Habitable Zones and UV Habitable Zones around Host Stars

TL;DR

This paper investigates the relationship between habitable zones and ultraviolet habitable zones around stars of various masses and temperatures, highlighting how UV radiation influences potential habitability.

Contribution

It introduces a method to calculate continuous ultraviolet habitable zones and compares them with traditional habitable zones across different star types.

Findings

UV habitable zones are closer than habitable zones for stars cooler than 4600 K.

UV habitable zones are farther than habitable zones for stars hotter than 7137 K.

For hot subdwarfs, UV habitable zones are about ten times farther than habitable zones.

Abstract

Ultraviolet radiation is a double-edged sword to life. If it is too strong, the terrestrial biological systems will be damaged. And if it is too weak, the synthesis of many biochemical compounds can not go along. We try to obtain the continuous ultraviolet habitable zones, and compare the ultraviolet habitable zones with the habitable zones of host stars. Using the boundary ultraviolet radiation of ultraviolet habitable zone, we calculate the ultraviolet habitable zones of host stars with masses from 0.08 to 4.00 \mo. For the host stars with effective temperatures lower than 4,600 K, the ultraviolet habitable zones are closer than the habitable zones. For the host stars with effective temperatures higher than 7,137 K, the ultraviolet habitable zones are farther than the habitable zones. For hot subdwarf as a host star, the distance of the ultraviolet habitable zone is about ten times more than that of the habitable zone, which is not suitable for life existence.