What causes X-ray emissions in a binary system of a star and a black hole?
Q: 13) Calculate the luminosity in watts from the absolute magnitude for the given stars: (a) Sun (M =…
A: Luminosity can be defined as an absolute measure of radiated power emitted by a light source over…
Q: The temperature of a blackbody is raised by 1% from 100 K to 101 K. It now gives off _____ times…
A:
Q: If a star has a parallax angle of 0.768" and the width of your pinky is about 1 degree, what…
A: Parallax method is used to find the distances of distant objects. Parallax can be understood with…
Q: What makes a neutrino different than a photon? Why is it that astronomers of the mid-20th century…
A: Interaction: Neutrinos only interact via the weak nuclear force and gravity. On the other side…
Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…
A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
Q: All of the Sun's energy which we calculated as the luminosity (the rate at which energy is radiated…
A: Given: The distance of Earth from the Sun is r=1.49×1013 cm. Introduction: Luminosity is an absolute…
Q: A star is an example of a true blackbody. True False
A: We have to identify if the given statement 'A star is an example of a true blackbody' is true or…
Q: All of the Sun's energy which we calculated as the luminosity (the rate at which energy is radiated…
A: Given: The distance of Earth from the Sun is 1.49×1013 cm. Introduction: Luminosity s a measure of…
Q: What would the wavelength of the 21 cm line be for a source moving away from the Earth at 10% the…
A: As per the Doppler effect, the observed wavelength can be found as, Here, λO, λS, v, and c…
Q: An astronomer measures the light from two objects, A and B, and she finds that they are both black…
A: Given: The wavelength of object A is 2000 nm. The wavelength of object B is 400 nm.
Q: From the HR diagram above, we could determine that the star Barnard's Star has a temperature 3.03E+3…
A: Solution: The luminosity of state is given by the following formula, L=4πR2σT4…
Q: The dust in a molecular cloud has a temperature of about 50 K. At what wavelength does it emit the…
A: A blackbody is an ideal object that absorbs all the radiation that falls on it. The blackbody then…
Q: Using Wien's law, what is the wavelength (in nanometers) of the peak of the spectrum of a star which…
A: Solution:-Given thatSurface Temperature (Ts)=2.9×104 K
Q: and is 10^16m distant from us, what would we measure its brightness to be? If we then moved that…
A:
Q: asked this question already but the answer was wrong and I couldn't follow along with the work so I…
A:
Q: Imagine that you are observing a star and you find the wavelength of peak emission for the star to…
A: required:)wavelength of peak emission for a new star having temperature one third of original star.
Q: Plot the spectral emittance the five bodies in our solar system Listed here: Sun (6000 K) Venus (600…
A: The spectral emittance of a body is given by : Bλ(λ,T)=2hc2λ51ehc/λkT−1Here, h is the planck's…
Q: A piece of iron is heated with a torch to a temperature of 858 K. How much more energy does it emit…
A: The Rate of energy radiated; P=AseT4 so, Energy α T4
Q: Complete the ray diagram age from
A: Given data: The object distance is: u =- 30 cm The focal length is: f =-10 cm The image distance…
Q: The figure below represents the black body curves for two different stars, C and E. Which one would…
A: Answer is as follows
Q: The above spectrum is most plausibly produced by which kind of object? Select one alternative:
A: Required : Correct choice.
Q: If the Sun was producing its energy by slow contraction as suggested by Helmholtz and Kelvin,…
A: The Kelvin–Helmholtz mechanism is the process by which the surface of a star or planet cools which…
Q: At rest hydrogen has a spectral line at 143 nm if this line is observed at 138nm for the star Sirius…
A: Simple problem from special theory of relativity and specifically it's a problem of Doppler's…
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…
Q: If a star has a surface temperature of 20,000 K (2.00 × 104 K), at what wavelength will it radiate…
A: For calculating the wavelength emitted by a hot body consider it as a blackbody. A blackbody is an…
Q: he energy in the Sun currently is provided by a process that combines two hydrogen atoms to form one…
A: Option C is the right answer Nuclear fusion.
Q: 7) The H-alpha line from a star is observed to be 850 nm. Estimate its redshift
A:
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 .
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- Neutral hydrogens are detected with their emission lines of 21cm. What is the energy of a photon in such a line, and in which waveband would this line be observed?1. Spectral signatures can be described using luminosity values in different spectral regions. UV Blue Green Red NIR Forest 28 29 36 27 56 Water 22 23 19 13 8 Corn 53 58 59 60 71 Pasture 40 39 42 32 62 Assuming these signatures are influenced by atmospheric effects: is it possible to separate the different categories based on the values in this table? Which band (s) are the most useful for distinguishing between the different classes in this table and why?Barnard's Star is the 2nd closest star to Sol (~ 6 light years). It is moving toward the Earth with a speed of 110 km/s. Calculate the blue shift of light from Barnard's star, defined by AX/X. OA: OB: OC: OD: OE: -3.668x10-4 -4.586x10-4 -5.732x10-4 -7.165x10-4 OF: OG: -8.956x10-4 -1.120x10-3 -1.399x10-3 OH: -1.749x10-3
- Consider a large interferometer that uses a lazer with the wavelength of 1,073.27 nm (1073.27 x 10-9m). What is the frequency of the photons emitted by this beam in hertz?Go to Question 8 60 Msun I luminosity (solar units) 106 105 104 103 102 10 0.1 10-2 10-3 10-4 10-5 30 Msun 10 Solar Radii Lifetime 10 yrs 1 Solar Radius 0.1 Solar Radius 10-2 Solar Radius 10-3 Solar Radius 30,000 increasing temperature 102 Solar Radi B Centauri Spica 10 Msun Bellatrix MAIN Sirius B Lifetime 108 yrs B Rigel Deneb 6 Msun Achernar SEQUENCE Lifetime 10⁹ yrs WHITE SUPERGIANTS Msun Vega DWARFS Procyon B 103 Solar Radi Sirius Lifetime 1010 yrs A 10,000 Altair Canopus Procyon Sun Arcturus Polaris Lifetime 10¹1 yrs T Ceti 6,000 surface temperature (Kelvin) GIANTS x Centauri A Pollux x Centauri B Eridani F G K Aldebaran Barnard's Star Betelgeuse 61 Cygni A 61 Cygni B Lacaille 9352 0.3 Msun Antares M (It may help you to know that 1 Lsun is 3.8 x 1026 Watts. Use 3.1415 for Pi.) Wolf 359 Proxima Centauri DX Cancri Gliese 725 A Gliese 725 B 0.1 Msun Ross 128 3,000 decreasing temperature The physics of thermally radiating gases relates the luminosity (L), temperature (T) and radius…A star is observed to have a parallax 0.45". Show that it is a distance of 7.2 LY away.