Calculate the size to which the Sun should shrink to become a blackhole.
Q: How does the lighthouse model explain pulsars? in two sentences.
A: Pulsars are spinning neutron stars that emit beams of radiation from their magnetic poles
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A: Black holes are regions of high gravity in spacetime. Once a black hole is formed it will start…
Q: The expanding bubble of hot gas shown in the figure, which has been inflated by the light from a…
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Q: person weigh on the surface of this star?
A: Mass of sun, m Mass of star, M=1.8×m Radius of Sun, r Radius of star, R=0.06×r Given, weight of a…
Q: What is the densest substance in the universe?
A: Osmium is the densest thing in the universe.
Q: Is there a way to quantify Dark Matter?
A: Required : Is there a way to quantify Dark Matter ?
Q: Is the event horizon of a black hole the actual physical surface of the object?
A:
Q: Galaxy B moves away from galaxy A at 0.519 times the speed of light. Galaxy C moves away from galaxy…
A:
Q: If the inner accretion disk around a black hole has a temperature of 1,000,000 K, at what wavelength…
A: Black holes are regions of large gravitational force in spacetime. The gravitational force is so…
Q: Is there a way to quantify Dark Matter?
A: Required : Is there a way to quantify Dark Matter.
Q: Why haven't we detected any Primordial black holes?
A: Primordial black holes or PBH are black holes that formed soon after the birth of the universe. The…
Q: How does a gravitational red-shift differ from a Doppler red shift?
A:
Q: Calculate the surface temperature of the star Betelgeuse whose λmax is 850 nm
A: Wien's Law of Blackbody Radiation λmaxT = a constant = 3 × 106 where λmax = wavelength of radiation…
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A: As per the Doppler effect, the observed wavelength can be found as, Here, λO, λS, v, and c…
Q: Calculate the Eddington limit for star of 10³0 Msun.
A: In a star, the radiation pressure is constantly pushing away matter while gravity is pulling it in.…
Q: Consider hot Jupiter with a temperature of 3138 K orbiting the star Vega at what wavelength in nm…
A: given- Temperature of jupiter =3138 K
Q: What exactly is dark matter?
A: Particles that do not absorb, reflect, or emit light, hence cannot be detected by electromagnetic…
Q: The longest wavelength of light humans can see is around 750 nm, deep red. If we were to observe a…
A: For light coming near a black hole, the light gets red shifted due to gravity. The observed…
Q: What characteristics must a binary star have to be a good candidate for a black hole? Why is each of…
A: The characteristic must a binary star posses for it to be a good candidate for black hole is, From…
Q: Galaxy B moves away from galaxy A at 0.541 times the speed of light. Galaxy C moves away from galaxy…
A: We have to use special theory of relativity to solve this problem
Q: Find the wavelength of peak intensity for a hot 45000 K star that emits thermal radiation.
A: Given information:Temperature of the object (T) = 45000 K
Q: an introduction on what are black holes and how they are formed?
A: As per the we have to give introduction on what are Black holes and their formation.
Q: Suppose the temperature of a blackbody increases by 20%. What will happen to the total rate at which…
A: Energy radiated by a blackbody depends on its temperature and the relationship between temperature…
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- What’s the history behind gravitational waves?Astronomers are studying the supermassive black hole (SMBH) of an AGN with a mass of 108 Mo. The SMBH is located in an elliptical galaxy at a redshift of z = 0.05 and with a velocity dispersion of 300 km/s. a.) What is the maximum AGN- luminosity in units of the host galaxy luminosity? What apparent emitting temperature would the AGN have?A Doppler redshift in light from a star indicates that the star is_____.
- The redshift measurements of spectra from magnesium and iron are important in understanding distant galaxies. What are the Kα and Lα wavelengths for magnesium and iron?Integrate the first equation over all wavelengths to find an expression for the total luminosity of a black body star. (See the second equation for a hint)With the concepts of relativity, answer the following and show the detailed soln: