Pith Number

pith:IYLKOBUX

pith:2026:IYLKOBUXNK3YWX2RTY3VAWM6XM

not attested not anchored not stored refs resolved

Radio sirens: inferring $H_0$ with binary black holes and neutral hydrogen in the era of the Einstein Telescope and the SKA Observatory

Carmelita Carbone, Dounia Nanadoumgar-Lacroze, Ian Harrison, Jan Harms, Konstantin Leyde, Marta Spinelli, Matteo Calabrese, Matteo Schulz, Riccardo Murgia, Simone Mastrogiovanni, Steven Cunnington, Tessa Baker, Tommaso Ronconi, Ulyana Dupletsa

Combining black hole merger distances with neutral hydrogen maps constrains the Hubble constant to 8 percent precision.

arxiv:2605.12606 v1 · 2026-05-12 · astro-ph.CO · astro-ph.HE

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Claims

C1strongest claim

This combined methodology allows us to constrain the Hubble constant to ∼8% precision, using around 3,000 GW events with signal-to-noise ratios greater than 150. This corresponds to an improvement of around 90% compared to not considering the information from the neutral hydrogen maps.

C2weakest assumption

That the simulated neutral hydrogen intensity maps can serve as accurate and unbiased redshift priors for the gravitational wave events, and that the expected number of detectable events with the Einstein Telescope is achievable without significant unmodeled systematics.

C3one line summary

Using simulated binary black hole mergers and neutral hydrogen maps, the radio sirens method constrains H0 to 8% precision with 3000 high-SNR events, offering a 90% improvement over standard dark siren analyses.

References

200 extracted · 200 resolved · 70 Pith anchors

[1] Binary black holes population and cosmology in new lights: signature of PISN mass and formation channel in GWTC-3 2023 · doi:10.1093/mnras/stad1373

[2] The Science of the Einstein Telescope 2026 · doi:10.1088/1475-7516/2026/03/081

[3] The redshift dependence of black hole mass distribution: is it reliable for standard sirens cosmology? 2022 · doi:10.1093/mnras/stac2152

[4] Mapping the cosmic expansion history from LIGO-Virgo-KAGRA in synergy with DESI and SPHEREx 2022 · doi:10.1093/mnras/stac208

[5] Mukherjee, Suvodip and Krolewski, Alex and Wandelt, Benjamin D. and Silk, Joseph. Cross-correlating dark sirens and galaxies: constraints on H_0 from GWTC-3 of LIGO-Virgo-KAGRA. Astrophys. J. 2024. do 2024 · doi:10.3847/1538-4357/ad7d90

Receipt and verification

First computed	2026-05-18T03:10:00.786083Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4616a706976ab78b5f519e3750599ebb0158a2a937a4f43dff7c6e76fa61cb13

Aliases

arxiv: 2605.12606 · arxiv_version: 2605.12606v1 · doi: 10.48550/arxiv.2605.12606 · pith_short_12: IYLKOBUXNK3Y · pith_short_16: IYLKOBUXNK3YWX2R · pith_short_8: IYLKOBUX

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/IYLKOBUXNK3YWX2RTY3VAWM6XM \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 4616a706976ab78b5f519e3750599ebb0158a2a937a4f43dff7c6e76fa61cb13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e639b98101045d2fda6d28ef66cdfc9af74ad6aea28e368da66ea4c03c867d6a",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-05-12T18:00:16Z",
    "title_canon_sha256": "8886553efe5ed5790acb14a1da00d4a02bbc8e5f051d401826691d0b538927b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.12606",
    "kind": "arxiv",
    "version": 1
  }
}