Methanol search in the water-rich planet-forming disk around HL Tauri

Star system: HL Tauri | Distance from the Sun: 185 light years

HL Tauri is a young star surrounded by a disk of gas and dust where planets are forming. Scientists are interested in finding complex molecules like methanol in such disks because these molecules are important for the chemistry that could lead to life. Methanol is often found around other young stars, but its presence in planet-forming disks is rare.

In this study, researchers looked for methanol in the disk around HL Tauri, motivated by the detection of warm water vapor in the same region. They used detailed observations from the ALMA telescope to search for signs of methanol gas. Despite their efforts, they did not detect any methanol emission in the data. They calculated strict upper limits for how much methanol could be present, based on the sensitivity of their observations.

The results show that the amount of methanol in HL Tauri's disk is much lower than in other young stars or comets in our Solar System. The most likely reason for this is that thick dust in the center of the disk blocks the methanol emission from being seen. This suggests that the chemical environment in HL Tauri's disk may be different from other places where methanol is more easily detected.

Key findings
- Methanol, a key organic molecule, was not detected in the planet-forming disk around HL Tauri.
- The upper limit for methanol is much lower than in other young stars and Solar System comets.
- Thick dust in the disk likely hides methanol, affecting its detectability.

Scientific study

Hunting for methanol in the water rich, planet forming disk around HL Tauri (external link)