20 FEBRUARY 2004 | Tor D. Wager, James K. Rilling, Edward E. Smith, Alex Sokolik, Kenneth L. Casey, Richard J. Davidson, Stephen M. Kosslyn, Robert M. Rose, Jonathan D. Cohen
This study investigates the role of fragmentation in the formation of massive stars. Using high-resolution interferometric observations, the researchers analyzed the dust continuum emission from a young massive star-forming region, IRAS 19410+2336. The findings suggest that the initial mass distribution of the protocluster is consistent with the stellar initial mass function, indicating that fragmentation of massive cores may determine the initial mass function and the masses of the final stars. This implies that stars of all masses can form through accretion processes, and that the coalescence of intermediate-mass protostars may not be necessary.
The study also highlights the importance of high-resolution observations in understanding the earliest stages of massive star formation. The researchers observed that the dust emission is directly proportional to the column density of dense gas, allowing them to study the gas and dust distributions, the possible fragmentation of larger-scale cores, and physical parameters such as masses and column densities. The results show that the region contains two massive gas cores aligned in a north-south direction, which split into substructures at scales between 3'' and 5''. At higher spatial resolutions, the cores resolve into even more subsources, with small clusters of gas and dust condensations containing at least 12 sources per large-scale core. These findings support the hypothesis that fragmentation plays a crucial role in the formation of massive stars.This study investigates the role of fragmentation in the formation of massive stars. Using high-resolution interferometric observations, the researchers analyzed the dust continuum emission from a young massive star-forming region, IRAS 19410+2336. The findings suggest that the initial mass distribution of the protocluster is consistent with the stellar initial mass function, indicating that fragmentation of massive cores may determine the initial mass function and the masses of the final stars. This implies that stars of all masses can form through accretion processes, and that the coalescence of intermediate-mass protostars may not be necessary.
The study also highlights the importance of high-resolution observations in understanding the earliest stages of massive star formation. The researchers observed that the dust emission is directly proportional to the column density of dense gas, allowing them to study the gas and dust distributions, the possible fragmentation of larger-scale cores, and physical parameters such as masses and column densities. The results show that the region contains two massive gas cores aligned in a north-south direction, which split into substructures at scales between 3'' and 5''. At higher spatial resolutions, the cores resolve into even more subsources, with small clusters of gas and dust condensations containing at least 12 sources per large-scale core. These findings support the hypothesis that fragmentation plays a crucial role in the formation of massive stars.