The JCMT Gould Belt Survey: Understanding the influence of outflows on Gould Belt clouds
| Autor: | J. Di Francesco, John Richer, Jane V. Buckle, Jennifer Hatchell, Emily Drabek-Maunder |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
010308 nuclear & particles physics Turbulence Astrophysics::High Energy Astrophysical Phenomena Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Kinetic energy 01 natural sciences Supernova Space and Planetary Science 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Outflow 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics James Clerk Maxwell Telescope |
| Zdroj: | Monthly Notices of the Royal Astronomical Society: Letters. 457:L84-L88 |
| ISSN: | 1745-3933 1745-3925 |
| Popis: | Using James Clerk Maxwell Telescope (JCMT) Gould Belt Survey data from CO J = 3 → 2 isotopologues, we present a meta-analysis of the outflows and energetics of star-forming regions in several Gould Belt clouds. The majority of the regions are strongly gravitationally bound. There is evidence that molecular outflows transport large quantities of momentum and energy. Outflow energies are at least 20 per cent of the total turbulent kinetic energies in all of the regions studied and greater than the turbulent energy in half of the regions. However, we find no evidence that outflows increase levels of turbulence, and there is no correlation between the outflow and turbulent energies. Even though outflows in some regions contribute significantly to maintaining turbulence levels against dissipation, this relies on outflows efficiently coupling to bulk motions. Other mechanisms (e.g. supernovae) must be the main drivers of turbulence in most if not all of these regions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|