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The Milky Way Stellar Halo Is Twisted and Doubly Broken: Insights from DESI DR2 Milky Way Survey Observation

  • Authors: Songting Li, Wenting Wang, Sergey E. Koposov, João A. S. Amarante, Alis J. Deason, Nathan R. Sandford, Ting S. Li, Gustavo E. Medina, Jiaxin Han, Monica Valluri, Oleg Y. Gnedin, Namitha Kizhuprakkat, Andrew P. Cooper, Leandro Beraldo e Silva, Carlos Frenk, Raymond G. Carlberg, Mika Lambert, Tian Qiu, Jessica Nicole Aguilar, Steven Ahlen, Davide Bianchi, David Brooks, Todd Claybaugh, Axel de la Macorra, Peter Doel, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Dick Joyce, Robert Kehoe, Anthony Kremin, Claire Lamman, Martin Landriau, Laurent Le Guillou, Ramon Miquel, Will Percival, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, David Schlegel, Ray Sharples, Joseph Harry Silber, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Hu Zou

Songting Li et al 2026 The Astrophysical Journal 999 .

  • Provider: AAS Journals

Caption: Figure 11.

In each panel, we compare the predicted density profiles of the variable model from Section 4.2 in the corresponding sky position (black curve) with the result of the triple power-law model (different color curves; see the legend), which directly fits this region. The dashed lines stand for the break radii of the density profile in this region. Note that although the black curves are based on the global fitting with the full data, they differ across different panels, as each panel corresponds to a particular pointing. Selection effects have been corrected in this figure. All colored model density profiles have been renormalized to give the same number of stars as real data at the given sky position after correcting selection effects. The black curve is renormalized to the whole sample.

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