# On the Habitability of Teegarden's Star planets

## TL;DR

This study evaluates the habitability of two Earth-mass planets orbiting Teegarden's Star, suggesting they could host surface liquid water and be promising for bio-signature detection, based on analytical habitability modeling.

## Contribution

First assessment of habitability potential for Teegarden's Star planets using analytical models, highlighting their suitability for future bio-signature searches.

## Key findings

- Both planets could sustain surface liquid water across various atmospheric conditions.
- Planets are within the habitable zone and are tidally locked.
- They are among the most Earth-like exoplanets discovered to date.

## Abstract

We study the habitability of the two 1-2 Earth-mass planets, recently detected by the CARMENES collaboration, around the ultra-cool nearby M dwarf Teegarden's Star. With orbital periods of 4.9 and 11.4 days, both planets are likely to be within the Habitable Zone and tidally locked. They are among the most Earth-like exoplanets yet discovered. Applying an analytical habitability model we find that surface liquid water could be present on both planets for a wide range of atmospheric properties, which makes them attractive targets for bio-signature searches. The prospects of the planets retaining such an atmosphere over their history are discussed.