No high-mass protostars in the silhouette young stellar object M17-SO1

Details No high-mass protostars in the silhouette young stellar object M17-SO1 No high-mass protostars in the silhouette young stellar object M17-SO1

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005natur.434..995s&link_type=abstract

Nature, Volume 434, Issue 7036, pp. 995-998 (2005).

Physics

18

Scientific paper

The birth of very massive stars is not well understood, in contrast to the formation process of low-mass stars like our Sun. It is not even clear that massive stars can form as single entities; rather, they might form through the mergers of smaller ones born in tight groups. The recent claim of the discovery of a massive protostar in M17 (a nearby giant ionized region) forming through the same mechanism as low-mass stars has therefore generated considerable interest. Here we show that this protostar has an intermediate mass of only 2.5 to 8 solar masses (Msolar), contrary to the earlier claim of 20Msolar (ref. 8). The surrounding circumstellar envelope contains only 0.09Msolar and a much more extended local molecular cloud has 4-9Msolar.

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