Dusty Cometary Globules in W5
| Autor: | Xavier Koenig, Zoltan Balog, Kate Y. L. Su, Lori E. Allen, Scott J. Kenyon |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Physics
Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Photoevaporation Stars Spitzer Space Telescope Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Low Mass Astrophysics::Galaxy Astrophysics O-type star |
| Popis: | We report the discovery of four dusty cometary tails around low mass stars in two young clusters belonging to the W5 star forming region. Fits to the observed emission profiles from 24 micron observations with the Spitzer Space Telescope give tail lifetimes < 30 Myr, but more likely < 5 Myr. This result suggests that the cometary phase is a short lived phenomenon, occurring after photoevaporation by a nearby O star has removed gas from the outer disk of a young low mass star (see also Balog et al. 2006; Balog et al. 2008). 11 pages, 3 figures. Accepted for publication to ApJ Letters |
| Databáze: | OpenAIRE |
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