Akademik Veri Yönetim Sistemi
EAS Annual Meeting, Padua, İtalya, 1 - 05 Temmuz 2024, ss.1, (Özet Bildiri)
Direct imaging of gas giant planets offers crucial insights into their atmospheric properties, orbital characteristics, and interactions with proto-planetary disks. By detecting and studying these directly imaged planets, we can infer formation mechanisms, migration pathways, and long-term evolution within their respective systems. These observations provide valuable constraints for refining theories of planet formation and dynamical evolution, contributing to our broader understanding of exoplanetary systems.
We present the potential of the forthcoming direct imaging system of the DAG Telescope, a 4m near-infrared telescope equipped with active and adaptive optics and the SLM-based coronagraph, PLACID, in terms of imaging faint low-mass bodies, down to exoplanet-regime, around stars. PLACID will be effectively working in the H-band for the moment with a possible upgrade to incorporate Ks-band in the near future. The exAO system of the DAG Telescope, known as TROIA, was designed and built in Türkiye and will allow us to reach Strehl ratios of 80% using natural guide stars down to 15-magnitude.
As a starting point, we compiled a list of known exoplanets with periods larger than one year from the NASA Exoplanet Archive, Extrasolar Encyclopedia, and the Open Exoplanet Catalogue. We computed the H-band contrast ratios using various stellar ages, chemical abundances, as well as different planetary atmosphere and evolution models to estimate their surface flux values. Subsequently, we compared the locations of these systems with the theoretical contrast curve for the DAG direct imaging system on an angular separation-contrast diagram. In this work, we present fundamental details of the DAG imaging system alongside our preliminary results.