Sequentially triggered star formation in OB associations
نویسندگان
چکیده
منابع مشابه
I. Star Formation in T and Ob Associations
o The OB ass ciati ns, which are f ssil star f rmati n regi ns, retain the endpr ducts f the star f rmati n pr cess in an pen, un bscured envir nment. Observati ns f the l w-mass stars in OB ass ciati ns pr vide a far clearer picture f the results f the star f rmati n pr cess than d bservati ns f embedded regi ns f ng ing star f rmati n. We review the X-ray and ptical surveys f the f ssil star ...
متن کاملKinematic Evidence for Propagating Star Formation Induced by Ob Associations
We report the detection of expanding patterns, revealed by Hipparcos proper motions, in some OB associations. The expansion velocities exceed typical internal motions in associations, and suggest that very energetic processes may have been responsible for both the formation of the stars and their initial velocities. Observations of related interstellar gas support this explanation. One of the r...
متن کاملStar formation in unbound giant molecular clouds: the origin of OB associations?
We investigate the formation of star clusters in an unbound GMC, where the supporting kinetic energy is twice as large as the cloud’s self-gravity. This cloud manages to form a series of star clusters and disperse, all within roughly 2 crossing times (10 Myr), supporting recent claims that star formation is a rapid process. Simple assumptions about the nature of the star formation occurring in ...
متن کاملMultiplicity among T Tauri stars in OB and T associations Implications for binary star formation
We present first results of a survey for companions among X-ray selected pre-main sequence stars, most of them being weak-line T Tauri stars (WTTS). These T Tauri stars have been identified in the course of optical follow-up observations of sources from the ROSAT All Sky Survey associated with star forming regions. The areas surveyed include the T associations of Chamaeleon and Lupus as well as...
متن کاملAn Hst Study of Ob Associations and Star Clusters In
The massive stellar content, the OB associations and the star clusters in an HST field in M101 = NGC 5457 are investigated. A clustering algorithm yields 79 putative associations. Their size distribution is similar to that found in the Magellanic Clouds, M31 and M33, with an average size around 90 pc. The V luminosity function for the stars contained within the associations has a slope d logN/d...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2006
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921307001597