The density of a ________________ is greater than the density of a _________________. a. white dwarf; neutron star b. neutron star; black hole c. pulsar; neutron star d. pulsar; white dwarf e. white dwarf; black hole
Q: Which of the following is most likely to occur when mass is continually added to a 1.5 solar mass…
A:
Q: 6. Determine the radius of the event horizon if a star of mass 11 × 1030 kg explodes into a…
A:
Q: Which of the following is least reasonable regarding novae and supernovae? Group of answer choices…
A:
Q: 2) What happens when one of the star ina binary system becomes a black hole.
A: Binary systems are two astronomical bodies that orbit each other around a common center of mass. If…
Q: After a supernova explosion, the remaining core will collapse to form a neutron star if the mass of…
A: After a supernova explosion, the remaining core will collapse to form a neutron star if the mass of…
Q: Q2 In a star with mass M, assume that the density decreases from the center to the surface as a…
A: Density of any object is the mass of that object in per unit volume. If density is of object is…
Q: Two stars are in a closely orbiting binary system. The smaller star (a K-type main sequence star)…
A: The correct option. Following the mass transfer, which of the following is now true of the main…
Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…
A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
Q: Which of the following statements about Supernova 1987A is FALSE? a. it exploded relatively close…
A: Supernova is a cosmological event. When a star reaches to its end time of it's life, then it gets…
Q: A group of graduate students, bored during a cloudy night at a the observatory, begin to make bets…
A:
Q: If a 1.40 Msun neutron star has a radius of 10 km, what is the density (in kg/cm³) of a 1.52 Msun…
A: Consider the neutron star is in a perfect sphere. The expression to solve for the density of the…
Q: What kind of star is most likely to become a white-dwarf supernova? A. a star like our Sun B. a…
A: There are gas and dust particles in outer space when their mass increases they will start attracting…
Q: If spectral lines from a distant galaxy are 30% longer than when the source is at rest, how fast is…
A: Given that: The spectral line from distant galaxy (λ')=30% of source at rest (λ) λ'=30% of…
Q: What is the maximum luminosity for star of 5.76×1010 Msun.
A: In hydrostatic equilibrium, the radiation pressure and gravitational force will balance each other.…
Q: Astronomers think of pulsars not as pulsing objects, but rather like a(n) a. Cepheid variable.…
A: A Cepheid variable is a class of stars, that varies in its apparent magnitude values over a period…
Q: We know that dark matter must exist in galaxies. If not, many of the stars in a galaxy would ...…
A: Dark Matter is an unknown matter which is not visible. The reason behind its invisibility is, it…
Q: GM What is the orbital period of a bit of matter in an accretion disk that is located 3 x 105 km…
A: Time period was found to be 526 seconds So answer to fill in blank is 526. Detailed solution is…
Q: A light curve measures a. luminosity vs. temperature. b. mass vs. luminosity. c. diameter…
A: A light curve is a graph that shows the brightness of an object over a period of time.
Q: Which of the following observatories is most likely to discover a black hole in a binary system? A.…
A: A binary system is defined as a system in which two objects revolve around each other, having a…
Q: White dwarfs have a temperature of 100×103 K. Calculate the maximum wavelength of a White dwarf.
A: A white dwarf is a stellar core remnant that is highly dense and made of electron-degenerate matter.…
Q: What is the peak wavelength (in nm) of a neutron star's luminosity if its temperature is 106 K?
A: As we know that Using weins displacement law,λmax T = b -----(1).where b is a constant. known as…
Q: 38 An AGN hosts a central Black Hole of mass 5×10 kg. The AGN emits at 1/6 of the Eddington limit.…
A: To find the luminosity of the AGN, we first need to calculate the Eddington luminosity (LEdd) and…
Q: Which of the following stars are bright and very cool
A: The Supergiants are cool stars, which are very large and really bright. they're located towards the…
Q: How do black holes form?
A:
Q: Pulsars result from a. expanding red giant stars b. white dwarf supernovas c. spinning neutron…
A: A pulsar is a neutron star that spins and releases concentrated beams of radiation from its poles.…
Q: What is the escape velocity (in km/s) from the surface of a 1.6 M, neutron star? From a 3.0 Mo…
A: The mass of the Sun, M⊙=1.99×1030 kg The radius of the neutron star, r=11 km
Q: 2GM What is the escape velocity (in km/s) from the surface of a 1.1 Mo neutron star? From a 3.0 M.…
A: Escape velocity is the speed that is sufficient for a body to escape from a gravitational center of…
Q: When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end…
A: Introduction :- Here it is given that a star is emitting light and this light is being received by…
| a. |
white dwarf; neutron star
|
|
| b. |
neutron star; black hole
|
|
| c. |
pulsar; neutron star
|
|
| d. |
pulsar; white dwarf
|
|
| e. |
white dwarf; black hole
|
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
- Assume that the laws of Newtonian mechanics and Newtonian gravity still hold for a neutron star, what approximately is the escape velocity at the surface of a 1.4 solar mass neutron with a radius of 10 km? A. 2×108 m/s B. 108 m/s C. 1.5 ×108 m/s D. 2.5 ×108 m/sConsideration of the total energy in a radio lobe of an AGN implies that the energy is distributed evenly between the particles in the lobes and the magnetic field. This implies that the magnetic field scales with observed luminosity L as Select one: a. [417 O b. is independent of L ○ c. 11/11 O d. 12/7 ○ e. LThe supermassive black hole at the center of a galaxy has a mass of 6.5 billion solar masses. If we assume that it is a Schwarzschild black hole, what is the radius of this black hole? A. 18 light hours B. 20 light hours C. 16 light hours D. 14 light hours Is the answer A? S. radius = 3 x 6.5 x 109 x 9.26567-10 = 18.1 light hours Thanks!
- The speed of light in vacuum is 300,000 km/s. Suppose that the pulse rate of a pulsar is 0.001 s. Then its size cannot be bigger than about O A. 30,000 km. OB. 300,000 km. OC.3,000 km. O D. 300 km.Assume that when a certain main sequence star becomes a giant gas, its luminosity increases from L to 1000 L and its radius also increases from R to 1000 R. If the initial surface temperature is T, what approximately is the final surface temperature? A. 0.032 T B. 0.18 T C. 0.0010 T D. 0.010 TAstronomers us the P-Cygni line features in a spectrum of a supernova to... Select one alternative: ...measure the velocity of the supernova ejecta. ...to measure the rotation speed of the star that exploded. ...measure the composition of the supernova ejecta more accurately than with other lines. ...to measure the mass of the neutron star or black hole formed in the supernova.
- Five astronauts (A - E) are watching a star collapse to form a black hole. Which of the flight plans require that the astronaut travel faster than light? A COLLAPSING STAR THAT FORMS BLACK HOLE r=0 Singularity Time Inside of Star At B D Rs Radius of a Star EA. Estimate the surface gravity of a neutron star with R = 10 km and M = 2M. . B. Determine the density of such a neutron star in g/cm³. C. How much would a teaspoon (5 cm³) of this neutron star weigh on Earth? This material is known as neutronium. Give your answer in pounds. D. Which would be heavier: a teaspoon of neutronium weighed on Earth, or a teaspoon of water weighed on the surface of a neutron star?The first confirmed black hole, Cygnus X-1, was regarded as proof that black holes exist because ita. is a compact object in a binary systemb. emits X-rays from a hot accretion diskc. is accreting matter from a main-sequence companion d. has a period of 5.6 dayse. has a mass of ten solar masses
- How does a white dwarf differ from a neutron star? (Select all that apply.) A white dwarf is less massive than a neutron star. A neutron star is denser than a white dwarf .A neutron star is less massive than a white dwarf. A neutron star has a smaller radius than a white dwarf .A white dwarf is denser than a neutron star .A white dwarf has a smaller radius than a neutron star.Which statement concerning black hole masses and Schwarzschild radii is not true? A. Even an object as small as you could become a black hole if there were some way to compress you to a size smaller than your Schwarzschild radius. B. The more massive the black hole, the larger the Schwarzschild radius. C. For black holes produced in massive star supernovae, Schwarzschild radii are typically a few to a few tens of kilometers. D. In a binary system with a black hole, the Schwarzschild radius depends on the distance from the black hole to the companion star.List the following 5 terms in order through a stars life cycle (starting with the sun), through the remainder of its lifetime: a. Black dwarf b. Planetary nebula c. Red giant d. Star (Sun) e. White dwarf