05
August
2010
|
18:00 PM
America/New_York

Columbus mayor will address summer graduates

The panel illustrates the complexity of dynamical evolution in a typical collision between two equal-mass disk galaxies. The simulation follows dark matter, stars, gas, and supermassive black holes, but only the gas component is visualized. Brighter colors indicate regions of higher gas density and the time corresponding to each snapshot is given by the labels. The first 10 panel images measure 100 kpc on a side, roughly five times the diameter of the visible part of the Milky Way galaxy. The next five panels represent successive zooms on the central region. The final frame shows the inner 300 pc of the nuclear region at the end of the simulation. On two accompanying videos -- here and here -- during the interaction, violent tidal forces tear the galactic disks apart, generating spectacular tidal tails, plumes and prominent bridges of material connecting the two galaxies. The ultimate outcome of a series of increasingly close encounters is the inevitable merger of the disk galaxies into a single structure and the formation of a nuclear disk as shown in the last panel. The simulated nuclear disks have masses of approximately a billion solar masses and exhibit prominent non-axisymmetric features known to produce strong gas inflows. The gas inflows are likely responsible for fueling the central black hole, but even higher resolution will be needed to study this process in detail. Nevertheless, the simulations carried out by Kazantzidis and his collaborators provide the first direct evidence that gas originally in galaxies separated by hundreds of kiloparsecs is collected to sub-parsec scales simply as a result of the dynamics and hydrodynamics involved in the merger process.
The panel illustrates the complexity of dynamical evolution in a typical collision between two equal-mass disk galaxies. The simulation follows dark matter, stars, gas, and supermassive black holes, but only the gas component is visualized. Brighter colors indicate regions of higher gas density and the time corresponding to each snapshot is given by the labels. The first 10 panel images measure 100 kpc on a side, roughly five times the diameter of the visible part of the Milky Way galaxy. The next five panels represent successive zooms on the central region. The final frame shows the inner 300 pc of the nuclear region at the end of the simulation. On two accompanying videos -- here and here -- during the interaction, violent tidal forces tear the galactic disks apart, generating spectacular tidal tails, plumes and prominent bridges of material connecting the two galaxies. The ultimate outcome of a series of increasingly close encounters is the inevitable merger of the disk galaxies into a single structure and the formation of a nuclear disk as shown in the last panel. The simulated nuclear disks have masses of approximately a billion solar masses and exhibit prominent non-axisymmetric features known to produce strong gas inflows. The gas inflows are likely responsible for fueling the central black hole, but even higher resolution will be needed to study this process in detail. Nevertheless, the simulations carried out by Kazantzidis and his collaborators provide the first direct evidence that gas originally in galaxies separated by hundreds of kiloparsecs is collected to sub-parsec scales simply as a result of the dynamics and hydrodynamics involved in the merger process.
The panel illustrates the complexity of dynamical evolution in a typical collision between two equal-mass disk galaxies. The simulation follows dark matter, stars, gas, and supermassive black holes, but only the gas component is visualized. Brighter colors indicate regions of higher gas density and the time corresponding to each snapshot is given by the labels. The first 10 panel images measure 100 kpc on a side, roughly five times the diameter of the visible part of the Milky Way galaxy. The next five panels represent successive zooms on the central region. The final frame shows the inner 300 pc of the nuclear region at the end of the simulation. On two accompanying videos -- here and here -- during the interaction, violent tidal forces tear the galactic disks apart, generating spectacular tidal tails, plumes and prominent bridges of material connecting the two galaxies. The ultimate outcome of a series of increasingly close encounters is the inevitable merger of the disk galaxies into a single structure and the formation of a nuclear disk as shown in the last panel. The simulated nuclear disks have masses of approximately a billion solar masses and exhibit prominent non-axisymmetric features known to produce strong gas inflows. The gas inflows are likely responsible for fueling the central black hole, but even higher resolution will be needed to study this process in detail. Nevertheless, the simulations carried out by Kazantzidis and his collaborators provide the first direct evidence that gas originally in galaxies separated by hundreds of kiloparsecs is collected to sub-parsec scales simply as a result of the dynamics and hydrodynamics involved in the merger process.

Columbus Mayor Michael B. Coleman will speak at Ohio State’s summer quarter commencement, which begins at 1 p.m. on Sunday, August 29, at the Jerome Schottenstein Center. About 1,800 students will receive degrees during the ceremony.

Coleman, who is serving his third term as mayor of Columbus, earned an undergraduate degree in political science from the University of Cincinnati and a law degree from the University of Dayton in 1980.

Since taking office in 2000, his focus has been to improve the quality of life for families in Columbus neighborhoods and to create jobs by continuing to improve Columbus’ high quality of life.

The City of Columbus and The Ohio State University have joined forces on a number of projects over the last ten years to improve safety and services in the University District – the city neighborhood closest to campus where thousands of students live. Those include the Moody/Hall Neighborhood Policing Center; 150 new streetlights; the Joint Patrol Project, where an Ohio State University Police officer works in tandem with a Columbus Police officer to patrol the University District and campus; and university assistance in funding refuse collection in the University District.

He has leveraged incentives to create and retain more than 65,000 jobs and bring more than $4.5 billion in private investment to Columbus throughout his tenure. Businesses have access to an educated workforce including graduates from The Ohio State University and 17 other regional colleges and universities. Columbus is centrally located to national markets and a growing transportation, distribution and logistics hub.

Columbus is the 16th largest city in the country. Under Mayor Coleman’s leadership, the city has been recognized and ranked among the best in the nation. RelocateAmerica calls Columbus one of the 10 best large cites and one of the 10 most affordable metro areas. It was recognized as the nation’s 8th best place to live by CNN and Money magazine, which also declared Columbus as the nation’s safest big city. Forbes Magazine has recognized Columbus as the top up-and-coming tech city and the top city in which to retire. Columbus regularly makes top rankings as a hot destination for relocation of businesses: In December of 2008 it was ranked as the 7th best metro area for business by WSJ MarketWatch; in June 2008 it was ranked the 7th best city for high-impact companies by the U.S. Small Business Administration; it was ranked as the 3rd “Big City of the Future” by fDi Magazine and the 4th “most business friendly.” In addition, Columbus continues to earn top rankings for its stable housing market, affordability, and as a top city for African-Americans, young professionals, and members of the GLBT community.

Mayor Coleman’s complete biography is available here: http://mayor.columbus.gov/biography.aspx?id=1456&menu_id=442