compwizz09
New member
2. If the orbital velocity of the Earth in its orbit is 30 km/s, then what is the maximum Doppler shift you expect to see for the H(alpha symbol) absorption line at 656.3 nm? Explain.
3.Why are titanium oxide features only visible in only the coolest stars? Why are the Hydrogen Balmer lines strongest in the mid-to-hot temperature stars? Specifically what spectral type are Hydrogen Balmer lines the strongest?
4. If a binary star system have a .1 M(solar unit) star and a 10 M(Solar unit) star with a measured periastron and apastron of 40 and 80 AUs, respectively, calculate the orbital peiod in years of the binary star system.
3.Why are titanium oxide features only visible in only the coolest stars? Why are the Hydrogen Balmer lines strongest in the mid-to-hot temperature stars? Specifically what spectral type are Hydrogen Balmer lines the strongest?
4. If a binary star system have a .1 M(solar unit) star and a 10 M(Solar unit) star with a measured periastron and apastron of 40 and 80 AUs, respectively, calculate the orbital peiod in years of the binary star system.