Curve of Growth Analysis of SZ Lyn
Janaka Adassuriya,
Astronomy and Space Science Unit, Department of Physics, University of Colombo, Sri Lanka. Corresponding author: janaka@phys.cmb.ac.lk
Shashikiran Ganesh,
Astronomy and Astrophysics Division, Physical Research Laboratory, Ahmedabad, India
Peter De Cat,
Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussels, Belgium
Santosh Joshi,
Aryabhatta Research Institute of Observational Science (ARIES), Manora Peak-Nainital, India
Chandana Jayaratne,
Astronomy and Space Science Unit, Department of Physics, University of Colombo, Sri Lanka
Abstract
We present one high-resolution and a time series of 561 low-resolution follow-up spectroscopic observations of SZ Lyn. It is a high-amplitude δ Scuti-type pulsating star in a binary system. The photometric observations reveal the existence of radial and non-radial oscillation modes in SZ Lyn. In spectroscopy, the variation of equivalent width of the line profiles reflects the temperature variations. The equivalent widths of the Balmer lines, Hα, Hβ, and Hγ were measured over the pulsation cycle of SZ Lyn using time sequence spectra. Hence, the temperature profile of SZ Lyn was derived using the curve of growth analysis. Furthermore, the stellar parameters were determined through the best fit analysis of observed and synthetic high-resolution spectral lines. The best fit determines a model of Teff = 6750 K, log g = 3.5 dex, and vrot = 10 km s−1 for solar abundance.
Keywords : curve of growth, equivalent width, temperature profile, pulsating stars, SZ Lyn
Pour citer cet article
Janaka Adassuriya, Shashikiran Ganesh, Peter De Cat, Santosh Joshi & Chandana Jayaratne, «Curve of Growth Analysis of SZ Lyn», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 470-477 URL : https://popups.uliege.be/0037-9565/index.php?id=11753.
