pith:MNMOUZRM
JWST COMPASS Program: The 3--5$\mu$m transmission spectrum of LTT 1445 A b
The JWST 3-5 micron transmission spectrum of LTT 1445 A b shows no detectable atmospheric features, limiting metallicity to at least 350 times solar under grey cloud models.
arxiv:2605.15003 v1 · 2026-05-14 · astro-ph.EP
Add to your LaTeX paper
\usepackage{pith}
\pithnumber{MNMOUZRMPFIK5IKQY72S4O7BQK}
Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge
Record completeness
Claims
We rule out any statistically significant spectral features at this precision and place limits on atmospheric metallicity using a grid of chemical equilibrium models with grey opaque clouds. Using NIRSpec/G395H alone, we can place limits on the atmospheric metallicity of ≳350× Solar when the opaque pressure level is greater than 0.01 bars.
The assumption that grey opaque clouds and chemical equilibrium accurately represent all plausible atmospheres on this planet, such that a non-detection truly rules out lower metallicities rather than reflecting model incompleteness or unaccounted systematics in the single-visit data.
JWST NIRSpec observations of LTT 1445 A b yield a featureless 3-5μm transmission spectrum, limiting atmospheric metallicity to ≳350× solar under grey-cloud models.
References
Formal links
Receipt and verification
| First computed | 2026-05-17T23:38:54.896873Z |
|---|---|
| Builder | pith-number-builder-2026-05-17-v1 |
| Signature | Pith Ed25519
(pith-v1-2026-05) · public key |
| Schema | pith-number/v1.0 |
Canonical hash
6358ea662c7950aea150c7f52e3be182bf386c8eed8d243b8659c4622b0a9c60
Aliases
· · · · ·Agent API
Verify this Pith Number yourself
curl -sH 'Accept: application/ld+json' https://pith.science/pith/MNMOUZRMPFIK5IKQY72S4O7BQK \
| 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: 6358ea662c7950aea150c7f52e3be182bf386c8eed8d243b8659c4622b0a9c60
Canonical record JSON
{
"metadata": {
"abstract_canon_sha256": "86d65c8c4c15f8dcdbeed908ceb368b1beb7e4fb6fc335d4a86f6566c31188e6",
"cross_cats_sorted": [],
"license": "http://creativecommons.org/licenses/by/4.0/",
"primary_cat": "astro-ph.EP",
"submitted_at": "2026-05-14T16:05:17Z",
"title_canon_sha256": "91c04463d50a26cbc4000d845280464f484f92c5dac77905a8bf89bf79aabd94"
},
"schema_version": "1.0",
"source": {
"id": "2605.15003",
"kind": "arxiv",
"version": 1
}
}