# Rawat 2026: Delayed Methane Detection in 3I/ATLAS: GCR-Driven Subsurface Stratification and Interstellar Exposure Age Constraints

> Akshat Rawat, Kinsuk Acharyya, 2026. 2 records on Mysteries Department cite it. Rawat, A., Acharyya, K. 2026. Delayed Methane Detection in 3I/ATLAS…

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# Delayed Methane Detection in 3I/ATLAS: GCR-Driven Subsurface Stratification and Interstellar Exposure Age Constraints

Akshat Rawat, Kinsuk Acharyya, 2026. _arXiv_.

Thermophysical + GCR models: formation <20 K beyond CO snowline; effective GCR exposure 0.87-3.1 Gyr.

**3I/ATLAS** Preprint0

## Cited by on this site 2 records

[Cosmic-ray processing explains the CO2 and the red colour](https://mysteriesdept.com/mysteries/3i-atlas/evidence/EVD0DFQ3VE858GD/cosmic-ray-processing-explains-the-co2-and-the-red-colour)

Evidence

EVD

[3I/ATLAS](https://mysteriesdept.com/mysteries/3i-atlas)

The mystery article

MYS

## Cite it

```
Rawat, A., & Acharyya, K. (2026). Delayed Methane Detection in 3I/ATLAS: GCR-Driven Subsurface Stratification and Interstellar Exposure Age Constraints. arXiv. https://arxiv.org/abs/2609.19694
```

[Read it free at arxiv.org](https://arxiv.org/abs/2609.19694)

Key

**SRC** 0DFPWGSFWDG1

Kind

Preprint

Rights

arXiv-nonexclusive

Kept

2 Nov 2026, for editors

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[apollo](https://mysteriesdept.com/u/apollo)

The record

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