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A Deep Study of the Open Cluster NGC 5288 Using Photometric and Astrometric Data from GAIA DR3 and 2MASS
Bisht, D.; Sethi, R.; Rangawal, G. +1 more
This paper investigates a poorly studied open cluster, NGC 5288, using 2MASS JHKS and the recently released Gaia DR3 astrometric and photometric data. The mean proper motions in right ascension and declination are estimated as (‑3.840 ± 0.230) and (‑1.934 ± 0.162) mas yr‑1 respectively. We also derive the age and distance of …
RR Lyrae Stars in the Globular Cluster Palomar 2
Arellano Ferro, A.; Muneer, S.; Bustos Fierro, I. +1 more
A CCD VI imaging time-series over 11-year is employed to explore the light curves of stars in the field of Palomar 2. We discovered 20 RRab and 1 RRc variables. A revision of Gaia-DR3 data enabled us to identify 10 more variables and confirm the RRab nature of 6 of them and one RGB. The cluster membership is discussed, and 18 variables are most li…
Astrophysical Studies of 9 Unstudied Open Star Clusters Using GAIA DR3
Tadross, A. L.; Badawy, W. A.; Hendy, Y. H. M. +2 more
Using the Gaia DR3 data sets, this work gives an analysis of nine open clusters: Dolidze 25, Kronberger 13, Kronberger 18, Majaess 99, NGC 7795, Ruprecht 139, Teutsch 55, S1, and FSR 0596, which are close to the Galactic plane of the Milky Way. The number of probable cluster members is found to be 81, 77, 120, 155, 108, 110, 160, and 116 respectiv…
Solar-Type Eclipsing Binary KIC 4832197: Physical Properties and Intrinsic Variability of the Components
Özdarcan, O.; Dal, H. A.; Yoldaş, E.
Comprehensive analysis of optical spectroscopy and space photometry of the solar type eclipsing binary system KIC 4832197 is presented. The system is composed of F7V + F9V components with masses of M1 = 1.16 ± 0.12 M⊙, M2 = 1.07 ± 0.10 M⊙ and radii of R1 = 1.26 ± 0.04 R⊙, R2
Photometric Analysis of Eclipsing Binaries: VY UMi, RU UMi and GSC 04364-00648
Parimucha, Š.; Kudak, V.; Perig, V. +1 more
We present the photometric analysis of BVR and TESS light curves of three eclipsing binaries, together with their period changes considering archival data and new minima times from our and TESS observations. For the first time we detected wave-like variations with low-amplitude in O − C residua of RU UMi, which can be interpreted as a consequence …
Tracing the Assembly Histories of Galaxy Clusters in the Nearby Universe
Andernach, H.; Caretta, C. A.; Coziol, R. +10 more
We have compiled a sample of 67 nearby (z < 0.15) clusters of galaxies, for which on average more than 150 spectroscopic members are available and, by applying different methods to detect substructures in their galaxy distribution, we have studied their assembly history. Our analysis confirms that substructures are present in 70% of our sample,…
Physical Properties and Membership Determination of the Open Clusters IC 4665, NGC 6871 and Dzim 5 Through uvby − β Photoelectric Photometry
Peña, J. H.; Rentería, A.; Paredes, J. D. +1 more
uvby − β photoelectric photometry of stars in the direction of the open clusters IC 4665, NGC 6871 and Dzim 5 is presented. From this uvby − β photometry we classified the spectral types which allowed us to determine the reddening and, hence, the distance. Membership of the stars to the cluster was determined. Our results are compared with those o…
A Peculiar Galaxy Near M104
Quiroga, E.
Messier 104, NGC 4594, also known as the Sombrero Galaxy, has been extensively studied, especially its structure and stellar halo. Its abundance of globular clusters has given rise to many theories and much speculation. However, other objects in the vicinity of such a spectacular galaxy are sometimes ignored. While studying HST images available on…
A Study of the NGC 1193 and NGC 1798 Open Clusters Using CCD UBV Photometric and Gaia EDR3 Data
Bilir, S.; Yontan, T.; Çakmak, T. +8 more
We present photometric, astrometric, and kinematic studies of the old open star clusters NGC 1193 and NGC 1798. Both of the clusters are investigated by combining data sets from Gaia Early Data Release 3 (EDR3) and CCD UBV observational data. E(B − V) color excesses are derived for NGC 1193 as 0.150 ± 0.037 and for NGC 1798 as 0.505 ± 0.100 mag th…
A Vindication of the RR Lyrae Fourier Light Curve Decomposition for the Calculation of Metallicity and Distance in Globular Clusters
Arellano Ferro, A.
We report the mean metallicity and absolute magnitude of RR Lyrae stars in a sample of 37 globular clusters, calculated via the Fourier decomposition of their light curves and ad hoc semi-empirical calibrations, in an unprecedented homogeneous approach. This enabled a new discussion of the metallicity dependence of the horizontal branch (HB) lumin…