Galaxy Formation and Cosmology Group

GFC-led papers

1. [2511.02031] Shaping the Milky Way. II. The dark matter halo's response to the LMC's passage in a cosmological context (Nov 3, 2025)
   Elise Darragh-Ford, Nicolas Garavito-Camargo, Arpit Arora, Risa H. Wechsler, Phil Mansfield, Gurtina Besla, Michael S. Petersen, Martin D. Weinberg, Silvio Varela-Lavin, Deveshi Buch, Emily C. Cunningham, Kathryne J. Daniel, Facundo A. Gomez, Kathryn V. Johnston, Chervin F. P. Laporte, Yao-Yuan Mao, Ethan O. Nadler, Robyn Sanderson
   
   
2. [2510.24591] ReplicationBench: Can AI Agents Replicate Astrophysics Research Papers? (Oct 28, 2025)
   Christine Ye, Sihan Yuan, Suchetha Cooray, Steven Dillmann, Ian L. V. Roque, Dalya Baron, Philipp Frank, Sergio Martin-Alvarez, Nolan Koblischke, Frank J Qu, Diyi Yang, Risa Wechsler, Ioana Ciuca
   
   
3. [2509.20444] SAGAbg III: Environmental Stellar Mass Functions, Self-Quenching, and the Stellar-to-Halo Mass Relation in the Dwarf Galaxy Regime (Sep 24, 2025)
   Erin Kado-Fong, Yao-Yuan Mao, Yasmeen Asali, Marla Geha, Risa H. Wechsler, Mithi A. C. de los Reyes, Yunchong Wang, Ethan O. Nadler, Nitya Kallivayalil, Erik J. Tollerud, Benjamin Weiner
   
   
4. [2508.02837] Memoirs of mass accretion: probing the edges of intracluster light in simulated galaxy clusters (Aug 4, 2025)
   Tara Dacunha, Phil Mansfield, Risa Wechsler
   
   
5. [2507.13448] Dwarf Galaxies at Cosmic Noon: New JWST Constraints on Satellite Models and Subhalo Tidal Evolution (Jul 17, 2025)
   Jenny T. Wan, Philip Mansfield, Katherine A. Suess, Yunchong Wang, Sihan Yuan, Christina C. Williams, Risa H. Wechsler
   
   
6. [2506.03245] The Pandora project. II: how non-thermal physics drives bursty star formation and temperate mass-loaded outflows in dwarf galaxies (Jun 3, 2025)
   Sergio Martin-Alvarez, Debora Sijacki, Martin G. Haehnelt, Alice Concas, Yuxuan Yuan, Roberto Maiolino, Risa H. Wechsler, Francisco Rodríguez Montero, Marion Farcy, Mahsa Sanati, Yohan Dubois, Joki Rosdahl, Enrique Lopez-Rodriguez, Susan E. Clark
   
   
7. [2504.11687] The Cocytos Stream: A Disrupted Globular Cluster from our Last Major Merger? (Apr 16, 2025)
   Christian Aganze, Vedant Chandra, Risa H. Wechsler, Ting S. Li, Sergey E. Koposov, Leandro Beraldo Silva, Andreia Carrillo, Alexander H. Riley, Monica Valluri, Oleg Y. Gnedin, Mairead Heiger, Constance Rockosi, Raymond Carlberg, Amanda Byström, Namitha Kizhuprakkat, Mika Lambert, Bokyoung Kim, Gustavo Medina Toledo, Carlos Allende Prieto, Jessica Nicole Aguilar, Steven Ahlen, Davide Bianchi, David Brooks, Todd T. Claybaugh, Andrew P. Cooper, Axel de la Macorra, Arjun Dey, Peter Doel, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya A. Gontcho, Gaston Gutierrez, Mustapha Ishak, Theodore Kisner, Anthony Kremin, Ofer Lahav, Martin Landriau, Laurent Le Guillou, Aaron Meisner, Ramon Miquel, Nathalie Palanque-Delabrouille, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, Michael Schubnell, David Sprayberry, Gregory Tarlé, Benjamin A. Weaver, Hu Zou
   
   
8. [2412.06886] How do uncertainties in galaxy formation physics impact field-level galaxy bias? (Dec 9, 2024)
   Mahlet Shiferaw, Nickolas Kokron, Risa H. Wechsler
   
   
9. [2408.01487] EDEN: Exploring Disks Embedded in N-body simulations of Milky-Way-mass halos from Symphony (Aug 2, 2024)
   Yunchong Wang, Philip Mansfield, Ethan O. Nadler, Elise Darragh-Ford, Risa H. Wechsler, Daneng Yang, Hai-Bo Yu
   
   
10. [2404.14500] The SAGA Survey. V. Modeling Satellite Systems around Milky Way-mass Galaxies with Updated UniverseMachine (Apr 22, 2024)
    Yunchong Wang, Ethan O. Nadler, Yao-Yuan Mao, Risa H. Wechsler, Tom Abel, Peter Behroozi, Marla Geha, Yasmeen Asali, Mithi A. C. de los Reyes, Erin Kado-Fong, Nitya Kallivayalil, Erik J. Tollerud, Benjamin Weiner, John F. Wu
    
    
11. [2310.09329] Unraveling emission line galaxy conformity at z~1 with DESI early data (Oct 13, 2023)
    Sihan Yuan, Risa H. Wechsler, Yunchong Wang, Mithi A. C. de los Reyes, Justin Myles, Antoine Rocher, Boryana Hadzhiyska, Jessica Nicole Aguilar, Steven Ahlen, David Brooks, Todd Claybaugh, Shaun Cole, Axel de la Macorra, Jaime E. Forero-Romero, Satya Gontcho A Gontcho, Julien Guy, Klaus Honscheid, Theodore Kisner, Michael Levi, Marc Manera, Aaron Meisner, Ramon Miquel, John Moustakas, Jundan Nie, Nathalie Palanque-Delabrouille, Claire Poppett, Mehdi Rezaie, Ashley J. Ross, Graziano Rossi, Eusebio Sanchez, Michael Schubnel, Hee- Jong Seo, Gregory Tarlé, Benjamin Alan Weaver, Zhimin Zhou
    
    
12. [2310.04501] Robust cosmological inference from non-linear scales with k-th nearest neighbor statistics (Oct 6, 2023)
    Sihan Yuan, Tom Abel, Risa H. Wechsler
    
    
13. [2308.10926] Symfind: Addressing the Fragility of Subhalo Finders and Revealing the Durability of Subhalos (Aug 21, 2023)
    Philip Mansfield, Elise Darragh-Ford, Yunchong Wang, Ethan O. Nadler, Risa H. Wechsler
    
    
14. [2306.06314] The DESI One-Percent Survey: Exploring the Halo Occupation Distribution of Luminous Red Galaxies and Quasi-Stellar Objects with AbacusSummit (Jun 9, 2023)
    Sihan Yuan, Hanyu Zhang, Ashley J. Ross, Jamie Donald-McCann, Boryana Hadzhiyska, Risa H. Wechsler, Zheng Zheng, Shadab Alam, Violeta Gonzalez-Perez, Jessica Nicole Aguilar, Steven Ahlen, Davide Bianchi, David Brooks, Axel de la Macorra, Kevin Fanning, Jaime E. Forero-Romero, Klaus Honscheid, Mustapha Ishak, Robert Kehoe, James Lasker, Martin Landriau, Marc Manera, Paul Martini, Aaron Meisner, Ramon Miquel, John Moustakas, Seshadri Nadathur, Jeffrey A. Newman, Jundan Nie, Will Percival, Claire Poppett, Antoine Rocher, Graziano Rossi, Eusebio Sanchez, Lado Samushia, Michael Schubnell, Hee-Jong Seo, Gregory Tarle, Benjamin Alan Weaver, Jiaxi Yu, Zhimin Zhou, Hu Zou
    
    
15. [2304.10403] Anisotropic Satellite Galaxy Quenching: A Unique Signature of Energetic Feedback by Supermassive Black Holes? (Apr 20, 2023)
    Juliana S. M. Karp, Johannes U. Lange, Risa H. Wechsler
    
    
16. [2212.07433] Target Selection and Sample Characterization for the DESI LOW-Z Secondary Target Program (Dec 14, 2022)
    Elise Darragh-Ford, John F. Wu, Yao-Yuan Mao, Risa H. Wechsler, Marla Geha, Jaime E. Forero-Romero, ChangHoon Hahn, Nitya Kallivayalil, John Moustakas, Ethan O. Nadler, Marta Nowotka, J. E. G. Peek, Erik J. Tollerud, Benjamin Weiner, J. Aguilar, S. Ahlen, D. Brooks, A. P. Cooper, A. de la Macorra, A. Dey, K. Fanning, A. Font-Ribera, S. Gontcho A Gontcho, K. Honscheid, T. Kisner, Anthony Kremin, M. Landriau, Michael E. Levi, P. Martini, Aaron M. Meisner, R. Miquel, Adam D. Myers, Jundan Nie, N. Palanque-Delabrouille, W. J. Percival, F. Prada, D. Schlegel, M. Schubnell, Gregory Tarlé, M. Vargas-Magaña, Zhimin Zhou, H. Zou
    
    
17. [2203.11963] Stringent $σ_8$ constraints from small-scale galaxy clustering using a hybrid MCMC+emulator framework (Mar 22, 2022)
    Sihan Yuan, Lehman H. Garrison, Daniel J. Eisenstein, Risa H. Wechsler
    
    
18. [2203.00690] From Images to Dark Matter: End-To-End Inference of Substructure From Hundreds of Strong Gravitational Lenses (Mar 1, 2022)
    Sebastian Wagner-Carena, Jelle Aalbers, Simon Birrer, Ethan O. Nadler, Elise Darragh-Ford, Philip J. Marshall, Risa H. Wechsler
    
    
19. [2112.00012] Priors on red galaxy stochasticity from hybrid effective field theory (Nov 30, 2021)
    Nickolas Kokron, Joseph DeRose, Shi-Fan Chen, Martin White, Risa H. Wechsler
    
    
20. [2111.08714] Early-type galaxy density profiles from IllustrisTNG: III. Effects on outer kinematic structure (Nov 16, 2021)
    Yunchong Wang, Shude Mao, Mark Vogelsberger, Volker Springel, Lars Hernquist, Risa Wechsler, ., Tsinghua, Stanford, MIT, MPA, Harvard, SLAC
    
    
21. [2106.05976] lenstronomy II: A gravitational lensing software ecosystem (Jun 10, 2021)
    Simon Birrer, Anowar J. Shajib, Daniel Gilman, Aymeric Galan, Jelle Aalbers, Martin Millon, Robert Morgan, Giulia Pagano, Ji Won Park, Luca Teodori, Nicolas Tessore, Madison Ueland, Lyne Van de Vyvere, Sebastian Wagner-Carena, Ewoud Wempe, Lilan Yang, Xuheng Ding, Thomas Schmidt, Dominique Sluse, Ming Zhang, Adam Amara
    
    
22. [2105.12105] ADDGALS: Simulated Sky Catalogs for Wide Field Galaxy Surveys (May 25, 2021)
    Risa H. Wechsler, Joseph DeRose, Michael T. Busha, Matthew R. Becker, Eli Rykoff, August Evrard
    
    
23. [2102.11876] UniverseMachine: Predicting Galaxy Star Formation over Seven Decades of Halo Mass with Zoom-in Simulations (Feb 23, 2021)
    Yunchong Wang, Ethan O. Nadler, Yao-Yuan Mao, Susmita Adhikari, Risa H. Wechsler, Peter Behroozi
    
    
24. [2101.11014] The cosmology dependence of galaxy clustering and lensing from a hybrid $N$-body-perturbation theory model (Jan 26, 2021)
    Nickolas Kokron, Joseph DeRose, Shi-Fan Chen, Martin White, Risa H. Wechsler
    
    
25. [2101.07810] Dark Matter Constraints from a Unified Analysis of Strong Gravitational Lenses and Milky Way Satellite Galaxies (Jan 19, 2021)
    Ethan O. Nadler, Simon Birrer, Daniel Gilman, Risa H. Wechsler, Xiaolong Du, Andrew Benson, Anna M. Nierenberg, Tommaso Treu
    
    
26. [2012.00099] Searching for Dwarf Galaxies in ${\it Gaia}$ DR2 Phase-Space Data Using Wavelet Transforms (Nov 30, 2020)
    Elise Darragh-Ford, Ethan O. Nadler, Sean McLaughlin, Risa H. Wechsler
    
    
27. [2010.13787] Hierarchical Inference With Bayesian Neural Networks: An Application to Strong Gravitational Lensing (Oct 26, 2020)
    Sebastian Wagner-Carena, Ji Won Park, Simon Birrer, Philip J. Marshall, Aaron Roodman, Risa H. Wechsler
    
    
28. [2001.08754] Signatures of Velocity-Dependent Dark Matter Self-Interactions in Milky Way-mass Halos (Jan 23, 2020)
    Ethan O. Nadler, Arka Banerjee, Susmita Adhikari, Yao-Yuan Mao, Risa H. Wechsler
    
    
29. [1910.01656] RedMaPPer: Evolution and Mass Dependence of the Conditional Luminosity Functions of Red Galaxies in Galaxy Clusters (Oct 3, 2019)
    Chun-Hao To, Rachel M. Reddick, Eduardo Rozo, Eli Rykoff, Risa H. Wechsler
    
    
30. [1904.10000] Constraints on Dark Matter Microphysics from the Milky Way Satellite Population (Apr 22, 2019)
    Ethan O. Nadler, Vera Gluscevic, Kimberly K. Boddy, Risa H. Wechsler
    
    
31. [1901.02401] The Buzzard Flock: Dark Energy Survey Synthetic Sky Catalogs (Jan 8, 2019)
    Joseph DeRose, Risa H. Wechsler, Matthew R. Becker, Michael T. Busha, Eli S. Rykoff, Niall MacCrann, Brandon Erickson, August E. Evrard, Andrey Kravtsov, Daniel Gruen, Sahar Allam, Santiago Avila, Sarah Bridle, David Brooks, Elizabeth Buckley-Geer, Aurelio Carnero Rosell, Matias Carrasco Kind, Jorge Carretero, Francisco J. Castander, Ross Cawthon, Martin Crocce, Luiz N. da Costa, Christopher Davis, Juan De Vicente, Jörg P. Dietrich, Peter Doel, Alex Drlica-Wagner, Pablo Fosalba, Josh Frieman, Juan Garcia-Bellido, Gaston Gutierrez, Will G. Hartley, Devon L. Hollowood, Ben Hoyle, David J. James, Elisabeth Krause, Kyler Kuehn, Nikolay Kuropatkin, Marcos Lima, Marcio A. G. Maia, Felipe Menanteau, Christopher J. Miller, Ramon Miquel, Ricardo L. C. Ogando, Andrés Plazas Malagón, A. Kathy Romer, Eusebio Sanchez, Rafe Schindler, Santiago Serrano, Ignacio Sevilla-Noarbe, Mathew Smith, Eric Suchyta, Molly E. C. Swanson, Gregory Tarle, Vinu Vikram
    
    
32. [1811.02111] UNIT project: Universe $N$-body simulations for the Investigation of Theoretical models from galaxy surveys (Nov 6, 2018)
    Chia-Hsun Chuang, Gustavo Yepes, Francisco-Shu Kitaura, Marcos Pellejero-Ibanez, Sergio Rodriguez-Torres, Yu Feng, R. Benton Metcalf, Risa H. Wechsler, Cheng Zhao, Chun-Hao To, Shadab Alam, Arka Banerjee, Joseph DeRose, Carlo Giocoli, Alexander Knebe, Guillermo Reyes
    
    
33. [1809.05542] Modeling the Connection Between Subhalos and Satellites in Milky Way-like Systems (Sep 14, 2018)
    Ethan O. Nadler, Yao-Yuan Mao, Gregory M. Green, Risa H. Wechsler
    
    
34. [1804.05865] The Aemulus Project I: Numerical Simulations for Precision Cosmology (Apr 16, 2018)
    Joseph DeRose, Risa H. Wechsler, Jeremy L. Tinker, Matthew R. Becker, Yao-Yuan Mao, Thomas McClintock, Sean McLaughlin, Eduardo Rozo, Zhongxu Zhai
    
    
35. [1804.03097] The Connection between Galaxies and their Dark Matter Halos (Apr 9, 2018)
    Risa H. Wechsler, Jeremy L. Tinker
    
    
36. [1712.04467] Modeling the Impact of Baryons on Subhalo Populations with Machine Learning (Dec 12, 2017)
    Ethan O. Nadler, Yao-Yuan Mao, Risa H. Wechsler, Shea Garrison-Kimmel, Andrew Wetzel
    
    
37. [1612.01029] On the galaxy-halo connection in the EAGLE simulation (Dec 3, 2016)
    Harry Desmond, Yao-Yuan Mao, Risa Wechsler, Robert Crain, Joop Schaye
    
    
38. [1604.04670] The Faber-Jackson relation and Fundamental Plane from halo abundance matching (Apr 16, 2016)
    Harry Desmond, Risa H. Wechsler
    
    
39. [1601.07905] The Eating Habits of Milky Way Mass Halos: Destroyed Dwarf Satellites and the Metallicity Distribution of Accreted Stars (Jan 28, 2016)
    Alis J. Deason, Yao-Yuan Mao, Risa H. Wechsler
    
    
40. [1506.00169] The Tully-Fisher and mass-size relations from halo abundance matching (May 30, 2015)
    Harry Desmond, Risa H. Wechsler
    
    
41. [1503.08833] Connecting CO Intensity Mapping to Molecular Gas and Star Formation in the Epoch of Galaxy Assembly (Mar 30, 2015)
    Tony Y. Li, Risa H. Wechsler, Kiruthika Devaraj, Sarah E. Church
    
    
42. [1503.02637] The Dependence of Subhalo Abundance on Halo Concentration (Mar 9, 2015)
    Yao-Yuan Mao, Marc Williamson, Risa H. Wechsler
    
    
43. [1402.2036] Formation of disk galaxies in preheated media: a preventative feedback model (Feb 10, 2014)
    Yu Lu, H. J. Mo, Risa H. Wechsler
    
    
44. [1312.3233] A Comparison between Semi-Analytic Model Predictions for the CANDELS Survey (Dec 11, 2013)
    Yu Lu, Risa H. Wechsler, Rachel S. Somerville, Darren Croton, Lauren Porter, Joel Primack, Peter S. Behroozi, Henry C. Ferguson, David C. Koo, Yicheng Guo, Mohammadtaher Safarzadeh, Kristian Finlator, Marco Castellano, Catherine E. White, Veronica Sommariva, Chris Moody
    
    
45. [1306.4686] Cosmological Constraints from Galaxy Clustering and the Mass-to-Number Ratio of Galaxy Clusters: Marginalizing over the Physics of Galaxy Formation (Jun 19, 2013)
    Rachel Reddick, Jeremy Tinker, Risa Wechsler, Yu Lu
    
    
46. [1306.2971] Reionization Histories of Milky Way Mass Halos (Jun 12, 2013)
    Tony Y. Li, Marcelo A. Alvarez, Risa H. Wechsler, Tom Abel
    
    
47. [1304.6401] Connecting Direct Dark Matter Detection Experiments to Cosmologically Motivated Halo Models (Apr 23, 2013)
    Yao-Yuan Mao, Louis E. Strigari, Risa H. Wechsler
    
    
48. [1210.2721] Halo-to-Halo Similarity and Scatter in the Velocity Distribution of Dark Matter (Oct 9, 2012)
    Yao-Yuan Mao, Louis E. Strigari, Risa H. Wechsler, Hao-Yi Wu, Oliver Hahn
    
    
49. [1208.0334] Unbound Particles in Dark Matter Halos (Aug 1, 2012)
    Peter S. Behroozi, Abraham Loeb, Risa H. Wechsler
    
    
50. [1207.6105] The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8 (Jul 25, 2012)
    Peter S. Behroozi, Risa H. Wechsler, Charlie Conroy
    
    
51. [1207.3347] Spectroscopic failures in photometric redshift calibration: cosmological biases and survey requirements (Jul 13, 2012)
    Carlos E. Cunha, Dragan Huterer, Huan Lin, Michael T. Busha, Risa H. Wechsler
    
    
52. [1207.2160] The Connection between Galaxies and Dark Matter Structures in the Local Universe (Jul 9, 2012)
    Rachel M. Reddick, Risa H. Wechsler, Jeremy L. Tinker, Peter S. Behroozi
    
    
53. [1111.2611] The Cosmic Abundance of Classical Milky Way Satellites (Nov 10, 2011)
    Louis E. Strigari, Risa H. Wechsler
    
    
54. [1110.4370] Gravitationally Consistent Halo Catalogs and Merger Trees for Precision Cosmology (Oct 19, 2011)
    Peter S. Behroozi, Risa H. Wechsler, Hao-Yi Wu, Michael T. Busha, Anatoly A. Klypin, Joel R. Primack
    
    
55. [1110.4372] The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores (Oct 19, 2011)
    Peter S. Behroozi, Risa H. Wechsler, Hao-Yi Wu
    
    
56. [1109.5691] Sample variance in photometric redshift calibration: cosmological biases and survey requirements (Sep 26, 2011)
    Carlos E. Cunha, Dragan Huterer, Michael T. Busha, Risa H. Wechsler
    
    
57. [1011.2255] How Common are the Magellanic Clouds? (Nov 10, 2010)
    Lulu Liu, Brian F. Gerke, Risa H. Wechsler, Peter S. Behroozi, Michael T. Busha
    
    
58. [1001.0015] A Comprehensive Analysis of Uncertainties Affecting the Stellar Mass - Halo Mass Relation for 0<z<4 (Jan 3, 2010)
    Peter S. Behroozi, Charlie Conroy, Risa H. Wechsler
    
    
59. [0910.3668] The Impact of Theoretical Uncertainties in the Halo Mass Function and Halo Bias on Precision Cosmology (Oct 20, 2009)
    Hao-Yi Wu, Andrew R. Zentner, Risa H. Wechsler
    
    
60. [0907.2690] Annealing a Follow-up Program: Improvement of the Dark Energy Figure of Merit for Optical Galaxy Cluster Surveys (Jul 16, 2009)
    Hao-Yi Wu, Eduardo Rozo, Risa H. Wechsler
    
    
61. [0803.1491] The Effects of Halo Assembly Bias on Self-Calibration in Galaxy Cluster Surveys (Mar 11, 2008)
    Hao-Yi Wu, Eduardo Rozo, Risa H. Wechsler
    
    
62. [0512416] The Dependence of Halo Clustering on Halo Formation History, Concentration, and Occupation (Dec 16, 2005)
    Risa H. Wechsler, Andrew R. Zentner, James S. Bullock, Andrey V. Kravtsov, Brandon Allgood
    
    
63. [0111069] Concentrations and Assembly Histories of Dark Matter Halos (Nov 5, 2001)
    Risa H. Wechsler, James S. Bullock, J. R. Primack, Andrey V. Kravtsov, Avishai Dekel
    
    
64. [0108151] Concentrations of Dark Halos from their Assembly Histories (Aug 9, 2001)
    Risa H. Wechsler, James S. Bullock, Joel R. Primack, Andrey V. Kravtsov, Avishai Dekel
    
    
65. [0011261] Galaxy Formation at z~3: Constraints from Spatial Clustering (Nov 14, 2000)
    Risa H. Wechsler, Rachel S. Somerville, James S. Bullock, Tsafrir S. Kolatt, Joel R. Primack, George R. Blumenthal, Avishai Dekel
    
    
66. [9910359] Clustering of high-redshift galaxies: relating LBGs to dark matter halos (Oct 20, 1999)
    Risa H. Wechsler, James S. Bullock, Rachel S. Somerville, Tsafrir Kolatt, Joel R. Primack, George R. Blumenthal, Avishai Dekel
    
    
67. [9812368] Cosmological Implications of Lyman-Break Galaxy Clustering (Dec 20, 1998)
    Risa H. Wechsler, Michael A. K. Gross, Joel R. Primack, George R. Blumenthal, Avishai Dekel, Rachel S. Somerville
    
    
68. [9712141] Implications of Spikes in the Redshift Distribution of $z\sim3$ Galaxies (Dec 10, 1997)
    Risa H. Wechsler, Michael A. K. Gross, Joel R. Primack, George R. Blumenthal, Avishai Dekel