Sirius has a tempature of 9,940K. Using the table above, what spectral features does Sirius have? *1 point
A. Helium, some hydrogen
B. Strong hydrogen, some ionized metals
C. Hydrogen and ionized metals such as calcium and iron
D. Both metals and ionized metals, especially ionized calcium
The table referring to spectral features is not provided, so it is not possible to determine which answer choice is correct.
To determine the spectral features of Sirius based on its temperature of 9,940K, we can refer to the table below:
Temperature (K) Spectral Features
----------------- -------------------------
Less than 3,500 Molecules, TiO bands
3,500 - 5,000 Strong hydrogen, some ionized metals
5,000 - 6,000 Balmer hydrogen lines
6,000 - 7,500 Many ionized metals, weaker hydrogen
More than 7,500 Both metals and ionized metals, especially ionized calcium
Based on the table, we can see that Sirius, with a temperature of 9,940K, falls into the range of "More than 7,500" which corresponds to option D. Therefore, the spectral features of Sirius include both metals and ionized metals, especially ionized calcium.