If a quasar is 2,000 times more luminous than an entire galaxy, what is the absolute magnitude of such a quasar? Note: The absolute magnitude of the Milky Way Galaxy is about −21. Hint: Use the formula for magnitudes and flux ratios,
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If a quasar is 2,000 times more luminous than an entire galaxy, what is the absolute magnitude of such a quasar?
Note: The absolute magnitude of the Milky Way Galaxy is about −21. Hint: Use the formula for magnitudes and flux ratios,
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- In the reading, you were told that there were roughly 10,000 galaxies in the image of the Hubble Ultra Deep Field alone. The image is roughly 10 square arcminutes and there are roughly 1.5*10^8 square arcminutes composing the entire sky. With that in mind and assuming that the Hubble Ultra Deep Field represents an average part of the sky, roughly how many galaxies may exist in the observable universe? (Please include commas for every factor of 1,000; for example 2,343,567,890)Looking for ___ hrGiven an image of a disk galaxy, you have measured that the average surface brightness at two radii (R = R1 and R = R2) are I1 and I2 respectively. The disk surface brightness profile has the exponential form of I(R) = I0 e(-R/Rd). What are the values of I0 and Rd for this disk?
- If a galaxy contains a supernova that at its brightest has an apparent magnitude of +25, how far away is the galaxy? Assume that the absolute magnitude of the supernova is -14. (Hint: use the magnitude - distance formula : d = 10 (Mv-Mv +5)/5 _______ MpcIf a galaxy has an apparent radial velocity of 2000 km/s and the Hubble constant is 70 km/s/Mpc, how far away is the galaxy?Please solve page 3 and 4 using the table below NGC NO. Galactic Longitude (deg) Galactic Latitude (deg) Distance from Sun (kpc) Distance (polar view) (kpc) NGC NO. Galactic Longitude (deg) Galactic Latitude (deg) Distance from Sun (kpc) Distance (polar view) (kpc) 1904 227 -30 13 1 1 6402 21 15 9 9 4590 300 36 10 8 6626 8 -6 6 6 5024 333 80 18 3 6637 2 -10 9 9 5272 42 79 10 2 6656 10 -8 3 3 5904 4 47 7 5 6681 3 -12 9 39 6093 353 20 10 9 6356 7 10 15 15 6121 351 16 2 2 6284 358 10 15 15 6171 3 23 6 5 6838 57 -5 4 4 6205 59 41 8 6 6864 20 -26 21 19 6218 16 26 5 5 6981 35 -33 17 14 6254 15 23 4 4 7078 65 -27 10 9 6266 354 7 7 7 7089 53 -36 12 10 6273 357 9 9 9 7099 27 -47 8 5…
- If a quasar is 1,640 times more luminous than an entire galaxy, what is the absolute magnitude of such a quasar? (Note: The absolute magnitude of the Milky Wag Galaxy is about -21. Use the formula for magnitude and flux ratio, Mv - Ma = 2.5log(Fa\Fb)).Figure 2 shows the "rotation curve" of NGC 2742. It plots the “radial velocity (V)" (how fast material is moving either toward or away from us) that is measured for objects at different distances (R = radius") from the center of the galaxy. The center of the galaxy is at 0 kpc (kiloparsecs) with a speed of 9 km/sec away from us. (These velocities have been corrected for the observed tilt of the galaxy and represent true orbital velocities of the stars and gas.) 200 100 U4779 -100 As you can see, one side of the galaxy is moving with a negative velocity (spinning toward us), while the other side has a positive velocity (spinning away from us). Using Newton's gravity equation, we will be able to determine the gravitational mass of the entire galaxy and how the mass varies versus distance from the galaxy's center. -200 -8 8 -4 Radius (kpc) Read the following text carefully and follow the instructions: Select five radii spaced evenly from 0-10 kpc across the galaxy. Your selections should…If Hubble’s constant is taken to be 70 ??? ???, and a quasar is found to have a radial velocity equal to 95% of the speed of light, how far is the quasar in Mpc? (Hint: Use Hubble’s Law and solve for the distance; and the speed of light in vacuum is: ?=3.0×105 ??/?).