Presentation on theme: "Quasar Host Galaxies: Growing up with Monstrous Middles Kim K. McLeod, Wellesley College George Rieke, U. of Arizona Lisa Storrie-Lombardi, IPAC Brian."— Presentation transcript:
Quasar Host Galaxies: Growing up with Monstrous Middles Kim K. McLeod, Wellesley College George Rieke, U. of Arizona Lisa Storrie-Lombardi, IPAC Brian McLeod, CfA Jill Bechtold, U. of Arizona McLeod/Scientific American
Hosts, in the style of Astro101 (“’Scopes for dopes?”) 1984: “In a few quasars, we can actually observe the underlying galaxies in which they are embedded…” (Abell, Realm of the Universe) 1994: “It is very difficult to observe the ‘host galaxy’” Radio quiet = spiral; Radio loud = elliptical (Kaufmann, Universe) 2004: “Quasars turn out to be located in the centers of galaxies (!)…both spiral and elliptical…many involved in a collision.” (Fraknoi, Morrison, & Wolff, Voyages)
Why can’t grown astronomers tell a spiral from an elliptical? (even our C students can do this…) Argument by Analogy
Galaxy Gallery Spirals Elliptical Merger and ULIRG STScI Wellesley students Why we care (deeply!) We have met the enemy…
Hosts on the eve of HST Our program: --256x256 IR camera --image 50 z<0.4 quasars and 50 Seyferts Simultaneous with similar study by Dunlop et al.: --nicely matched samples of RLQ, RQQ, and RG --later got WFPC2 data
IR images from ground Quasars (what kind of galaxies ARE they???) Seyferts (obviously spirals, and some perfectly normal) K. McLeod/PASP
Radial profiles …my favorite way to spend the day! Three evil letters: P oint S pread F unction
Survey says: “Beefy black holes require beefy galaxies!” McLeod & Rieke 1995
“Which of these things is not like the other?” K. McLeod/Sky&Telescope with thanks to John Bahcall WFPC2 on patrol!
Martini, Regan, Mulchaey, & Pogge 2003 “A Moon a minute”— P. Martini HST and Seyferts: feeding the monster
Astro101 Revisited 2014: “In 2009, HST observations of large samples of hosts (from SDSS samples?) fuzz around z=4 quasars lensed quasars at high z elemental abundances in high-z quasars the nuclei of dwarf galaxies …(insert your favorites here)… showed how stars and black holes grow together starting from a seed masses of _______ inside dark matter halos to make the galaxies we see today.” H S T o o !