# Workshop on LABORATORY ASTROPHYSICS: Interstellar Gas, Dust and Ice

28-30 September 2016
Tagungstätte Schloss Ringberg, Kreuth
UTC timezone
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# Contribution Contributed Talk

MORNING SESSION - GAS, DUST, ICE AND BEYOND

# Detection of $^{13}\text{C}$-substituted $\text{C}_3$ towards SgrB2

## Speakers

• Prof. Thomas GIESEN

## Content

Small carbon chain molecules like linear $\text{C}_3$ are thought to play a crucial role in the formation of larger, complex molecules, including pre-biotic species. The formation pathways of organic molecules with carbon chains as backbones is by far not well understood. Studies of isotope fractionation have proven to be a useful tool of tracing chemical reaction pathways and to elucidate formation and destruction processes of interstellar molecules. Recently, laboratory measurements of $\text{C}_3$ and its $^{13}\text{C}$-isotopologues were conducted at the Kassel laboratories in order to obtain precise spectral line positions at THz-frequencies for future interstellar observations. We used the GREAT-receiver onboard SOFIA for a first time detection of $^{13}\text{CCC}$ towards SgrB2(M). In this talk we present first results and possible implications of the observation. For details on laboratory results of $\text{C}_3$ and its isotopologues see our poster: High Resolution Terahertz-Spectra of the $\nu_2$-Bending Mode of Linear $\text{C}_3$ and its $^{13}\text{C}$-Isotopomers.