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Can someone carefully answer questions A, B, C

and D in detail, please!!

Using Rayleigh-Jeans law and Wein's law will help!

Thank you!!


(1) Among the luminous X-ray sources in the Milky Way are a class of objects know as "X-ray
bursters." By various reasoning that we'll talk about in a few weeks, we conclude that many of
these "X-ray bursters" are about 10 kpc away. During an X-ray burst, the X-ray luminosity of
these objects increases to a value of about Lx = 2 x 1058 erg/sec, and the X-ray spectrum looks
like the schematic shown below.
V = 1. 8X10 Hz
( flux in
arbitrary units )
a. From the observed X-ray data spectrum, the X-ray photon emission mechanism is plausibly
inferred to be blackbody emission from hot gas. Explain how one might arrive at this conclusion
about which radiation emission mechanism is at work, by examining the supplied X-ray spectrum
b. Very simply estimate the temperature of this X-ray emitting gas, assuming that it's blackbody
radiation. Be sure to show your work and/or explain your reasoning.
c. From simple blackbody arguments, estimate the radius of such an X-ray burster.
Then, using your result on the dimensions of this X-ray burster, speculate (just one sentence will
suffice!) on what type of star might be present in "X-ray bursters". (Recall that a typical white
dwarf radius might be ~5000 km, a typical normal star in the Galaxy is more-or-less like the Sun
and therefore has a radius of about ~ 10 km, a neutron star has a radius of ~ 10 km, etc.).
d. Estimate the X-ray flux expected to be observed from such an "X-ray burster" at the Earth
(above the Earth's atmosphere of course).
Finally, very simply convert this energy flux (which might be in units of erg/s/cm?), into a rough
estimate of the X-ray photon flux, i.e., the number of X-ray photons/sec/cm that might be expected
to reach a detector at the Earth (again above the Earth's atmosphere).

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