2018年IAO实测低年组第6题-变星的脉动周期
英文题目
Pulsation peroid of a variable star. SZ Lyn is a δ Scuti (δ Sct) type short period pulsating star. the star is observed in B band at Mount Abu Observatory, India. The light curve data are given in the table 6. The different magnitudes were taken by observing a comparison star in the same field. The time is in Julian Days(JD). This data set is only for one observation night and therefore integer part of the JD does not change. You are asked to produce the light curve for this observation.
6.1. Plot the data points, differential magnitude against the Julian Day（JD).
6.2 Draw a smooth light curve throgh the data pionts.
6.3. The period of pulsation is assumed to be the between consecutive maxims in the light curve. Estimate the pilsation period (P) of SZ Lyn.
6.4. Calculate the absolute magnitude of SZ Lyn, if the perios-;uminosity relationship for δ Scuti type stars is given by empirical formal
$$M_{b}\ =\ -2.36\ lg\ P\ -\ 0.62$$
6.5. If the apparement magnitude (mB) of SZ Lyn is 9.7m, estimate the distance to SZ Lyn.
