Calculate the rate of mass loss through Hawking radiation for Sagittarius A.
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A: The Crab Pulsar is described as a young neutron star. The star is the central star in the Crab…
Q: The fact that gamma-ray bursts are so distant means that they must be very energetic events. (T/F)
A: Gamma rays are the photons with the highest energy ever detected. Gamma-ray bursts or GRBS are…
Q: critical density
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Q: Give examples of baryonic matter.
A: In astronomy baryonic matter are those matter which are made up of protons neutrons and electrons.…
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Q: Since you are made mostly of water, you are very efficient at absorbing microwave photons. If you…
A: Given Since you are made mostly of water, you are very efficient at absorbing microwave photons. (a)…
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Q: Suppose the Hubble constant were not 22 but 12.1 km/s per million light-years. Then what would the…
A: Write the expression for the volume of the sphere. Write the expression for the mass. Here, ρ is…
Q: e la supernova?
A: To trigger a type la supernova one of the two stars must be a white dwarf . The other star is often…
Q: Although visible light cannot escape from a black hole, high- energy radiation, like gamma rays,…
A: Black holes are formed when massive stars collapse under its own gravity. The gravity of a black…
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A: As mass-energy equivalence says that mass and energy are the same, mass can be converted into energy…
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Q: Explain how supernovae produce neutron stars and pulsars.
A: Neutron stars are city size stellar objects with a mass of about 1.4 times that of the Sun.When…
Q: Why do you expect neutron stars to have a powerful magnetic field?
A: Neutron stars are small stellar objects with a mass of about 1.4 solar mass. They are formed when…
Q: The decay constant of Au-198 is 2.97 × 10° s¹. Calculate the ratio of Au-198 remaining after 20…
A: Not all combinations of neutrons and protons are stable. When there are too less or too many…
Q: In a white dwarf, each electron can be considered to be located in a region of size 1.5x10-12 m.…
A: White Dwarf: A small very dense star. A white dwarf is formed when low mass star has exhausted all…
Q: Determine the surface gravity on a neutron star. Assume the star has a mass 50% bigger than the…
A: mass of Sun = 1.98 * 1030 Kg mass of neutron star = mass of sun + 50%mass of sun = 1.5 * 1.98 *…
Q: Contrast the internal structures and properties of neutron stars with white dwarf and main sequence…
A: To explain: 1) Process which balances the inward pull in white dwarf and neutron star 2) Estimating…
Q: Suppose the Hubble constant were not 22 but 53 km/s per million light-years. Then what would the…
A: Given: New Hubble constant, H' = 53 km/s per million light-years
Q: Why do we see most quasars at great distances?
A: In the whole universe Quasar are like those of astronomical object whose luminous comparable to…
Q: Assume that the number density of stars in the Milky Way is 0.14 pc-3. (e) There are 10" stars…
A: Given, Number density of star is, ρ = 0.14 pc-3 Total number of stars in galaxy, N=1011 Let d is the…
Q: What would your mass be if you were composed entirely of neutron star material of density 3 × 1010…
A: Neutron stars are formed when massive stars die due to gravitational collapse. The gravity will fuse…
Q: radio lines of neutral Hydrogen (apart from H91α) What does H91α meaning for?
A: Introduction: The Balmer series is the name given to a series of spectral emission lines of the…
Q: 3C 273 was the first quasar identified (1963). When we look at its chemical spectrum, we see that…
A: Given:- λobs = 759 nm.λ0 = 656 nm
Q: The exponential drop in the brightness of supernova 1987A was due to the decay of 56Ni (t1/2 = 6.1…
A: Given: The reaction of decay is given as, Ni56t1/2=6.1 days→Co56t1/2=77.1 days→Fe56
Q: Assume a flat Friedmann-Robertson-Walker universe. Calculate the redshift z at which the temperature…
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Q: What is the mechanism for the energy output of quasars?
A: Quasars are high luminosity objects in the galaxy, having very high masses (ranging from millions to…
Q: What does the direction of the magnetic field depend on In lectromagnetism?
A: In electromagnetic field the magnetic field is depend on the flow of current.
Q: Why do you expect neutron stars to spin rapidly?
A: Neutron stars are formed when stars with 4 to 8 solar mass die. When such a star runs out of fuel…
Q: The rest wavelength of the Hα transition of atomic hydrogen is 656.3 nm (recall that 1 nm=10-9 m).…
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Q: Newly formed neutron stars have extremely strong magnetic fields. (T/F)
A: Neutron stars are formed when massive stars collapse under their own gravity. The core of such…
Q: Derive 5 equations in UARM.
A: The terms UARM refers to uniformly accelerated rectilinear motion. From the definition of the…
Q: Where do the γ bursts come from?
A: Gamma-ray bursts are one of the top unsolved mysteries in astrophysics, alongside such burning…
Q: What is the surface gravity on the surface of White Dwarf of 1 Solar Mass? What about a Neutron Star…
A: Mass of white dwarf = m =1 solar massRadius of White Dwarf = rWDRadius of Neutron star = rNSRadius…
Q: II. You have been hired as a space weather forecaster. At 11:30:00 UT on your first day, November…
A: The distance from earth to sun is = 149.6 x 106 km
Q: (a) Using Einstein's famous equation for rest-mass energy, E = mc², undergoing nuclear energy that…
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Q: Assume that the umber density of stars in the Milky Way is 0.14 pc-3. There are 10" stars uniformly…
A: Concept: Consider d be the minimum distance of the supernova and the earth to survive in the earth.…
Q: How can we apply the knowledge that was produced by the Large Hadron Collider to our current…
A: There are various elementary particles present and also their antiparticles. We have 4 fundamental…
Q: Describe how Hubble measured distance and velocity.
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Q: Calculate the time it would take for Messier 87 to completely evaporate.
A: A black hole is a point in space-time where the gravitational force is so large that not even light…
Q: Why would a neutron star have such a strong magnetic field?
A: Neutron star is basically consists of about 80% of neutrons, 10% of electrons and 10% of protons.…
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