IAO 2015, Практически тур, Група β — Задача 7. Spectral observations
XX Международная астрономическая олимпиада / XX International Astronomy Olympiad, Россия, Татарстан, Казань, 15 – 23. X. 2015 / Kazan, Tatarstan, Russia — Round: Prac, Group: β · 15 октомври 2015 г.
Requirements
Languages of the solutions. (For Practical and also for Observational rounds). No text in any language is permitted to use in solutions. All the solution must be written using only drawing pictures, plotting graph, writing formulae, numerical values and standard international astronomy symbols (like ♂, ♎, α UMa, M31, ). Numerical values must be written using standard symbols but not symbols of National alphabet. Jury of the Practical round will not take into account any text in any language in solution.
For example, the names of constellations, written in English, Russian or any other language will be not taken into account (should be only UMa, Ori, etc.).
Требования
Языки написания решений задач. (На практическом и наблюдательном турах). Тексты в решениях не допускаются (ни на каком языке). Все решения должны содержать только рисунки, графики, формулы, численные значения и стандартные международные астрономические символы (такие как ♂, ♎, α UMa, M31, ). Цифры должны быть написаны стандартными символами (не символами национального алфавита). Жюри практического тура не будет учитывать какие-либо тексты (на любом языке) в решении.
Например, не учитываются названия созвездий, написанные на английском, русском или любом другом языке (должно быть только UMa, Ori и т.д.).
Условие
Astronomer performed spectral observations of a single star at the one and a half meter KFU telescope RTT-150 during a year. The spectrograms with marks of observation time are given to you for analysis (see separate sheet).
The abscissa is wavelength, the ordinate is intensity in arbitrary units. Spectra are shifted by Y-axis for better visibility. The same spectrum with laboratory wavelengths is drawn by the bold line.
It's recommended to measure at least two spectral lines for better accuracy.
| date | λ(measur) | Δλ | Vr |
|---|---|---|---|
7.1.
Draw a table in form of the above example (columns 2, 3, 4 must be replicated as much, as many lines you measured). Calculate the radial velocity Vr of the star on each date, the results of measurements and write calculations into the table.
7.2.
Plot the radial velocity curve, the graph of Vr vs time function.
7.3.
Find equatorial coordinates of the star.
7.4.
Indicate the accuracy of radial velocity in your measurements.
Решение
Внимание: Непълно решение
No official practical solution or grading key is present in the complete 2015 archive inventory.
Оригинал в Архива: pract_beta.pdf · допълнителни данни: pract_instr.pdf · допълнителни данни: pract_beta_data.pdf