The first gravity wave was detected by LIGO in Sept 2015. What caused this gravity wave? Group of answer choices A large truck drove by. Two neutron stars merged. Two black holes merged. A star exploded in a supernova.
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- 7. Let's characterize a typical neutron star. (a) Compute its luminosity in units of the solar luminosity. Consider that the neutron star has a surface effective temperature of 106 K and a radius of 7 km. (b) In which wavelength does the neutron star radiate most energy (in nm)? (c) In which region of the spectrum it will be easier to detect / observe such an object (look at Figure 2)? mmmmmm 0.0001 nm 0.01 nm Gamma rays 400 nm Increasing energy X-rays Increasing wavelength 10 nm 1000 nm 0.01 cm Ultra- violet Infrared Visible light 500 nm 600 nm Figure 2: Electromagnetic spectrum 1 cm 1m Radio waves Radar TV FM 700 nm 100 m AMMatch each characteristic below to the appropriate stellar end state. (Select W-White dwarf, N-Neutron star, B-Black hole. If the first is W and the rest N, enter WNNNNNNN). A) Size defined by its Schwarzschild radius. B) Typically about the size of Earth. C) Usually has a very strong magnetic field. D) In a binary system it can explode as a supernova. E) Supported by electron degeneracy pressure. F) Sometimes appears as a pulsar. G) Viewed from afar, time stops at its event horizon. H) Has a mass no greater than 1.4 solar-masses.Pls help ASAP. Pls show all work.
- Question 12 Nuclear fusion is a process which releases large amounts of energy and takes place in the core of stars like our Sun. Explain what is meant by nuclear fusion and the conditions necessary for it to take place. [about 150 words TUTARIA xecfureter pitztenen fargeping tontien SEAGA tallerkitty KAMIRIKIA Tantaastattes Forterrebenta Tank-Taric Hartafferies Whyteuffer ENDRERITAT ESFISSTEHALE SUSECTIONE STMENTEEL itaftarly RICERCAGE evements teleidens RISTISTATASTE athleschicht JEZERSITE GAMBAR 4315742424 Satelit Stimale Ras MUJERESES Sosyesyevelse 284 SHITA BRAWLIBETTEREM Intermit GIGIRIGEN EN ANDJESTHE LAE THUIZEMIE BURE POTESISIHAE JITHASELThe 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(Astronomy) PSR1913+16 Problem II. Using only the Figure, what are the maximum radial velocities as found from the redshift and blueshift, respectively? Note: redshifts have positive radial velocities values in the figure, whereas blueshifts have negative radial velocity values. (Answer in km/s)
- The Local Bubble is: a. a region of low density intersteller gas extending several hundred LY around the Sun b. a region around any exploding star where material is expanding from the explosion c. the region around very hot stars where hydrogen is ionized1: Briefly explain what are neutron stars and then estimate the escape velocity of a neutron star.Match each characteristic below to the appropriate stellar end state. (Select W-White dwarf, N-Neutron star, B-Black hole. If the first is W and the rest N, enter WNNNNNNN). A) Has a mass no greater than 1.4 solar-masses. B) Sometimes appears as a pulsar. C) Size defined by its Schwarzschild radius. D) In a binary system it can explode as a supernova. E) Supported by electron degeneracy pressure. F) Typically about the size of Earth. G) Usually has a very strong magnetic field. H) Viewed from afar, time stops at its event horizon. Answer: Submit All Answers
- (Astronomy) Neutron Star Escape Velocity. What is the escape velocity at the surface of a 2.80-solar-mass neutron star that has a typical radius for this type of star? Express your answer in units of km/s.Which of the following most correctly explains why we have not yet observed any white dwarfs derived from M stars: Group of answer choices Most M stars end up as neutron stars or black holes. The lifetime of M stars is longer than the age of the universe. Most M stars are located near the edge of the universe, beyond the visible horizon. Most M stars are members of a binary system, and the white dwarf would be obscured by the glare of the more massive companion. White dwarfs are too dim to be observed with currently available techniques.Which of the following is the most reasonable statement regarding a neutron star? Group of answer choices It consists mostly or entirely of neutrinos. The most common component of a neutron star is hydrogen. The star will turn into white dwarf. All its electrons have been combined with protons. It consists of neutrons and protons floating in a sea of electrons.