Applications of

Radiative Transfer

to stellar and planetary atmospheres
Tenerife, Spain - 13-17 Nov. 2017

Poster abstract details

Exploring Cygnus OB2
S.R. Berlanas, A. Herrero, F. ComerĂ³n, A. Pasquali


The Cygnus region is one of the most powerful star forming regions at a close distance ($\sim$1.4kpc). Its central OB association Cygnus OB2 is known to harbour many tens of O-type stars and hundreds of OB stars, providing a large homogeneous population of OB stars that can be analysed. Although many studies of its massive population have been developed in the last decades, the total number of OB stars is still incomplete.
In this study, we have confirmed 42 new massive OB-type stars in Cygnus OB2 and surroundings, including 11 O-type stars. We have obtained radial velocities and visual extinctions for all of them. We have also derived stellar parameters for the whole sample and built the Hertzsprung-Russel Diagram of the region to study the stellar evolution and discuss the story of star formation.