Pith Number

pith:MNBYXS7Z

pith:2026:MNBYXS7ZTNV5FM72OLRMFOLMX6

not attested not anchored not stored refs resolved

A new sample of Little Red Dots at $z<0.45$ in DESI DR1: Broad Balmer lines, low ionization spectrum and no variability

Alberto Torralba, Anna de Graaff, Jorryt Matthee, Kevin Park, Rohan P. Naidu, Sara Mascia, Zolt\'an Haiman

Eight Little Red Dots at z=0.2-0.45 show broad Balmer lines and low-ionization spectra but at a number density 10,000 times lower than at high redshift.

arxiv:2605.14233 v1 · 2026-05-14 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MNBYXS7ZTNV5FM72OLRMFOLMX6}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We report the discovery of eight LRDs at z=0.2-0.45... number density of 1.6×10^{-9} Mpc^{-3}, indicating a number density ~10,000 times lower than in the first billion years of cosmic time.

C2weakest assumption

That the emission-line selection criteria (broad Balmer lines, steep decrements, absent high-ionization lines) cleanly isolate true LRD analogs without significant contamination from other AGN or star-forming galaxies at these redshifts.

C3one line summary

Eight low-redshift Little Red Dots identified in DESI DR1 exhibit broad Balmer lines, steep decrements, compact shapes, and negligible variability, with a number density roughly 10,000 times lower than at z>4.

References

95 extracted · 95 resolved · 7 Pith anchors

[1] 2022, ApJS, 259, 35 2022

[2] T., Bogdán, Á., Kovács, O 2024

[3] arXiv e-prints , keywords = 2025

[4] Barro, G., Perez-Gonzalez, P. G., Kocevski, D. D., et al. 2024, arXiv e-prints, arXiv:2412.01887 2024

[5] Benjamin, R. A., Skillman, E. D., & Smits, D. P. 2002, ApJ, 569, 288 2002

Formal links

2 machine-checked theorem links

Cited by

4 papers in Pith

Little Red Dots as Intermediate Mass, Super-Eddington Engines: Insights from Type IIn Supernovae and The 1837-1856 Great Eruption of $\eta$ Carinae

No evolution in the number density of little red dots from cosmic dawn to cosmic noon

Transient Signatures of Star-Envelope Collisions in Little Red Dots

(LRDs)$^2$: The Low-ReDshift Little Red Dots Survey. II. DESI DR1 Sample

Receipt and verification

First computed	2026-05-17T23:39:10.721496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63438bcbf99b6bd2b3fa72e2c2b96cbf9b8365e3235533618e5efbe0c739d9aa

Aliases

arxiv: 2605.14233 · arxiv_version: 2605.14233v1 · doi: 10.48550/arxiv.2605.14233 · pith_short_12: MNBYXS7ZTNV5 · pith_short_16: MNBYXS7ZTNV5FM72 · pith_short_8: MNBYXS7Z

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/MNBYXS7ZTNV5FM72OLRMFOLMX6 \
  | 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: 63438bcbf99b6bd2b3fa72e2c2b96cbf9b8365e3235533618e5efbe0c739d9aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53856b9e4f4cd7fee54cabaff7e0d89ced4b2e41f53d86c5b93cb3d52d1e89bd",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-05-14T00:59:21Z",
    "title_canon_sha256": "30e8b2c5ad3831a3ba303006729bb112a3ff77380f512d0aca539ef15ba6ff59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14233",
    "kind": "arxiv",
    "version": 1
  }
}