Poster abstract
Binary formation mechanisms. Constraints from the Companion Mass Ratio
Abstract
We present a statistical comparison of the mass ratio distribution of
companions, as observed in different multiplicity surveys, to a recent
estimate of the single object mass function (Chabrier2005). The main goal
of our analysis is to test whether or not the observed companion mass ratio
distribution (CMRD) as a function of primary star mass and star formation
environment is consistent with having been drawn from the field star IMF.
We consider samples of companions for M dwarfs, G and OB stars, found in
the field, open clusters, and star-forming regions, and we compare them
with populations of binaries generated through Monte Carlo simulations by
random pairing from the assumed IMF for a fixed primary mass.
The analysis of connections between the CMRD and the IMF over a broad
range of primary masses and variety of environments can help in
discriminating different binary formation mechanisms and investigating
about the origin of the field.
companions, as observed in different multiplicity surveys, to a recent
estimate of the single object mass function (Chabrier2005). The main goal
of our analysis is to test whether or not the observed companion mass ratio
distribution (CMRD) as a function of primary star mass and star formation
environment is consistent with having been drawn from the field star IMF.
We consider samples of companions for M dwarfs, G and OB stars, found in
the field, open clusters, and star-forming regions, and we compare them
with populations of binaries generated through Monte Carlo simulations by
random pairing from the assumed IMF for a fixed primary mass.
The analysis of connections between the CMRD and the IMF over a broad
range of primary masses and variety of environments can help in
discriminating different binary formation mechanisms and investigating
about the origin of the field.