October 15h -Thursday- 12:10

"Dissecting a rare galaxy merger (the Hummingbird) with radio and mm-observations"

Cristina Romero Cañizales

(Pontificia Univ. Católica de Santiago de Chile)

The Bird is a luminous infrared galaxy product of a triple merger. Previous infrared observations have shown that the ongoing star formation in the least massive of the components (the head) outshines that of the primary nuclei (the heart and the body). This clashes with the commonly accepted major merger scenario in which the SF is expected to be higher in central compact regions. Here I will present preliminary results from our Atacama Large Millimeter Array (ALMA) 12CO 1-0 and Very Large Array (VLA) observations toward this spectacular object, which have allowed us to find the actual sites where the fuel for star formation is concentrated and a possible explanation for the quenching of the activity in the major components.

Facultad de Ciencias

Seminario departamento de Física Teórica

Universidad de Zaragoza