Power Source for Active Galaxies and Quasar1

Power Source for Active Galaxies and Quasar1 - Power Source...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Power Source for Active Galaxies and Quasars So here's the problem: how does nature produce such objects that are luminous over a large range of wavelengths and generate the energy in a very small volume? The number of stars needed to produce the tremendous luminosity could not be packed into the small region and neither would they produce the peculiar non-thermal radiation. One mechanism you have already learned about is the intense radiation produced by hot gas in an accretion disk around a black hole. In order to produce the enormous amount of energy seen in active galaxies and quasars, the black hole must be supermassive. The intense radiation from the disk would drive the gas outward if the black hole did not have enough gravity to keep the gas falling onto the black hole. In order to keep the gas spiralling in and heating up, the mass of the black hole must be hundreds of millions to several billion solar masses. The accretion disk is a few trillion kilometers across (a few light months
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern