Search Publications
Exploring the physical properties of the γ Dor binary star RX Dra with photometry and asteroseismology
Liao, Wen-Ping; Zeng, Qi-Huan; Li, Ping +2 more
We model the TESS light curve of the binary system RX Dra, and also first calculate a lot of theoretical models to fit the g-mode frequencies previously detected from the TESS series of this system. The mass ratio is determined to be q=0.9026‑0.0032+0.0032. We newly found that there are 16 frequencies (F1–F7, F11–F20) identified as dipole g-modes,…
First photometric study of W UMa-type binary systems: BK Vul and V699 Cep
Soydugan, E.; Adalalı, S.
In this study, new CCD photometric observations and photometric analysis of BK Vul and V699 Cep systems, which are classified as contact binaries in the literature, are presented. For the V699 Cep, the TESS light curve was also used in the photometric analysis. We determined the basic astrophysical parameters of the BK Vul and V699 Cep systems fro…
Gaia (DR3)-based astronomical analysis of the seven unstudied open star clusters
Tadross, A. L.; Badawy, W. A.; Hendy, Y. H. M. +2 more
The seven open star clusters FSR 0717, FSR 1698, Loden 2313, Ruprecht 49, Majaess 61, Mayer 2, and Teutsch 48, which are located near the Milky Way's Galactic plane are studied in this article using the Gaia DR3 dataset. The estimated numbers of potential cluster members are 102, 362, 285, 197, 95, 116, 160, and 397, correspondingly. The calculate…
The improved component masses and parallaxes for the two close binary stars: HD80671 and HD97038
Masda, Suhail
We present the fundamental stellar parameters, including the individual component masses, as well as the orbital parameters, and dynamical parallaxes of the two close binary stars; HD80671, and HD97038. The stellar parameters are spectrophotometrically estimated via Al-Wardat's method for analyzing binary and multiple stellar systems, which is hav…
Berkeley 76: An intermediate age open star cluster in Gaia Era
Bisht, D.; Rangwal, Geeta; Raj, A. +3 more
We studied the open star cluster Berkeley 76 using Gaia DR3 and 2MASS data sets. We obtained 314 most probable cluster members with a membership probability greater than 80%. We have found the cluster center as α = 106.67 ± 0.07 deg and δ=‑11.75±0.07 deg. The mean PMs of cluster members in right ascension and declination are ‑0.60±0.22 and 1.35 ± …
Evidence of a sub-solar star in a microlensing event toward the LMC
Nucita, A. A.; De Paolis, F.; Franco, A. +1 more
Gravitational microlensing is known to be an impressive tool for searching dark, small, and compact objects that are missed by the usual astronomical observations. In this paper, by analysing multiple images acquired by DECam, we present the detection and a complete description of the microlensing event LMC J05074558-65574990 which is most likely …
The first light curve analysis of twin binary system V1175 Cas using ground-based and TESS data
Alan, Neslihan
Eclipsing binary systems hold a central position within astrophysics in that the fundamental parameters of stars can be determined by direct observations. The simultaneous analyses of high-quality space observations, combined with ground-based photometric data, have allowed more sensitive detection of fundamental stellar parameters by multicolor p…
Asteroseismology of evolved stars in six star clusters observed by Kepler/K2
Chang, Heon-Young; Jo, Yun-A.
In this study, we have explored the frequency separations,
Pulsational and eclipsing nature of TIC 140736015
Gürol, B.; Zhou, A. -Y.
We present the discovery of
XMM-Newton's view of a RS CVn binary CF Tuc
Sriram, K.; Agrawal, Vivek K.; Lahiri, Deblina +1 more
Coronal emission exhibited by the chromospherically active binaries is important to understand the underlying mechanism. We report the X-ray spectral studies of an RS CVn source CF Tuc using XMM-Newton archival data. The light curve was found to be steady with no flaring activity and the source was in a quiescent X-ray emission state. The source s…