Michael Margulis

TL;DR: In this paper, the results of numerical N-body calculations which simulate the dynamical evolution of young clusters as they emerge from molecular clouds have been presented, and the combination of these parameters which result in the production of bound stellar groups after the gas not used in star formation is completely dispersed.

TL;DR: In this article, observations of J = 1-0 emission from CO in nine suspected molecular outflows in the Monoceros OB1 molecular cloud are presented, and it is found that if the five sources which are confirmed to be outflows conserve momentum as they evolve, they will sweep up at least 6 percent of the mass of the entire cloud before coming into pressure equilibrium with the ambient gas.

Abstract: IRAS 100 micron intensity images and 60 micron optical depth maps of five molecular cloud complexes are analyzed using area-perimeter analysis. It is found that a noninteger Hausdorff dimension describes the shape of clouds and condensations within the complexes; that is, cloud areas are generally a noninteger power of perimeter, so that the projected two-dimensional shapes of these objects are fractal. The effect of noise on the cloud images is analyzed, and it is demonstrated that this result is not an artifact but reflects a fundamental irregularity of the clouds which probably arises from turbulence. The Hausdorff dimensions do not differ substantially from those found for terrestrial and interstellar cirrus clouds. No evidence of smooth morphology is found, implying that the correlation length of the turbulence driving the morphological irregularities within the clouds is less than 0.3 pc. Strong evidence of a measurable decline in Hausdorff dimension with decreasing scale is also found. 31 refs.

TL;DR: In this article, a survey for CO J = 1 -0 emission from S0 and S0/a galaxies is presented, and the results show that molecular gas is abundant within some early-type disk galaxies, and that the range in the ratio of molecular gas to atomic gas mass is similar to those in other disk galaxies.

TL;DR: The results of an IRAS survey of a large portion of the Monoceros OB1 molecular cloud for discrete far-IR sources are presented in this paper, indicating that star formation is still occurring in the complex which produced the visible cluster, NGC 2264.