A binary system has stars whose masses are 7M and 13M with an
orbital period of...
A binary system has stars whose masses are 7M and 13M with an
orbital period of 5 years, approximate the total energy of the
system?
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6. For binary star system 4U-0115, the orbital period for each
of the stars is 24.3 days and the distance between the stars is
0.28 AU. One of the stars is twice as massive as the other.
What is the mass of the smaller mass
star in solar masses?
Spectra are taken of two stars in a binary system: Star A and
Star B. Every 1.56 days, the H? line in star A goes from 2.5 ?A
blueward of its rest (laboratory) wavelength to 2.5 ?A redward then
back to 2.5 ?A blueward. The H? line in star B also cycles through
shifts redward then blueward and back to redward with respect to
the rest (laboratory) wavelength of H? every 3.96 days but its
maximum deviation from the rest...
System A has masses m and m separated by a distance r; system B
has masses m and 2m separated by a distance 2r; system C has masses
2m and 3m separated by a distance 2r; and system D has masses 4m
and 5m separated by a distance 3r.
Rank these systems in order of decreasing gravitational
force.
If rank items are equivalent, state as such; if the correct
ranking cannot be determined, state as such.
Pluto has an orbital period of 248 years, and the dwarf planet
Eris has an orbital period of 557 years. What is the average
distance (semimajor axis) of Eris from the Sun, and how does it
compare to the average distance between Pluto and the Sun? Express
your answers in astronomical units (AU).
Two stars of equal mass orbit one another. (This is called a
binary star system.) If the stars’ orbits have a semimajor axis of
2.5x10^8 km and complete one orbit every 2.4 years, what is the
mass of each star? pick from: (8.1x10^29 kg, 1.6x10^30 kg,
8.1x10^20 kg, 1.6x10^21 kg)
A satellite orbits a planet at a distance r. If it has a
circular orbit, the total energy (E=K+U) of the satellite is equal
to:
Hint: F_centripetal=mv^2/r pick from: (E=0,...
A binary star system consists of two stars, each of mass 2 *
10^30 ??. The initial positions of Star A and Star B are ?⃗?? =
〈−3, −4, 0〉 * 10^9 ? and ?⃗?? = 〈3, 4, 0〉 * 10^9 ? respectively.
The magnitude of the gravitational force that one star exerts on
another is about 2.7 * 10^30 N.
The initial velocity of Star B is ?⃗?? = 〈−6.5,4.9,0〉*10^4 ? ? .
What is the approximate velocity of...
Suppose you are observing spectroscopic binary system of two
stars, each with M = 1 solar mass and T = 5770K. How far apart
would the stars have to be for you to distinguish seperate Halpha
lines?
Question 4: Alpha Centauri is a binary star system (the two
individual stars are called Alpha Centauri A and B) that is part of
a triple star system (the third star is Proxima Centauri). This is
the closest star system to the Sun. Alpha Centauri A and B are so
close that if they are viewed with the naked eye they are seen as
one star from the Earth. The absolute magnitude of Alpha Centauri A
is 4.4, while the...
Assume that there was a starburst that produced 1011
solar masses of stars with a minimum mass of 0.3 solar masses and a
maximum mass of 100 solar masses. The number of stars as a function
of mass is N(M) = KM-2.35, where K is a normalization
constant. The current turnoff mass of the population is 1 solar
mass
Compute the number of stars and the total mass of stars that
are still on the main sequence.
Assume that all...
Derive an expression for the total number of stars between
masses M1 and M2, where M1 < M2.
Can the Salpeter IMF extend to arbitrarily low mass stars?
Justify your answer quantitatively
Derive an expression for the total mass in stars formed with
masses between M1 and M2, where M1 < M2.