Molecular hydrogen emission from discs in the Chamaeleontis cluster
| Autor: | Suzanne Ramsay Howat, Jane Greaves |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Gas giant Astrophysics (astro-ph) Hydrogen molecule FOS: Physical sciences myr Minimum mass Astronomy and Astrophysics Astrophysics Space and Planetary Science Cluster (physics) Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Formation and evolution of the Solar System Astrophysics::Galaxy Astrophysics Line (formation) |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 379:1658-1664 |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | Disks in the 6 Myr old cluster eta Chamaeleontis were searched for emission from hot H2. Around the M3 star ECHAJ0843.3-7905 we detect circumstellar gas orbiting at ~2 AU. If the gas is UV-excited, the ro-vibrational line traces a hot gas layer supported by a disk of mass ~0.03Msolar, similar to the minimum mass solar nebula. Such a gas reservoir at 6 Myr would promote the formation and inwards migration of gas giant planets. Accepted for publication in MNRAS. 9 pages |
| Databáze: | OpenAIRE |
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