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Nature of the Distant Component in the Triple System DV Cam
Zejda, M.; Bakış, V.
DV Cam (HD 34233) is a relatively bright spectroscopic binary system exhibiting complex variability. This study presents an extensive analysis of its orbital dynamics and pulsational behavior using multi-source photometric data, including the Hipparcos, ground-based, and TESS satellite observations. The O–C residuals analysis reveals a sinusoidal …
Spectroscopic and Photometric Observations of the Supernovae SN2020JEE
Ismailov, N. Z.; Khalilov, O. V.; Mikhailov, Kh. M. +2 more
Information on the SN2020jee supernova is first listed in the web page Gaia Alert Index list (http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia20cgo/). These data are as follows: date of observation 2020-05-13 UT 08:17:40 (JD 2458982.85), with coordinates RA (2000) = 11: 42: 14.70 DEC (2000) = 20: 05: 51.07. The object is located approximately in the …
Atmospheric Parameters and Evolutionary CP Stars. I.21 COM from the Old Comae Berenices Cluster
Aliev, S. G.; Alishova, Z. M.
On the basis of Hipparcos observations and complex observations carried out at the Shamakhy Astrophysical Observatory named after N. Tusi of the National Academy of Sciences of Azerbaijan, the main parameters of the atmosphere and the evolutionary status of the magnetic CP star 21 Com from the old Comae Berenices cluster have been determined.Almos…
Ultraviolet Spectrum Variability of BP Tau
Ismayilov, N. Z.; Alimardanova, F. N.; Baheddinova, G. R.
Results of the ultraviolet IUE archive spectrum of classic T Tauri type star BP Tau had been presented. Spectroscopic parameters of mainly strong emission lines were measured. On the more full massive of measurements of the emission doublet MgII λ2800 Å variability of the intensity with period P=8.275±0.005 days with high confidence level was obta…