Zobrazeno 1 - 10
of 44
pro vyhledávání: '"W. H. Elsanhoury"'
Publikováno v:
Journal of Astrophysics and Astronomy. 43
This study reports the first comprehensive astrometric, photometric and kinematical analysis of four newly discovered open clusters; namely QC1, QC2, QC3, and QC4, using astrometric and photometric data from the most recent Gaia EDR3 for G=50%) star
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76da831710ef68085d3ed38d5ab90f11
https://doi.org/10.1007/s12036-022-09810-1
https://doi.org/10.1007/s12036-022-09810-1
Autor:
W. H. Elsanhoury, Mohamed I. Nouh
Publikováno v:
Astrophysics. 63:179-189
In the present paper, we aim to determine the kinematical properties, velocity ellipsoid, and Oort constants using a sample of halo red giants. The study is based mainly on the space and radial velocities of about 1583 red giant stars collected from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b319315efd057707b251a811402145b7
https://doi.org/10.1007/s10511-020-09624-5
https://doi.org/10.1007/s10511-020-09624-5
Autor:
W. H. Elsanhoury
Publikováno v:
Astronomy Reports. 64:199-210
Based on space velocity components UVW and using a recent dataset for Castor and Ursa Major moving groups, we compute the apex position with two methods. Classical convergent procedures give (Acp, Dcp) = (80$$_{.}^{\circ}$$7830, –17$$_{.}^{\circ}$$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aae4226fedc35f6fb282ac665745db45
https://doi.org/10.1134/s1063772920030038
https://doi.org/10.1134/s1063772920030038
Autor:
W. H. Elsanhoury
Publikováno v:
Astronomy Reports. 64:94-106
The work on the kinematical parameters and spatial shape structure have been performed with Gaia DR2 astrometry data of the new recently southern discovered open clusters; UFMG 1, UFMG 2, and UFMG 3 in the vicinity (1.3 degrees radius) of the rarely
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52118c1c00190c636d477bdbba3e0286
https://doi.org/10.1134/s1063772920010023
https://doi.org/10.1134/s1063772920010023
Autor:
D. Bisht, Qingfeng Zhu, W. H. Elsanhoury, R. K. S. Yadav, Geeta Rangwal, Devesh P. Sariya, Alok Durgapal, Ing-Guey Jiang
Publikováno v:
The Astronomical Journal. 164:171
Open clusters are groups of stars that form simultaneously; hence, these are excellent probes to test theories of star formation, stellar evolution, and dynamics in the Milky Way disk. We carry out a detailed photometric and kinematic study of five p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::063d866c4757691ae939f5f906cfb296
https://doi.org/10.3847/1538-3881/ac8cf4
https://doi.org/10.3847/1538-3881/ac8cf4
Autor:
Mohamed I. Nouh, W. H. Elsanhoury
Publikováno v:
New Astronomy. 72:19-27
In this article, we present a morphological study of two extended open clusters in the sky, Melotte 22 and Melotte 25 using J, H, and Ks photometry with Gaia DR2 and PPMXL proper motions. Various photometric and kinematic astrophysical parameters hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51b1a97f188b14e21085001f211be1e5
https://doi.org/10.1016/j.newast.2019.04.006
https://doi.org/10.1016/j.newast.2019.04.006
Autor:
Geeta Rangwal, Devesh P. Sariya, Qingfeng Zhu, D. Bisht, Alok Durgapal, W. H. Elsanhoury, R. K. S. Yadav, Ing-Guey Jiang
The membership determination for open clusters in noisy environments of the Milky Way is still an open problem. In this paper, our main aim is provide the membership probability of stars using proper motions and parallax values of stars using Gaia ED
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2b8edcb05a583e47de898f1728f5829
http://arxiv.org/abs/2104.01059
http://arxiv.org/abs/2104.01059
Truly, kinematics in the Solar neighborhood has provided important information both for the structure and for the evolution of the Galaxy since the early 20th century. The relationship between Oort constants and the ratio of the velocity dispersion a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff93322afb111c963c56f4e6c574b15b
Autor:
W. H. Elsanhoury
We present a photometric and kinematical analysis of two poorly studied open clusters, Koposov 12 (FSR 802) and Koposov 43 (FSR 848), by using cross-matched data from PPMXL and Gaia DR2 catalogs. We used astrometric parameters to identify 285 and 310
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::712600db40c61b62b774bb62dac21f81
The orbits of visual binary systems still attract many of the working groups in astronomy. These orbits are the most important and reliable source of the stellar masse. In the present paper, we are going to compute orbits and dynamical masses of some
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a36e474c3aa9233814061efc72e14905
http://arxiv.org/abs/2007.14522
http://arxiv.org/abs/2007.14522