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25 April 2024 |
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The low mass stellar population of the Orion OB1 association and implications for the formation of low mass stars | | F. M. Walter
; J. M. Alcala
; R. Neuhaeuser
; M. Sterzik
; S.J. Wolk
; | | Date: |
23 Mar 1999 | | Subject: | astro-ph | | Abstract: | The OB associations, which are fossil star formation regions, retain the end-products of the star formation process in an open, unobscured environment. Observations of the low mass stars in OB associations provide a far clearer picture of the results of the star formation process than do observations of embedded, on-going star formation regions. We review the X-ray and optical surveys of the fossil star formation regions in the Orion OB1 association. Low mass pre-main sequence stars abound not only in the known regions of recent star formation, but are also distributed over a much larger volume. The pre-main sequence stars have a narrow age spread, and the mass function extends down to substellar masses. The clustering of pre-main sequence stars around sigma Ori may represent an evolved version of the Orion Nebula Cluster. We speculate about the effect of the OB environment on the initial mass function and the formation of planetary systems like the Solar System. | | Source: | arXiv, astro-ph/9903351 | | Services: | Forum | Review | PDF | Favorites | |
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