pith:5GGEKKBP
Clusters Hiding Under Millimeter Sources (CHUMS) I: Extreme CHUMS
Subtracting central AGN emission from millimeter maps reveals previously hidden galaxy clusters.
arxiv:2605.15444 v1 · 2026-05-14 · astro-ph.CO · astro-ph.GA
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Claims
We present signal to noise ratio (SNR) estimates for the clusters after subtracting the AGN signal from 90 GHz ACT maps using the CARMA measurements, demonstrating high SNR cluster detections once this contaminating emission is removed.
The AGN flux measured by CARMA at one epoch can be directly subtracted from ACT maps taken at different times, with the low observed variability justifying the assumption that the AGN emission level is stable enough for accurate subtraction.
AGN emission from central galaxies hides galaxy clusters in SZ surveys; CARMA-based subtraction recovers high-SNR detections in ACT maps for three specific clusters.
References
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| First computed | 2026-05-20T00:00:58.932258Z |
|---|---|
| Builder | pith-number-builder-2026-05-17-v1 |
| Signature | Pith Ed25519
(pith-v1-2026-05) · public key |
| Schema | pith-number/v1.0 |
Canonical hash
e98c45282fe4725df2db53cb4ec9756879746e9114689c72793e4ebdb8697bde
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curl -sH 'Accept: application/ld+json' https://pith.science/pith/5GGEKKBP4RZF34W3KPFU5SLVNB \
| 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())"
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Canonical record JSON
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