Discovery of new Delta Scuti Stars
| Autor: | Kirmizitas, O., Cavus, S., Aliçavuş}, F. Kahraman |
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| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Pulsating stars are remarkable objects for stellar astrophysics. Their pulsation frequencies allow us to probe the internal structure of stars. One of the most known groups of pulsating stars is $\delta$ Scuti variables which could be used to understand the energy transfer mechanism in A-F type stars. Therefore, in the current study, we focused on the discovery of $\delta$ Scuti stars. For this investigation, we followed some criteria. First, we inspected TESS database by eye and discovered some single stars that exhibit pulsation-like behaviour. Our second criterion is $T_{\rm eff}$ and $\log g$ range. The $\delta$ Scuti stars generally have $T_{\rm eff}$ and $\log g$ value in a range of 6300\,$-$\,8500\,K and 3.2\,$-$\,4.3, respectively. Hence, we selected the stars which have TIC $T_{\rm eff}$ and $\log g$ values in these ranges. The other criterion is the pulsating frequency. A frequency analysis was performed for all the candidate stars. In addition, $M_{V}$, $L$ and also $M_{bol}$ parameters of the target stars were determined to calculate the pulsation constants and show their positions in the H-R diagram. The final pulsation type classification was made by considering the frequency ranges and pulsation constants of the stars. As a result of the study, five $\delta$ Scuti, one $\gamma$ Doradus and four hybrid systems were discovered. Comment: 10 pages, Accepted for publication in Astrophysical Bulletin |
| Databáze: | arXiv |
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