Richstone Mitchell

50 %
50 %
Information about Richstone Mitchell

Published on August 29, 2007

Author: CoolDude26


Supermassive Black Holes: The Inverse Dinosaur Problem Douglas RichstoneUniversity of Michigan:  Supermassive Black Holes: The Inverse Dinosaur Problem Douglas Richstone University of Michigan Summary:  Summary The ‘inverse dinosaur problem’. Quasars, observations of test-mass dynamics, interpretation. The current demographic picture M- relation, bh mass spectrum, density, comparison to quasars. Emerging developments – a theory Extension to very low masses spins Possibility of gravitational wave observation of BH mergers. 3c175:  3c175 Mysterious properties of quasistellar objects:  Mysterious properties of quasistellar objects Rapid variability – minutes. Light travel time across inner solar system. Directed energy output (collimated beams of high-energy particles. 'Superluminal' motion. Enormous luminosities ~ 1011 suns. Objects the size of the solar system that outshine the galaxy. Quasars were populous in the youthful universe, but are rare now. Quasars and Black Holes:  Quasars and Black Holes Small size, large luminosity and apparent stability suggest that quasars are gravity powered. Ultimate gravitational engine is a bh. Some fraction of accreted energy is radiated (can greatly exceed thermonuclear energy). BH turns off when fuel is cut off. The decline of Quasars creates the 'inverse dinosaur problem' – where are the relics. Inverse dinosaur problem:  Inverse dinosaur problem The light radiated by quasars is proportional to mc2 of accreted matter. The mass of order m of the accreted matter. The density of quasars mandates a density of bh of about 2 x 105 solar masses/Mpc3. Where are the relics? Slide7:  Slide8:  Circular and parabolic orbits:  Circular and parabolic orbits Slide10:  M84:  M84 Slide12:  Slide13:  Orbit Superposition (Schwarzschild’s method):  Orbit Superposition (Schwarzschild’s method) Assume a mass distribution. Compute the gravitational forces. Follow all the orbits. Sum the orbits to match the observed velocities. Failure rules out the mass distribution. Slide15:  Slide16:  Slide17:  Slide18:  NGC 4258:  NGC 4258 NGC 4258 Maser mass is 3.9 107 at this distance. Slide20:  Results of 15 year effort:  Results of 15 year effort Most bulges have BH (97% so far). BH mass tracks main-body parameters (L, ). Slide22:  Slide23:  Slide24:  Bulge M/L ~ 3x10-3 h Density - 2.5x105 Msun/Mpc-3 for h=.65 (Yu andamp; Tremaine) - 4.8x105h2 Msun/Mpc-3 (Aller andamp; Richstone) consistent results from different datasets. S = 2.2x105 Msun/Mpc3 A note on backgrounds:  A note on backgrounds Any background can be expressed in terms of the cosmic microwave background energy density (about 1eV/cm3). Backgrounds (other than the CMB) can be seen as integrals of source counts. uqso ~ 10-4 bh ~ uqso-1(1 - )(1 - fgw – fejections) Slide26:  Slide27:  Only gas will produce the correct Soltan number:  Only gas will produce the correct Soltan number Accreting matter: Stars Degenerate objects Dark matter Gas Slide29:  Implications:  Implications BH growth spurt during quasar era (is this the epoch of bulge formation?). What is the pedigree of BH and galaxies? Co-Evolution! --- feeding, bar disruption, core scouring, mergers --- bh growh connected to galaxy evolution. Is any of this observable? Slide31:  Thermodynamics of the protogalaxy:  Thermodynamics of the protogalaxy QSO emits Xrays: 0.1*m.c2 in 108yr Galaxy has stars: 0.01*Mc2 in 1010yr QSO light/starlight ~ 103 m./M ~ 1 bh is as important as stars in early phases of galaxy. Slide33:  Slide34:  LISA sky:  LISA sky Slide36:  Grav waves.:  Grav waves.

Add a comment

Related presentations

Related pages

Mitchell Richstone | LinkedIn

Mitchell Richstone. CPA, Principal at Good & Fowler, LLP. Location San Francisco Bay Area Industry Accounting
Read more

Mitchell Richstone | American Institute of Certified ...

View Mitchell Richstone's business profile as Member at American Institute of Certified Public Accountants Inc and see work history, affiliations and more.
Read more

Mitchell Richstone - Tax Professional - Good & Fowler Llp ...

Ask a question of Tax Professional Mitchell Richstone of Good & Fowler Llp in South San Francisco, CA
Read more

Good & Fowler, LLP

mitchell richstone, CPA. Principal . Mitchell has 30 years of CPA experience in taxation. He has a broad range of experience which includes tax planning ...
Read more

Mitchell E Richstone, 61 - San Mateo, CA |®

Mitchell E Richstone, 61 - San Mateo, CA. View in depth free public information, contact info & photos on anyone like San Mateo CA resident Mitchell E ...
Read more

Mitchell Richstone | Whitepages

“10 matches for Mitchell Richstone. Find Mitchell Richstone's phone, address, etc. on Whitepages, the most trusted online directory."
Read more

Mitchell Richstone's Phone & Address | PeopleByName

Mitchell E Richstone 2515 2nd Ct Boynton Beach, FL 33435 Age 62 (Born 1954) (561) 737-2764
Read more

Mitchell Richstone Facebook, Twitter & MySpace on PeekYou

Looking for Mitchell Richstone ? PeekYou's people search has 2 people named Mitchell Richstone and you can find info, photos, links, family members and more
Read more

Massive Black Holes and Their Host Galaxies

Title: Massive Black Holes and Their Host Galaxies Author: D. Richstone Last modified by: LSA User Created Date: 6/25/2000 9:38:17 PM Document presentation ...
Read more

Top 25 Richstone profiles | LinkedIn

There are 48 professionals named Richstone, who use LinkedIn to exchange information, ideas, and opportunities. LinkedIn Home What is LinkedIn? Join Today
Read more