What two properties define the stellar populations of a star cluster?
Two categories of star clusters can be distinguished:
What two properties define the stellar populations of a star cluster?
What changes in stellar properties are represented by the different locations of isochrones of different ages? What physical processes occuring inside the star underlie those changes?
2. Stellar deflection of light at massive star. What is the expected angular deflection of a distant star's position if its light passes very close to the limb of a 10 solar mass main-sequen star? Note: The radius is linearly proportional to mass for a main sequence star.
A telescope with aperture diameter 1.0 m is used to observe a globular star cluster. What is the best resolution possible for this telescope? That is, what is the minimum angular separation needed to distinguish two objects? a. 0.732 radians b. 0.6 degrees c. 0.49 radians d. 36.9 degrees
Star cluster radius D has observer stand in the middle of it.It has apparent magnitude -1.7 .If sun has m=-26.7 and it far from star cluster d find number of star in this star cluster
Stellar RadiiThe red supergiant (RSG) star Betelgeuse has a luminosity of 120,000L, and a surface temperature ofaboutTeff= 3650 K. What is its’ radius (in both metres and astronomical units)?
One of the end stages of stellar life is a neutron star, where matter collapses and electrons combine with protons to form neutrons. Some liken neutron stars to a single gigantic nucleus. Calculate the radius in meters of a neutron star with a mass 2.96 x 1030 kg, treating it as a giant nucleus. Consider the mass of a nucleon 1.675 x 10-27 kg. Your answer should be in the form of N x 104 years. Enter only the number...
Question 9 10 pts One of the end stages of stellar life is a neutron star, where matter collapses and electrons combine with protons to form neutrons. Some liken neutron stars to a single gigantic nucleus. Calculate the radius in meters of a neutron star with a mass 3.17 x 1030 kg, treating it as a giant nucleus. Consider the mass of a nucleon 1.675 x 10-27 kg. Your answer should be in the form of Nx 104 years. Enter...
1) You want to observe a "monster" stellar flare on a young star referred to as a megaflare with 10,000 times more energy than the most powerful explosion ever observed on the Sun. Such a powerful eruption heats the plasma to the temperature of 220 million Kelvins, which is more than 10 times hotter than the temperature at the Sun's center. What type of technology (telescope, detector) will you use to observe such an event? Defend your choice.
I need question 6
5. Stellar Parallax and a Parsec (15 pts.) A star with l arcsecond parallax angle (0) it is definedto be 1 parsec away. Let's calculate the value of a parsec. Examine the diagram below. When viewed from the two positions (3 months apart), the star's position shifts by the angle e. Sun Earth Star (a) What is the distance (a) in km? (b) The distance (b) can be derived from trigonometry, tan(6) -alb. What is the...
1. Supermassive Stars: Basic Properties There is a theory, in part developed by your professor, that under extreme conditions in the early Universe, supermassive stars could have formed. Such stars are estimated to have masses of order M. ~ 10>Mo. They are beyond the horizon of what the best available telescopes can currently see, but the upcoming James Webb Space Telescope (JWST) should be able to detect them at redshifts 10. Work out, by employing simplified ('back-of-the-envelope') arguments, some of...