The fact that gamma-ray bursts are so distant means that they must be very energetic events. (T/F)
Q: Calculate the gravitational redshift of radiation of wavelength 550 nm (the middle of the visible…
A: The gravitational redshift is given by the formula, z=11-2GMc2r-1 where, G is the gravitational…
Q: Taking the distance to the Crab pulsar to be 2000 pc and the bolometric magnitude at maximum…
A: The Crab Pulsar is described as a young neutron star. The star is the central star in the Crab…
Q: Life on Earth wouldn't be possible without supernovae. Why?
A:
Q: to what density must the matter of a 20M☉ star be compressed in order for the star to dissapear…
A: Given Data The mass of the matter is:M=20Mo The mass of the sun is:Mo=1.99×1030 kg To find: The…
Q: What is the answer for sub-item (b in the picture) if the radius of the neutron star is 94.881 km? (
A: Given data : Radius of sun , r = 94.881 Km = 94.881×103 m To find : Find average density of sun if…
Q: The expanding bubble of hot gas shown in the figure, which has been inflated by the light from a…
A:
Q: Why is it possible for repeated nova explosions to occur in the same binary system?
A: A binary star system is one in which two stars are bound to each other through gravity. They will…
Q: In binary star systems where a main-sequence star is transferring mass to a white dwarf star, which…
A: Required : The correct option
Q: What is the heaviest element likely to be produced in fusion processes in stars?
A: iron is the heaviest element stars can make.
Q: A nova is an event, not a stellar object. (True or false)
A: It is True. A nova is a transient astronomical event that causes the sudden appearance of a bright,…
Q: At time t-0 an electron at the origin is subjected to a force that briefly accelerates it in the -z…
A: Given: Acceleration,a=5×1017m/s2Speed of light,c=3×108m/sCoulomb…
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…
Q: when seeing an object at large distance
A: Given as, Eα1at
Q: If the accretion disk around a neutron star has a radius of 8 ✕ 105 km, what is the orbital velocity…
A: Given Data: The radius of the neutron star is r = 8 x 105 km. As we know that the mass of the…
Q: A turbocharged 4-stroke medium speed Diesel engine has a cylinder bore of 200 mm and a stroke of 270…
A: The problem is based on the calculation of brake power and energy consumption of a four-stroke IC…
Q: The highest-velocity stars an astronomer might observe have velocities of about 400 km/s. What…
A: The radial velocity formulae is
Q: What is thought to cause the higher-energy gamma-ray bursts, which do not appear to repeat?
A: Gamma rays are short wavelength electromagnetic spectrum. The gamma-ray photons are the most…
Q: If the expanding layers of a supernova move at a constant velocity of v = 10, 000 %3D km/s and the…
A: Given: velocity of supernova v=104 km/s mass of the supernova M=2.4×1031 kg Ephoton=mc2 Time taken…
Q: Equate the given expressions for pressure to find an expression for the maximum mass of a star. Find…
A:
Q: 2. (a) Find the virial mass of a cluster for which the rms radial velocity dispersion is 5 km/s and…
A: Because of how clusters are prepared, they remain as tiny particles in the course of an experiment…
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: When two stars are in the same star system, they can affect each other’s evolution. Two stars in the…
A: Two stars in the same system might evolve at a different pace, depending on their distances in the…
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: Convert the average mass density in gm/cm-3 of a M = 0.5 Msun R = 0.015 Rsun white dwarf to the…
A: Given that For white dwarf star given that M = 0.5 Msun R = 0.015 Rsun We know that mass of sun…
Q: If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength…
A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…
Q: ▼ Part L A 2.40 kg can of coffee moving at 1.50 m/s in the +x-direction on a kitchen counter…
A: Given values: Coffee can, mc=2.40 kgInitial velocity of the coffee can,uc=1.50 m/si^Mass of the box,…
Q: Vega has Mv = 0.5. How large is Mbol? Calculate the luminosity of Vega. Remember that Mbolo = 4.75.…
A: Given information": The absolute visible magnitude of Vega (Mv) = 0.5 The Spectral class of Vega is…
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: 3000 cm source with luminosity at 13.6 eV of L13.GeV = 2.18 x 109 erg s- at the centre. cloud of…
A: We can estimate the size of the HII region by calculating the stromgren radius Now nH is the cloud…
Q: Calculate the redshift caused by a neutron star with a radius of 11 km and mass of 5.2 x 1030 kg.
A: As per general relativity when a photon leaves a gravitational well its wavelength will increase…
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: A gamma ray burst delivers approximately 5.0 X10-6 joules/m2 to a detector on an orbiting space…
A: A gamma-ray burst delivers approximately 5.0 X10-6 joules/m2 to a detector on an orbiting space…
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: The time it would take for the Sun to consume all its hydrogen (if the Sun's luminosity remained…
A: All-stars like our Sun are powered by nuclear fusion. It is a nuclear reaction in which two lighter…
Q: Type 1a supernovae are not: The result of exceeding the Chandrasehkar limit. Produced…
A: Required :: Type 1a supernovae are not:
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…
A:
Q: If Betelgeuse is a M2 type star, what is the approximate temperature of the star in K?
A: Introduction - It is a supergiant star and the distance of this star from the sun is approximately…
Q: Neutrinos have never been detected experimentally. (T/F)
A: Neutrinos are chargeless particles of very tiny mass which cannot be measured. Since they have very…
Q: Use the small-angle formula to find the linear diameter of a radio source with an angular diameter…
A: Given :- angular diameter of radio source = 0.0024 arc seconds. distance = 2.30 Mpc .
Q: Chart the evolutionary process of a high mass star on the H–R diagram from ZAMS to death.
A: Required to draw: The evolution of high mass stars from Zero Age Main Sequence (ZAMS) to Death: We…
Q: A main sequence star of mass 25 M⊙has a luminosity of approximately 80,000 L⊙. a. At what rate DOES…
A: Given information: The mass of the star (m) = 25M⊙ The luminosity of the star (L) = 80000L⊙ part a):…
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- A gamma ray burst delivers approximately 5.0 X10-6 joules/m2 to a detector on an orbiting space telescope. Assuming that the red shift indicates that the source is 5 X109 light years away (1 yr =3.16X107 seconds) and that the energy at the detector has been corrected for the redshift, what is the energy output of the source in units of 1047 joules and how does it compare to the rest energy of the Sun. The speed of light is 3.0 X 108 m/sec. A year is 3.16 X 107 sec. The mass of the Sun is 2 X 1030 kg. Rest mass energy is E=mc2. The surface area of a sphere is 4ππr2. Group of answer choices 1.9 and 8% 1.41 and 78% 80 and 100% 0.12 and 0.7%What happens on the surface of a neutron star to produce bursts of X rays?A supernova’s energy is often compared to the total energy output of the Sun over its lifetime. Using the Sun’s current luminosity, calculate the total solar energy output, assuming a 1010 year main-sequence lifetime. Using Einstein’s formula E=mc2 calculate the equivalent amount of mass, expressed in Earth masses. [Hint: The total energy output of the Sun over its lifetime is given by its current luminosity times the number of seconds in a year times its ten billion-year lifetime; ; mass of earth = 6×1024kg; c = 3×108m/s. Your answer should be 200-300 Earth masses.]
- if a star is converted every bit of its mass. into energy the conversion efficiency would be 100%. however no star is this efficient in its energy production stars with less than 1.3 solar masses convert hydrogen into helium with an efficiency of only 0.7%. besring in mind that aldebaram has a mass of 2.32*10^30 kg. how long will it live if it converts all of its hydrogen into helium with an efficiency of 0.7%. 1 year = 365.25 days. lifetime= yearsIf neutron stars are hot, why aren't they very luminous?Calculate the redshift of a star if H-ß line of hydrogen from the star is observed to be 800 nm.
- Why is there an upper limit to the mass of neutron stars?Why the Neutron stars do not collapse further?Calculate the gravitational redshift of radiation of wavelength 550 nm that is emitted from a neutron star having a mass of 5.8 x 1030 kg and a radius of 10 km. Assume that the radiation is being detected far from the neutron star.
- What is the escape velocity (in km/s) from the surface of a 1.1 M neutron star? From a 3.0 M neutron star?If a circular accretion disk around a 1.4 M, neutron star has a radius of 1.00 x 105 km as measured from the center of the neutron star to the edge of the disk, what is the orbital velocity (in km/s) of a gas particle located at its outer edge? (The mass of the Sun is GM 1.99 x 1030 kg. Hint: Use the circular orbit velocity formula, V, = ; make sure to express quantities in units of meters, kilograms, and seconds.) km/sHow can a neutron star in a binary system generate X-rays?