{
  "abstract": "Constraining the dark matter halos of the smallest galaxies offers fundamental insights into the nature of dark matter and stellar feedback. Using the Dark Energy Spectroscopic Instrument (DESI) Data Release 1, we infer the stellar-to-halo mass relation (SHMR) down to the dwarf scale ($M_\\star < 10^9\\,M_\\odot$), without extrapolation from the higher mass range. Leveraging the unprecedented depth of the DESI Bright Galaxy Survey at $0.01 < z < 0.2$, we construct 12 samples spanning nearly four orders of magnitude in stellar mass, and measure their projected clustering $w_p$, galaxy-galaxy lensing $ΔΣ$, as well as a novel observable: satellite occupation number $N_{\\rm sat}$. The addition of $N_{\\rm sat}$ enables robust subtraction of satellite contributions to both $w_p$ and $ΔΣ$ across the 12 individual halo occupation distribution analyses, yielding an average halo-to-stellar mass relation (HSMR) of $\\log \\langle M_h(M_\\star) \\rangle = 12.06 + 0.58\\log(M_\\star/10^{11}) + (M_\\star/10^{11})^{0.73}$. Combining this HSMR with an observed stellar mass function, we constrain the SHMR across five orders of magnitude in halo mass, with the power-law slope steepening from $0.32 \\pm 0.06$ above the Milky Way mass to $2.08 \\pm 0.21$ in the dwarf regime. Interestingly, the scatter about the SHMR grows from $0.17 \\pm 0.02$ dex at Milky Way-like scales to $0.68_{-0.33}^{+0.21}$ dex for systems comparable to the Large Magellanic Cloud, suggesting that smaller galaxies follow increasingly diverse evolutionary paths. Our work highlights the power of DESI in probing the galaxy-halo connection within the dwarf regime, offering an exciting avenue to bridge the gap between large-scale and near-field cosmologies in the future.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.04351",
  "author_total": 54,
  "authors": [
    {
      "name": "Zhiwei Shao"
    },
    {
      "name": "Ying Zu"
    },
    {
      "name": "Andrés N Salcedo"
    },
    {
      "name": "Yuanye Lin"
    },
    {
      "name": "Zhao Chen"
    },
    {
      "name": "Xiaoju Xu"
    },
    {
      "name": "Junyu Hua"
    },
    {
      "name": "Zhongxu Zhai"
    },
    {
      "name": "Jessica Nicole Aguilar"
    },
    {
      "name": "Steven Ahlen"
    },
    {
      "name": "Florian Beutler"
    },
    {
      "name": "Davide Bianchi"
    },
    {
      "name": "David Brooks"
    },
    {
      "name": "Aurelio Carnero Rosell"
    },
    {
      "name": "Francisco Javier Castander"
    },
    {
      "name": "Todd Claybaugh"
    },
    {
      "name": "Axel de la Macorra"
    },
    {
      "name": "Biprateep Dey"
    },
    {
      "name": "Zhejie Ding"
    },
    {
      "name": "Jaime E Forero-Romero"
    },
    {
      "name": "Enrique Gaztañaga"
    },
    {
      "name": "Satya Gontcho A. Gontcho"
    },
    {
      "name": "Gaston Gutierrez"
    },
    {
      "name": "Changhoon Hahn"
    },
    {
      "name": "Stephanie Juneau"
    },
    {
      "name": "Robert Kehoe"
    },
    {
      "name": "Anthony Kremin"
    },
    {
      "name": "Ofer Lahav"
    },
    {
      "name": "Andrew Lambert"
    },
    {
      "name": "Martin Landriau"
    },
    {
      "name": "Laurent Le Guillou"
    },
    {
      "name": "Marc Manera"
    },
    {
      "name": "Paul Martini"
    },
    {
      "name": "Aaron Meisner"
    },
    {
      "name": "Ramon Miquel"
    },
    {
      "name": "John Moustakas"
    },
    {
      "name": "Seshadri Nadathur"
    },
    {
      "name": "Enrique Paillas"
    },
    {
      "name": "Will Percival"
    },
    {
      "name": "Francisco Prada"
    },
    {
      "name": "Ignasi Pérez-Ràfols"
    },
    {
      "name": "Corentin Ravoux"
    },
    {
      "name": "Graziano Rossi"
    },
    {
      "name": "Rossana Ruggeri"
    },
    {
      "name": "Manasvee Saraf"
    },
    {
      "name": "Lado Samushia"
    },
    {
      "name": "Eusebio Sanchez"
    },
    {
      "name": "Christoph Saulder"
    },
    {
      "name": "David Schlegel"
    },
    {
      "name": "Joseph Harry Silber"
    },
    {
      "name": "Małgorzata Siudek"
    },
    {
      "name": "Gregory Tarlé"
    },
    {
      "name": "Benjamin Alan Weaver"
    },
    {
      "name": "Hu Zou"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8gcg4yk3vpe4t.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.04351",
  "fulltext_url": null,
  "id": "8gcg4yk3vpe4t",
  "issns": [],
  "landing_url": "https://hal.science/hal-05758204v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7211894009",
  "pdf_url": "https://arxiv.org/pdf/2609.04351",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8gcg4yk3vpe4t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:37Z",
      "native_id": "hal-05758204",
      "source": "hal",
      "url": "https://hal.science/hal-05758204v1"
    },
    {
      "first_seen": "2026-10-30T12:19:14Z",
      "native_id": "2609.04351",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.04351"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Extending the Stellar-to-Halo Mass Relation to Dwarf Galaxies with DESI DR1",
  "title_text": "Extending the Stellar-to-Halo Mass Relation to Dwarf Galaxies with DESI DR1",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:14Z",
  "url": "https://research.draconitic.com/paper/8gcg4yk3vpe4t",
  "venue": "HAL",
  "versions": []
}