Bibcode
Zaragoza-Cardiel, J.; Beckman, J.; Font, J.; Camps-Fariña, A.; García-Lorenzo, B.; Serrano-Borlaff, A.
Referencia bibliográfica
Formation, evolution, and survival of massive star clusters, Proceedings of the International Astronomical Union, IAU Symposium, Volume 316, pp. 135-136
Fecha de publicación:
3
2017
Número de citas
0
Número de citas referidas
0
Descripción
We have combined observations of the Antennae galaxies from the radio
interferometer ALMA and from the optical interferometer GHαFaS
(Galaxy Hα Fabry-Perot System). The two sets of observations have
comparable angular and spectral resolutions, enabling us to identify 142
giant molecular clouds (GMCs) and 303 Hii regions. We have measured, and
compared, their basic physical properties (radius, velocity dispersion,
luminosity). We study the mass functions of Hii regions and GMCs, where
a double population of Hii regions due to a double population of GMCs is
found. Using the velocity dispersion measurements, we claim that the
difference between the regimes is the nature of the dominant binding
force. For the regions in the lower mass range, the dominant force is
the external pressure, while in the higher mass range it is the internal
gravity of the clouds. We have applied the same method to similar
observations (GHαFaS & ALMA) of Arp 236 and NGC 1614 finding
similar results.