R
Risa H. Wechsler
Researcher at Stanford University
Publications - 572
Citations - 63450
Risa H. Wechsler is an academic researcher from Stanford University. The author has contributed to research in topics: Galaxy & Dark matter. The author has an hindex of 116, co-authored 528 publications receiving 54728 citations. Previous affiliations of Risa H. Wechsler include University of Illinois at Urbana–Champaign & Massachusetts Institute of Technology.
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Journal ArticleDOI
UNIT project: Universe N-body simulations for the Investigation of Theoretical models from galaxy surveys
Chia-Hsun Chuang,Gustavo Yepes,Francisco-Shu Kitaura,Francisco-Shu Kitaura,Marcos Pellejero-Ibanez,Marcos Pellejero-Ibanez,Sergio Rodríguez-Torres,Yu Feng,R. B. Metcalf,R. B. Metcalf,Risa H. Wechsler,Risa H. Wechsler,Cheng Zhao,Cheng Zhao,Chun-Hao To,Chun-Hao To,Shadab Alam,Arka Banerjee,Arka Banerjee,Joseph DeRose,Joseph DeRose,Carlo Giocoli,Alexander Knebe,Alexander Knebe,Guillermo Reyes +24 more
TL;DR: The UNIT $N$-body cosmological simulations project as discussed by the authors was designed to provide precise predictions for nonlinear statistics of the galaxy distribution, including redshift space distortions and cosmic voids.
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Extrinsic Sources of Scatter in the Richness-mass Relation of Galaxy Clusters
Eduardo Rozo,Eli S. Rykoff,Benjamin P. Koester,Brian Nord,Hao-Yi Wu,August E. Evrard,Risa H. Wechsler +6 more
TL;DR: In this paper, the authors use Monte Carlo simulations to study the impact of various sources of observational scatter on the richness-mass relation of galaxy clusters and demonstrate that variations in cluster environments can rarely (≈1%-5% of the time) result in significant richness boosts.
Journal ArticleDOI
Modelling the Transfer Function for the Dark Energy Survey
Chihway Chang,M. T. Busha,Risa H. Wechsler,A. Refregier,A. Amara,E. Rykof,Matthew R. Becker,Claudio Bruderer,Lukas Gamper,Boris Leistedt,Hiranya V. Peiris,T. M. C. Abbott,F. B. Abdalla,Eduardo Balbinot,M. Banerji,Rebecca A. Bernstein,E. Bertin,David J. Brooks,A. Carnero Rosell,S. Desai,L. N. da Costa,Carlos E. Cunha,Tim Eifler,August E. Evrard,A. Fausti Neto,D. W. Gerdes,Daniel Gruen,D. James,K. Kuehn,M. A. G. Maia,Martin Makler,R. L. C. Ogando,A. A. Plazas,E. Sánchez,Basilio X. Santiago,Michael Schubnell,I. Sevilla-Noarbe,Chris Smith,Marcelle Soares-Santos,E. Suchyta,M. E. C. Swanson,G. Tarle,J. Zuntz +42 more
TL;DR: A forward-modeling simulation framework designed to model the data products from the Dark Energy Survey (DES) provides a powerful tool for systematics studies that is sufficiently realistic and highly controllable.
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Evaluation of probabilistic photometric redshift estimation approaches for the Rubin Observatory Legacy Survey of Space and Time (LSST)
S. J. Schmidt,A.I. Malz,A.I. Malz,John Y. H. Soo,Ibrahim Almosallam,Massimo Brescia,Stefano Cavuoti,Johann Cohen-Tanugi,Andrew J. Connolly,J. DeRose,Peter E. Freeman,Melissa L. Graham,Kartheik Iyer,Kartheik Iyer,Matt J. Jarvis,Matt J. Jarvis,J.B. Kalmbach,Eve Kovacs,Ann B. Lee,Giuseppe Longo,Christopher B. Morrison,Jeffrey A. Newman,Erfan Nourbakhsh,Eric Nuss,Taylor Pospisil,H. Tranin,Risa H. Wechsler,Risa H. Wechsler,Rongpu Zhou,Rongpu Zhou,Rafael Izbicki +30 more
TL;DR: In this paper, the results of a comprehensive experiment comparing 12 photo-z algorithms applied to mock data produced for The Rubin Observatory Legacy Survey of Space and Time Dark Energy Science Collaboration are presented.
Journal ArticleDOI
The Aemulus Project I: Numerical Simulations for Precision Cosmology.
J. DeRose,Risa H. Wechsler,Jeremy L. Tinker,Matthew R. Becker,Yao-Yuan Mao,Thomas McClintock,Sean McLaughlin,Eduardo Rozo,Zhongxu Zhai +8 more
TL;DR: The AEMULUS project as discussed by the authors is a collaboration devoted to precision emulation of galaxy survey observables, including galaxy projected correlation functions, galaxy clustering in redshift space, and matter and halo correlation functions and power spectra.