A Problem book in Astronomy and Astrophysics, Edition: 1st by Aniket Sule

By Aniket Sule

This can be a compilation of difficulties from the overseas Olympiad in Astronomy and
Astrophysics (2007-2012).

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00 magnitudes per kiloparsec for the filters U, B and V, respectively. Calculate the color indices as they would be measured for the second star. (I12 - T09 - C) 11. An astronomer on Earth observes a globular cluster, which has an angular diameter α and contains N stars, each one with the same absolute magnitude M0 , and is at a distance D from the Earth. A biologist is in the center of that cluster. (I12 - T16 - C) (a) What is the difference between the combined visual magnitudes of all stars observed by the astronomer and the biologist.

87 Sr 86 Sr and also the regression line for each type of (e) Subsequently, help the astronomers to determine the age of each type of the meteorites and error in its estimation. Which type is older? (f) Determine the initial value of along with errors. 87 Sr 86 Sr 0 for each type of meteorites notes: – EA: Due to unique nature of this problem, you may have to use minimum 7 decimal digits for intermediate calculations. This requirement is not consistant with regular practice of deciding number of decimal digits as per significant figures.

The time required to obtain a half number of parents after decay. (c) Knowledge of the ratio between two isotopes is more valuable than just the absolute abundance of each isotop. It is quite likely that 87 there was some initial strontium present. by taking 86Rb as an Sr 87 Sr independent variable and 86 Sr as dependent variable, estimate a simple linear regression model that describes the data. 87 (d) Plot 86Rb versus Sr the meteorites. 87 Sr 86 Sr and also the regression line for each type of (e) Subsequently, help the astronomers to determine the age of each type of the meteorites and error in its estimation.

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