Physics 2024-08-12 Navin Chaurasiya , Surhud More , Daichi Kashino , Shogo Masaki , Shogo Ishikawa

We present a galaxy catalog simulator which turns N-body simulations with subhalos into multiband photometric mocks. The simulator assigns galaxy properties to each subhalo to reproduce the observed cluster galaxy halo occupation…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Jeeseon Song , Joseph J. Mohr , Wayne A. Barkhouse , Michael S. Warren , Cody Rude

The data from the Euclid mission will enable the measurement of the photometric redshifts, angular positions, and weak lensing shapes for over a billion galaxies. This large dataset will allow for cosmological analyses using the angular…

This white paper summarizes the conclusions of the Snowmass White Paper "Spectroscopic Needs for Imaging Dark Energy Experiments" (arXiv:1309.5384) which are relevant to the calibration of LSST photometric redshifts; i.e., the accurate…

Instrumentation and Methods for Astrophysics · Physics 2014-10-17 Samuel J. Schmidt , Jeffrey A. Newman , Alexandra Abate , the Spectroscopic Needs White Paper Team

Intrinsic alignments of galaxies have been shown to contaminate weak gravitational lensing observables on linear scales, $r>$ 10 $h^{-1}$Mpc, but studies of alignments in the non-linear regime have thus far been inconclusive. We present an…

Cosmology and Nongalactic Astrophysics · Physics 2016-11-29 Nora Elisa Chisari , Rachel Mandelbaum , Michael A. Strauss , Eric Huff , Neta Bahcall

We present the small-scale (0.2h^{-1} to 7h^{-1} Mpc) cross-correlations between 32,000 luminous early-type galaxies and a reference sample of 16 million normal galaxies from the Sloan Digital Sky Survey. Our method allows us to construct…

The data on spectroscopic galaxy clustering collected by the Dark Energy Spectroscopic Instrument (DESI) will allow the significant detection of subtle features in the galaxy two-point correlation in redshift space, beyond the "standard"…

Cosmology and Nongalactic Astrophysics · Physics 2024-02-19 Camille Bonvin , Francesca Lepori , Sebastian Schulz , Isaac Tutusaus , Julian Adamek , Pablo Fosalba
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