Colloquia

Pablo García – Warm ISM in the Sgr A Complex. II. PDR Emission from the Arched-Filaments and Nearby Positions

Colloquia

“Warm ISM in the Sgr A Complex. II. PDR Emission from the Arched-Filaments and Nearby Positions”

Pablo García

University of Cologne

In the Galactic Center, several bubble-like and arc-like structures are seen. Some of these structures are closely related to massive star clusters or SNRs, such as the “Radio Arc Bubble”, located south from the Quintuplet Cluster and thought to be produced by the interaction of the molecular material with several supernovae explosions, or the Arched-Filaments, which are arc-like structures that originated presumably from the interaction of the gas with the radiation field of the massive Arches Cluster. In this ongoing project, we aim to determine the excitation source and physical conditions of the gas in the Arched-Filaments, For this purpose, we model the sub-millimeter and millimeter emission of the main cooling lines of the ISM (CO(4-3), [CI](1-0), [CI](2-1), and [CII]) detected at the filaments and nearby positions, in the context of Photon-Dominated Regions (PDRs) using the KOSMA-tau PDR model of clumpy clouds. The theoretical predictions in Abel at al., (2005) to disentangle the [CII] emission originated within H II regions, and traced by [NII] observations at 205 um,  from the one originated within PDRs is also explored.

Place:

Seminar Room Institute of Astronomy

Date:

Friday December 11th 2015

Time:

15:00