PHOTOMETRIC STUDY OF THREE SHORT PERIOD VARIABLE STARS
نویسندگان
چکیده
منابع مشابه
Photometric Study of Variable Stars in the Open Cluster NGC
We report the discovery of 19 variable stars and two blue–stragglers in the field of the open cluster NGC 6866. Three of the variable stars we classify as δ Sct, two, as γ Dor, four, as W UMa, two, as ellipsoidal variables, and one, as an eclipsing binary. Seven stars show irregular variability. Two of the pulsators, a δ Sct star NGC 6866-29 and a γ Dor star NGC 6866-21, are multiperiodic. From...
متن کاملEUVE Investigation of Three Short-Period Binary Stars
EUVE satellite spectroscopic observations (SW, MW and LW bands covering 80 – 160, 170 – 350 and 450 Å with resolutions 0.5, 1 and 2 Å) and photometric observations (Deep Sky Survey, broad-band 70 – 140 Å) have been obtained for two contact, 44i Boo B and VW Cep, and one detached, ER Vul, close binary stars. All three systems have orbital periods shorter than one day and thus are expected to sho...
متن کاملEnvelope tomography of long - period variable stars ⋆
This paper is the first one in a series devoted to the study of the dynamics of the atmospheres of longperiod variable (LPV) stars. Results from a two-monthlong monitoring of the Mira variables RTCyg and XOph around maximum light with the ELODIE spectrograph at the Haute-Provence Observatory are presented. The monitoring covers phases 0.80 to 1.16 for RTCyg and phases 0.83 to 1.04 for XOph. The...
متن کاملLINEAR PULSATION CHARACTERISTICS OF MIRA VARIABLE STARS
The linear adiabatic pulsation-periods of Mira variable stars have been derived. Approximately 2701[1]models were calculated for M = 0.7 MΘ to 2 MΘ stars with radii from 180 RΘ to 340 RΘ and luminosities from 2800 LΘ to 10,000 LΘ. The chemical composition of all models is (X,Z) = (0.7,0.02). From the result of this study, linear relations on Luminosity-Period-Mass relationship and luminosity-pe...
متن کاملThe light curves of the short-period variable stars in ω Centauri
The Fourier decomposition was applied to the light curves of the short period variable stars discovered by the OGLE team (Kaluzny et al. 1996, 1997) in ω Cen. The progression of the φ21 parameter as a function of the period is extended toward very short periods as the new values connected directly to those of stars located in the Galaxy. However, two groups of stars deviate: the first is locate...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Revista Mexicana de Astronomía y Astrofísica
سال: 2020
ISSN: 0185-1101
DOI: 10.22201/ia.01851101p.2020.56.02.08