Research

My research

Currently, my research mainly focuses on three fields. One of them is related to discerning the properties of evolved compact stars by using their natural vibration frequencies as a probe of their internal structure. This approach, referred to as asteroseismology, allowed us to determine a range of stellar properties, such as brightness, distance, size, mass, rotation period and binarity (including planets). The evolutionary modeling by means of the MESA and GYRE is pioneered as about sounding evolved models. The second field is related to open clusters. Using Kepler data we found around 600 variable stars in two clusters. We have classified them according to their variability types. We will be collecting additional multicolor photometry and spectroscopy with ground-based telescopes. The third field is related to systems with exoplanets. We have successfully applied a novel method to use an occultation in binary systems for component masses and eccentricity estimations (already published), and now we will be applying the method to occultations in star-planet systems to infer their precise masses. Since I work with time-series data, a by-product of all my research can be exoplanet detection and we already found a few, though it is not our primary goal. My research projects are collaborative efforts and I have included many students in my work. Recently, I have established the ARDASTELLA Research Collaboration consisting of faculties, staff, PhD and undergraduate students.

My research projects

My activity in grant review committees allowed me to increase my experience in preparing grant proposals, which resulted in a number of successful grant applications.

Past and current Awards:

1. Multiplet splitting change in a pulsating subdwarf B star: Balloon 090100001 - completed

2. Stellar pulsations in Main Sequence M stars - completed

3. From pulsation frequencies to stellar interiors - a very important step in asteroseismology of pulsating hot subdwarfs - completed

4. Asteroseismology of pulsating hot subdwarfs observed with the Kepler spacecraft - completed

5. Evolution and the instability strip of hot subdwarfs in two old open clusters - completed

6. Demystifying hot subdwarf B stars by means of data taken with the Kepler, TESS and GAIA space telescopes - ongoing