Calculate the Eddington limit for star of 10³0 Msun.
Q: Many of the bright stars in the night sky are highly luminous normal blue stars (such as Acrux), and…
A:
Q: A red giant star might have radius = 104 times the solar radius, and luminosity = 1730 times solar…
A: This problem can be solved using Stefan-Boltzmann law of Black body radiation.
Q: The Hα spectral line has a rest wavelength of 6562.8 ˚A (remember: 1 ˚A = 10−10 m). In star A, the…
A: Given: The wavelength of the Hα=6562.8 Ao. The wavelength of Hα spectral of star A is 6568.4 Ao. The…
Q: The Stelan Bomann equation can be used to estimate the size of asteroids. "Sigma," the…
A: In case of a Black body radiation, Stefan-Boltzmann's law relates the radiant emittance of the black…
Q: The expanding bubble of hot gas shown in the figure, which has been inflated by the light from a…
A:
Q: Which spectral line does this likely correspond to?
A: we can use the doppler shift formula to find laboratory wavelength.
Q: 2.
A:
Q: Find the wavelength of peak intensity for a hot 45000 K star that emits thermal radiation.
A: Given that:Temperature of the hot star : (T) =45000 K Now, From Wien’s displacement Law…
Q: If the main-sequence mass lower limit is 0.08 solar mass and the brightest main-sequence stars are 1…
A: The Main Sequence Stars are a mass sequence, with low mass stars forming an equilibrium with a cool…
Q: Calculate the size to which the Sun should shrink to become a blackhole.
A: The limit to which an object can shrink without undergoing gravitational collapse is called…
Q: To find the Sun’s luminosity from its brightness using the inverse-square law, you also had to be…
A: The distance to the sun can be calculated using the method of parallax. Parallax is defined as the…
Q: A supernova occurs 140,000 light years from Earth, where a neutron star of mass 1.6 solar masses and…
A:
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: 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: At rest, hydrogen has a spectral line at 144 nm. If this line is observed at 168 nm for the star…
A: Given that Hydrogen has a spectral line at λ= 144 nm =10-9m This line is observed at λ'= 168 nm=10-9…
Q: Consider two stars, A and B, of equal size. You take a spectrum of each star and find that the flux…
A:
Q: What is the distance in parsec to pulsar 0628-28 using 400 and 600 MHz frequencies? The dispersion…
A: GIven for pulsar 0628-28, dispersion measure DM is 124.5We have to determine distance in parsec to…
Q: An O8 V star has an apparent magnitude of +2. Use the method of spectroscopic parallax to estimate…
A: The apparent magnitude m of the star is given to be m=+1. From HR absolute magnitude M of a star…
Q: Using the proportionality relationships for stellar luminosity as a function of mass and stellar…
A: Stellar lifetime is directly proportional to Stellar mass. Stellar luminosity is inversely…
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…
Q: If the Sun is well approximated by a black body with a temperature of 6,000◦ K, then how does its…
A: By using Stefan Boltzmann's Law
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: If the surface Temperature of a star was about 11000.0 K instead of 7000.0 K what is the ratio of…
A: Given , temperature of the star is 11000 K instead of 7000 K How many times greater is the magnitude…
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: Explain how some stars form in binary systems.
A: There are number of ways stars can be formed in binary systems. They are discussed below.
Q: The present-day density of the sun is about 1.4 g/cm3. The volume of a sphere is 4/3πr3. The density…
A: Given:ρsun=1.4g/cm3ρstar=ρsunxRsunRstar3volume of sphere =4/3πr3to find:ρsun when Rsun=50 times…
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: Calculate the surface temperature of the star (in K), if the radius of the star is 9,7x10 m and the…
A: Given values: Radius of the star, R=97×108 mMass lost by the star per second, m=54×1010 kg
Q: Many of the bright stars in the night sky are highly luminous normal blue stars (such as Acrux), and…
A: Given: The distance between the bright star and the earth is r = 620 light years The luminosity of…
Q: Distances to the nearest stars (up to 500 ly away) can be measured by a technique called parallax,…
A: The distance between the Sun and the Star is given as, dS = 4 light year (or) dS = 3.784×1013 km TO…
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: If a T Tauri star is the same temperature as the sun but is ten times more luminous, what is its…
A: The energy radiated by a star per second is known as its luminosity and is directly proportional to…
Q: The star G1710 is currently at a distance of 62 lightyears and has an apparent visual magnitude of…
A:
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: Consider the following question: How many times bigger than the sun would a cool star (4000K) have…
A:
Q: The flux received at the Earth from Supernova 1885 was 3.0182 x 10 10 W/m?. The luminosity of the…
A: flux (I) = 3.0182×10-10 Wm2luminosity = 6×109 solar luminosities
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: If a star has M = 100Msun and L = 10^6Lsun, how long can it shine at that luminosity if it started…
A: Given: M=100Msun, L=106Lsun Let us find the number of hydrogen atoms present in the star…
Q: A star has a measured radial velocity of 300 km/s. If you measure the wavelength of a particular…
A:
Q: Explain what type of ‘mass spectra’ is generated in GC-MS.
A: There are different types of mass spectra present in the experimental procedures for finding traces…
Q: For the PP chain 0.7% of the mass participating in nuclear fusion is liberated as energy which…
A:
Q: Solar constant, Sun, and the 10 pc distance! The luminosity of Sun is 4-- 1026 w - 4-- 1033ergs- 1,…
A: Given: Luminosity or energy radiated by sun, E = 4×1026 W Distance of the Sun from the Earth, rES =…
Step by step
Solved in 3 steps
