PPT-Quasars and

Massive Black Holes Stephen Fine Outline What is a quasar How do we study quasar black holes Why do we study quasar black holes What are the current difficulties in studying black holes How can we improve on the current situation. Lesson Objectives. To appreciate that some galaxies emit far more energy at some wavelengths that can be explained simply in terms of ‘starlight’.. To recall the types of active galaxies.. To show an understanding of the mechanism for producing large quantities of radiation from active galaxies.. Redshifts. Gordon Richards. Drexel University. With thanks to. Michael Strauss, . Xiaohui. Fan, Don Schneider, and . Linhua. Jiang. Quasar Luminosity Function. Croom. et al. 2004. Space density of quasars as a function of . Yue . Shen. Carnegie Observatories. In collaboration with Brandon . Kelly (UCSB). M. otivation. T. he abundance (and clustering) of quasars are key to understand the evolution of quasars/SMBHs in the hierarchical structure formation paradigm . With thanks to the members of the Quasar Working Group, particularly Don Schneider, . Xiaohui. Fan, Michael Strauss, Pat Hall, Dan . Vanden. . Berk. , Sebastian Jester, and . Scott Anderson, also Adam Myers. Quasars. Quasars were . discovered by the . radio waves that they give off. Scientists at first had no idea what to these disruptions could possibly be. They still really don’t know.. Because of the initial ambiguity surrounding the Quasars they . Extreme Stars. &. Other Starlike Curiosities. A New View of the Universe. The birth of Radio Astronomy. In 1928, Bell Labs wanted to investigate using "short waves" for transatlantic radio telephone service.   Karl Jansky was assigned the job of investigating the sources of static that might interfere with radio voice transmissions.   . M87. Hercules A radio jets. Active Galactic Nuclei (AGNs) and Supermassive Black Holes. The identification by Maarten Schmidt (1963, . Nature. , 197, 1040) of the radio source 3C 273 as a . “. star. Paul Hewett (. IoA. , Cambridge). James Allen (U. Sydney). Outline. Motivation: . quasar . clustering, . host-galaxy and local quasar environment, relation . to Ly. α. -absorbers and the inter-galactic medium, outflow properties of quasars themselves. http://www.pa.uky.edu. Only 10% of the class has completed the evaluations so far.. I will add 5 points on your final exam if you complete the evaluation.. Today’s model for the formation of the Milky Way and other galaxies. These are called . active. . galaxies. .. . Active Galaxies and Quasars. By looking far away and back in time, astronomers have discovered:. The origin of active galaxy energy sources and outbursts were closely related to the formation and history of galaxies.. Gordon Richards. Drexel University. With thanks to. Michael Strauss, . Yue. . Shen. (Princeton), Don Schneider, Nic Ross (Penn State), Adam . Myers (Illinois. ), Phil Hopkins (. Berkeley. ), . and a host of other people from the SDSS Collaboration. ASKAP. Marcin Glowacki. Supervisors: Elaine Sadler & James Allison. Reddened Quasars. Hopkins et al. (2006). 2. Reddened Quasars. Hopkins et al. (2006). 3. Reddened Quasars. Hopkins et al. (2006). Michael Strauss. 1100 Nights, 20 years. Princeton astronomers have . been involved in APO and ARC from the beginning. . Jim Gunn Jerry . Ostriker. Al . Amy Kimball. NRAO Charlottesville (. NAASC. ). Why is quasar “feedback” important for galaxy formation. . (and what are the two feedback modes)?. How to identify candidate “most extreme feedback” objects.