Search Publications
Photometric, astrometric, and kinematical characteristics of two Xuyi's open clusters utilizing Gaia DR3 data
Belwal, Kuldeep; Bisht, D.; Bisht, Mohit Singh +6 more
This study reports and examines two poorly studied open star clusters surveyed from XSTPS-GAC, namely Xuyi 15 and Xuyi 23, using the Gaia DR3 catalog data. We identified 570 (Xuyi 15) and 824 (Xuyi 23) stars as highly probable astrometric members with membership probability higher than 60
Complete analysis of the subgiant stellar system: HIP 102029
Mardini, Mohammad K.; Al-Wardat, Mashhoor A.; Abu-Alrob, Enas M. +2 more
In this work, we present a detailed analysis of the individual components of the visual binary system HIP 102029 (R.A. = 20:40:35.32, Dec. = +15:38:35.63). The system was discovered during the European Space Agency Hipparcos mission and has a separation of 220 mas. The analysis uses the ORBITX code and Al-Wardat's method to estimate the orbital, a…
Discovered a new open cluster near the poorly studied Majaess 190
Tadross, A. L.
We present the results of a comprehensive astrophysical study of a newly discovered open cluster, dubbed Ash-1. Using the third data release of the Gaia space mission, Gaia DR3, Ash-1 was accidentally discovered within the constellation Sagittarius in the field of the poorly studied cluster Majaess 190. Here we present the first estimates of these…
The 24 Aqr triple system: A closer look at its unique high-eccentricity hierarchical architecture
Horch, Elliott P.; Abushattal, Ahmad A.; Al-Wardat, Mashhoor A. +4 more
As its periastron passage occurred during the third quarter of 2020, system 24 Aqr is of particular significance. New visual solutions for the latest speckle interferometry observations collected by the Lowell Discovery Telescope (LTD) with its new QWSSI speckle camera are presented here. A variety of techniques were used to analyze the system, in…
Some observational properties of the Herbig Be Star AS 310
Bakış, Volkan; Alishov, S. A.; Ismailov, Nariman Z. +2 more
The results of spectral and photometric studies of Herbig Be-type star AS 310 have been presented. Photometric observations in the BVRcIc bands performed in 2016-2021 showed that the amplitude of the seasonal brightness variations of the star changes smoothly in different years and reaches a maximum of approximately around Δ V ∼ 0.6 mag in 2018. T…
CCD UBV and Gaia DR3 based analysis of NGC 189, NGC 1758 and NGC 7762 open clusters
Bilir, Selçuk; Yontan, Talar; Canbay, Remziye +5 more
This paper presents photometric, astrometric, and kinematic analyses of the open clusters NGC 189, NGC 1758 and NGC 7762 based on CCD UBV photometric and Gaia Data Release 3 (DR3) data. According to membership analyses, we identified 32, 57 and 106 most probable member stars with membership probabilities P ⩾ 0.5 in NGC 189, NGC 1758 and NGC 7762, …
Artificial neural network for star tracker centroid computation
Zapevalin, P. R.; Novoselov, A.; Zharov, V. E.
We propose a unique dataset with star images, their centroids, and a new centroid algorithm based on machine learning, that significantly improves star image centroid performance. The centroid of the star image is the subpixel coordinates on the image plane corresponding to the assumed point source of the light (a star). We have compiled and open-…
Trigonometric parallax discrepancies in space telescopes measurements I: The case of the stellar binary system Hip 84976
Al-Wardat, Mashhoor A.; Hussein, Abdallah M.; Widyan, Hatem +1 more
In addition to the complete set of fundamental parameters of its individual components, we present the solution for the discrepancy between the two main astrometric space telescopes Gaia and Hipparcos, in their measurements of the trigonometric parallax for the stellar binary system Hip 84976. In our analysis of the system, we followed Al-Wardat's…
The first photometric, period variation, and flare activity studies of TIC 24233294: Reviewing with the latest results of well-studied late-type active binaries
Jagirdar, Rukmini; Devarapalli, Shanti Priya; Pothuneni, Ravi Raja +2 more
In the current study, we present the first photometric, period variation, and flaring activity investigations of TIC 24233294. Additionally, we also review and report the flaring activity of five well-studied eclipsing binaries BX Tri, V405 And, GJ 3236, Thor 42, and GU Boo. Using the Transiting Exoplanet Survey Satellite (TESS) data, continuous v…
Photometric and Period Variation study of two contact binaries ASAS J034931-0431.2 and KIC 11413213
Jagirdar, Rukmini; Devarapalli, Shanti Priya; Wakgari, Dereje
We present the first photometric analysis of ASAS J034931-0431.2 and KIC 11413213, two short-period eclipsing contact binaries. Photometric analysis using the Wilson-Devinney method was performed using TESS, Kepler 2, and Gaia DR3 data available. Based on the collected times of minima, period variation studies were carried out and the orbital peri…