# Observational constraints on the survival of pristine stars

## TL;DR

This paper provides analytical constraints on the existence of surviving pristine stars from the early Universe, suggesting that current predictions of their presence are likely overestimated or incorrect.

## Contribution

It introduces a simple analytical method to tighten constraints on the number of surviving pristine stars, challenging previous predictions.

## Key findings

- Most current models predicting surviving pristine stars are inconsistent with observational constraints.
- The method rules out the existence of a significant number of such stars in the local neighborhood.
- Survivor counts larger than zero are effectively ruled out by the new constraints.

## Abstract

There is a longstanding discussion about whether low mass stars can form from pristine gas in the early Universe. A particular point of interest is whether we can find surviving pristine stars from the first generation in our local neighbourhood. We present here a simple analytical estimate that puts tighter constraints on the existence of such stars. In the conventional picture, should these stars have formed in significant numbers and have preserved their pristine chemical composition until today, we should have found them already. With the presented method most current predictions for survivor counts larger than zero can be ruled out.