Arshia Maria Jacob
Johns Hopkins University
HyGAL and a series GREAT hydride observations
Owing to the complexity of their energy level structures and as a result their chemical fingerprints or spectra– molecules, observed in either emission or absorption form unique diagnostic probes of the physical conditions in which they are found. In addition to forming excellent probes of astronomical conditions, molecules play a central role in influencing the thermal and ionization structure of gas, initiating condensations and instabilities responsible for the formation of stars and as a result regulate the evolution of the environments in which they are formed. While astronomical spectra reveal a wealth of knowledge, their interpretation is complicated by the need for a detailed understanding of their chemistry and often limited to the study of simpler systems such as light hydrides. In this talk, I will present to you the use of hydrides in addressing fundamental questions concerning the life cycle of molecular material in the Universe under the umbrella of the HyGAL legacy survey and other observations and highlighting the critical role played by the SOFIA/GREAT instrument in aiding these results. I will conclude by discussing the valuable legacy provided by HyGAL for future studies of the ISM and the role it plays in future hydride observations.
