Comparative analysis of a binary system HD 135344 with a protoplanetary disk

The chemical composition of two binary stars, HD 135344A and HD 135344B, is compared, from which conclusions can be drawn about the protoplanetary disk around the star HD 135344B. Since binary stars are form from the same gas and dust cloud, their chemical composition is thought to be similar. To study the protoplanetary disk around the secondary star we have to characterize the host star and the primary star for a comparative analysis. The HD 135344B disk is one of the least known transition disks, which has asymmetrical properties in scattered light and heat radiation. Photometric images of near-infrared scattered light shows two big spiral arms and an internal dust-free cavity.

Spectral observations are used to determine the physical parameters and chemical composition of stars, which are matched to synthetic model spectra. The synthetic or model spectrum is found by the Zeeman spectrum sythesis code, which is written in the programming language Fortran. 

In our presentation, we will present our conclusions regarding the chemical composition of the HD 135344B disk based on the comparative analysis of the binary system’s chemical composition.