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Active Galactic Nuclei. Kayla Young. Knowledge Base: What are AGNs. Compact center of Galaxy More Luminous than galaxy as a whole Major types of AGNs include Radio Galaxies Seyfert Glaxies BL Lac Starburst Quasars are closely related to AGNs. AGNs. Knowledge Base: Structure of AGN.

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Knowledge base what are agns
Knowledge Base: What are AGNs

  • Compact center of Galaxy

  • More Luminous than galaxy as a whole

  • Major types of AGNs include

    • Radio Galaxies

    • SeyfertGlaxies

    • BL Lac

    • Starburst

  • Quasars are closely related to AGNs

Radio galaxies
Radio Galaxies

  • Elliptical Galaxies

  • Radio Emissions

  • Source of long thin jets

Seyfert galaxies
Seyfert Galaxies

  • Spiral Galaxies

  • Visible Light Emissions


  • Most extreme form of galactic nuclei.

  • Less luminous than AGNs.

  • More common billions of years ago.

Starburst galaxies
Starburst Galaxies

  • Doesn’t produce more luminosity than rest of galaxy.

  • Formed by collisions with other galaxies.

  • Star forming regions.

Bl lac object
BL Lac Object

  • Originally considered variable stars

  • Closely related to quasars

  • Blazars


  • Subtype of AGN that jet points to observer

  • Emit large amounts of radio to gamma.

Literature review project techniques
Literature Review: Project Techniques

  • Gorijan et al create Color Magnitude Diagrams of AGN to analyze new data.

  • Johnson et al studied chemical compositions of the winds inside of AGNs

Literature review project ideas
Literature Review: Project Ideas

  • Etchencamp et a in 2006 studied AGNs in Starburst galaxies as well as Radio Galaxies by analyzing spectra.

  • Croton et al simulated lifecycles and growth of AGNs over time using archival data to thoroughly study each object


  • Gorjian, Varoujan, Mark Abajian, Kate Meredith, Helen Petach, Elizabeth Ramseyer, and Tim Spuck. "NITARP Proposal 2010- Color Magnitude Relationships in Nearby Active Galactic Nuclei." (2010). Web.

  • Alexandra JW Echtenkamp. "Radio and Starburst Galaxies." RBSE Journal 2 (2008). Web.

  • Sarah Johnson. "MgII and CIII] in Active Galactic Nuclei." RBSE Journal 2 (2008). Web.

  •  Hester, John Jeffrey. 21st Century Astronomy. New York: W.W. Norton, 2007. 538-41. Print.

  • Dr. Jim Lochner, “Active Galactic Nuclei and Quasars”