KMOS3D: DYNAMICAL CONSTRAINTS ON THE MASS BUDGET IN EARLY STAR-FORMING DISKS

Dynamical Constraints on Massive Star Formation

Extragalactic HII regions and their ionizing star clusters are the most prominent signposts of recent starbirth activity in galaxies. In this paper, we present optical measurements of nearby extragalactic HII regions with the aim of investigating possible relationships between the newborn ionizing clusters and their dynamical environment. Evidence for variations in the measured HII region prope...

Dynamical constraints on the quadrupole mass moment of the HD 209458 star

The aim of this paper is to dynamically constrain the quadrupole mass moment J2 of the main-sequence HD 209458 star. The adopted method is the confrontation between the measured orbital period of its transiting planet Osiris and a model of it. Osiris is assumed to move along an equatorial and circular orbit. Our estimate, for given values of the stellar massM and radiusR and by assuming the val...

Dynamical evolution of star forming regions

We model the dynamical evolution of star forming regions with a wide range of initial properties. We follow the evolution of the regions’ substructure using theQ–parameter, we search for dynamical mass segregation using the ΛMSR technique, and we also quantify the evolution of local density around stars as a function of mass using the ΣLDR method. The amount of dynamical mass segregation measur...

Global Spiral Modes in Star-Forming Gravitating Disks

Using 2D nonlinear simulations, we study the generation and nonlinear evolution of spiral structure in a star-forming multi-component gravitating disk. We confirm in agreement with previous studies the destabilizing role of a cold gaseous component and extend this conclusion for multi-component star-forming disks exchanging mass and momentum between its components. We show that the spiral struc...

Observational constraints on the neutron star mass distribution.