Никола 2019, 28 септември — Задача 1. 7. Variable star.

28 септември 2019г.

Условие

A variable star was explored at the RTT-150 Russian-Turkish telescope in 2003. The observations were performed during whole night at the first time, the 1$^{\mathrm{st}}$ table. The brightness of the variable star was measured occasionally during the other nights, and moments of maximal values of brightness (15.59$^{\mathrm{m}}$) were received on nights 2–5, the 2$^{\mathrm{nd}}$ table. The time is in Julian days, and $m_V$ is the yellow spectral colour magnitude.

7.1. Plot the light curve (magnitude vs time function), determine the moment of maximum in the first night and write result (in Julian days) in form of «$T_0$ = …».

7.2. Calculate the period of the variable star using the data of all 5 nights. Here period means the time between two closest maximums of the brightness. But actually astronomers usually do not know how many periods were passed between two observed maximums, because appropriate weather can not be same every day and a few periods can pass between two observed maximums.

7.3. What type of variable star is this – eclipsing binary or pulsating variable star. (Write in English: Eclipsing or Pulsating respectively.)

Решение

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Оригинал в Архива: 28092019.pdf