Galaxy Formation and Cosmology Group

GFC-led papers

• [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
  
  
• [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
  
  
• [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
  
  
• [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
  
  
• [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
  
  
• [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
  
  

A full GFC-led paper list can be found here.

GFC collaborative papers

• [2601.12976] Joint analysis of small-scale galaxy clustering and galaxy--galaxy lensing from BOSS galaxies (Jan 19, 2026)
  Wenhao Gao, Zhenjie Liu, Zhongxu Zhai, Jeremy L. Tinker, Jun Zhang, Arka Banerjee, Joseph DeRose, Hong Guo, Yao-Yuan Mao, Kate Storey-Fisher, Risa H. Wechsler
  
  
• [2512.15962] Cosmological Constraints from Full-Scale Clustering and Galaxy-Galaxy Lensing with DESI DR1 (Dec 17, 2025)
  Johannes U. Lange, Alexandra Wells, Andrew Hearin, Gillian Beltz-Mohrmann, Alexie Leauthaud, Sven Heydenreich, Chris Blake, Jessica Nicole Aguilar, Steven Ahlen, Abhijeet Anand, Davide Bianchi, David Brooks, Francisco Javier Castander, Todd Claybaugh, Shaun Cole, Andrei Cuceu, Kyle Dawson, Axel de la Macorra, Biprateep Dey, Peter Doel, Ann Elliott, Ni Putu Audita Placida Emas, Simone Ferraro, Andreu Font-Ribera, Jaime E. Forero-Romero, Cristhian Garcia-Quintero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Julien Guy, Klaus Honscheid, Dragan Huterer, Mustapha Ishak, Shahab Joudaki, Dick Joyce, Robert Kehoe, David Kirkby, Theodore Kisner, Anthony Kremin, Alex Krolewski, Ofer Lahav, Claire Lamman, Martin Landriau, Laurent Le Guillou, Michael Levi, Marc Manera, Paul Martini, Aaron Meisner, Ramon Miquel, John Moustakas, Eva-Maria Mueller, Seshadri Nadathur, Jeffrey A. Newman, Gustavo Niz, Nathalie Palanque-Delabrouille, Will Percival, Claire Poppett, Anna Porredon, Francisco Prada, Ignasi Pérez-Ràfols, Amy Robertson, Graziano Rossi, Rossana Ruggeri, Eusebio Sanchez, Christoph Saulder, David Schlegel, Michael Schubnell, Agne Semenaite, Hee-Jong Seo, Joseph Harry Silber, David Sprayberry, Zechang Sun, Gregory Tarlé, Mariana Vargas Magana, Benjamin Alan Weaver, Risa Wechsler, Pauline Zarrouk, Rongpu Zhou, Hu Zou
  
  
• [2511.02009] Quasars acting as Strong Lenses Found in DESI DR1 (Nov 3, 2025)
  Everett McArthur, Martin Millon, Meredith Powell, Risa H. Wechsler, Zhiwei Pan, Małgorzata Siudek, Jonas Spiller, Jessica Nicole Aguilar, Steven Ahlen, Abhijeet Anand, Segev BenZvi, Davide Bianchi, David Brooks, Todd Claybaugh, Andrei Cuceu, Axel de la Macorra, Arjun Dey, Peter Doel, Andreu Font-Ribera, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Hiram K. Herrera-Alcantar, Klaus Honscheid, Mustapha Ishak, Dick Joyce, Stephanie Juneau, David Kirkby, Theodore Kisner, Anthony Kremin, Ofer Lahav, Claire Lamman, Martin Landriau, Laurent Le Guillou, Marc Manera, Aaron Meisner, Ramon Miquel, Seshadri Nadathur, Nathalie Palanque-Delabrouille, Will Percival, Claire Poppett, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, David Schlegel, Michael Schubnell, Hee-Jong Seo, Joseph Harry Silber, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Rongpu Zhou, Hu Zou
  
  
• [2509.25335] The SAGA Survey. VI. The Size-Mass Relation for Low-Mass Galaxies Across Environments (Sep 29, 2025)
  Yasmeen Asali, Marla Geha, Erin Kado-Fong, Yao-Yuan Mao, Risa H. Wechsler, Mithi A. C. de los Reyes, Imad Pasha, Nitya Kallivayalil, Ethan O. Nadler, Erik J. Tollerud, Yunchong Wang, Benjamin Weiner, John F. Wu
  
  
• [2509.20458] A DECADE of dwarfs: first detection of weak lensing around spectroscopically confirmed low-mass galaxies (Sep 24, 2025)
  Chun-Hao To, Chihway Chang, Dhayaa Anbajagane, Risa H. Wechsler, Alex Drlica-Wagner, M. Adamów, A. Alarcon, M. R. Becker, J. A. Carballo-Bello, R. Cawthon, N. Chicoine, C. Doux, J. H. Esteves, P. S. Ferguson, M. Gatti, D. Gruen, R. A. Gruendl, K. Herron, David J. James, C. E. Martínez-Vázquez, S. Mau, J. McCullough, G. E. Medina, B. Mutlu-Pakdil, A. Navarro-Alsina, N. E. D. Noël, A. B. Pace, M. Raveri, A. H. Riley, D. J. Sand, L. F. Secco, T. Shin, G. S. Stringfellow, D. Suson, C. Y. Tan, R. Teixeira, A. Zenteno, Z. Zhang
  
  
• [2509.20434] Dwarf galaxy halo masses from spectroscopic and photometric lensing in DESI and DES (Sep 24, 2025)
  Helena Treiber, Alexandra Amon, Risa H. Wechsler, Viraj Manwadkar, Justin Myles, ChangHoon Hahn, Andrew Hearin, Sven Heydenreich, Amélie Saintonge, Manasvee Saraf, Jessica Nicole Aguilar, Steven Ahlen, Abhijeet Anand, Davide Bianchi, David Brooks, Francisco Javier Castander, Todd Claybaugh, Andrew P. Cooper, Andrei Cuceu, Axel de la Macorra, Biprateep Dey, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Dragan Huterer, Dick Joyce, Stephanie Juneau, Anthony Kremin, Martin Landriau, Laurent Le Guillou, Marc Manera, Aaron Meisner, Ramon Miquel, John Moustakas, Seshadri Nadathur, Will J. Percival, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, David Schlegel, Michael Schubnell, Joseph Harry Silber, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Rongpu Zhou, Hu Zou
  
  
A full collaborative list can be found here.

Current members

Graduate Students - Jay Baptista, Tara Dacunha, Abigail Hartley, Viraj Manwadkar, Mahlet Shiferaw, Jenny Wan, Hanyue Wang
Undergraduate Students - Paul Gontard, Michelle Park, Christine Ye
Postdocs - Christian Aganze, Shreya Anand, Ani Chiti, Suchetha Cooray, Philipp Frank, Erin Kado-Fong, Kate Storey-Fisher
Research Scientists - Marcelo Alvarez, Dalya Baron, Ioana Ciucă, Philip Mansfield, Sergio Martin-Alvarez
PI - Risa Wechsler

Previous members

Graduate Students - Peter Behroozi, Elise Darragh-Ford, Joseph DeRose, Harry Desmond, Nickolas Kokron, Tony Li, Yao-Yuan Mao, Sean McLaughlin, Ethan Nadler, Rachel Reddick, Chun-Hao To, Sebastian Wagner-Carena, Richie Wang, Hao-Yi (Heidi) Wu
Undergraduate Students - Deveshi Buch, Zhanpei Fang, Juliana Karp, Benjamin Lehmann, Lulu Liu, Madison Ueland, Marc Williamson
Postdocs - Alexandra Amon, Matthew Becker, Simon Birrer, Michael Busha, Chia-Hsun (Albert) Chuang, Carlos Cunha, Alis Deason, Brian Gerke, Gregory Green, Elisabeth Krause, Johannes Lange, Yu Lu, Mia de los Reyes, Louis Strigari, Wren Suess, Sandy Yuan