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This Week On The Space Show

Published by Klaus Schmidt on Mon Aug 11, 2014 1:04 am
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The Space Show, hosted by David Livingston at www.TheSpaceShow.com, will have the following guests this week:

1. Monday, August 11, 2014, 2-3:30 PM PDT (21-22:30 GMT)
is the guest to discuss his research about the number of asteroids for possible mining.



Elvis got his PhD under Prof.  Ken Pounds at the University of Leicester (UK) in 1978 for work with the Ariel V satellite. Ariel V was only the 2nd satellite to be devoted to X-ray astronomy. While doing his PhD he discovered the brightest X-ray source ever seen in the sky, apart from the sun. (That sounds easy, but it was a `transient’ source, A0620-00, and was really faint at the time. A0620-00 turns out to be the nearest black hole known to date. ) His  PhD thesis demonstrated that powerful X-ray emission was a normal feature of Active Galactic Nuclei (or “AGN”). AGN X-ray emission has been a lively area of research ever since.  He moved to the USA full time in 1980 to work on the first true X-ray telescope, the  “Einstein Observatory”, at the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, under  Riccardo Giacconi. He worked on many aspects of the Einstein mission, and used the imaging power of Einstein to derive the first  X-ray spectra of quasars, the more powerful cousins of AGN, and to discover extended  X-ray nebulae around nearby AGN, and a peculiar class of galaxy that shows activity only in X-rays (now called ‘XBONGS’). With Andrew Lawrence he proposed in 1982 that much of the confusion in the classification of the AGN “zoo” was due to a flattened obscuring region of dust and gas (Lawrence and Elvis 1982). This was confirmed and extended by the spectacular polarization study of Antonucci and Miller just 3 years later, which is now the basis of the “Unified Scheme” for AGN. This work is still active, because the obscuring torus does not seem like a natural structure. In a recent paper (with A. Lawrence) he suggests that tilted accretion disks could replace the standard ‘donut’ model of obscuration.  With the demise of the Einstein Observatory in 1981 he pursued AGN at all other wavelengths using a wide variety of telescope (IUE, IRAS, IRTF, MMT, VLA, UKIRT, JCMT) leading, among other works, to the 1994 “Atlas of Quasar Energy Distributions”, which has served as a standard since and has been cited almost 1000 times. With the revival of imaging X-ray astronomy on the 1990 launch of ROSAT and then ASCA, he pushed studies of AGN and quasars to high redshifts and extreme properties. Applying the multi-wavelength approach to ROSAT spectra and ultraviolet spectra he, with his colleagues, discovered a hot wind from a number of AGN, peaking in 1995 with a UV/X-ray study of the “Seyfert galaxy” NGC 5548. In 1991 he began to work at the Chandra X-ray Center (CXC), concentrating on the scientific software needs of this revolutionary new observatory (then called AXAF). After 1995 this work prevented him persuing his normal program of observations, and left him to contemplate AGN winds over and over again. The result was a model for the structure of quasars that unites into a simple picture much of the 10,000 papers worth of confusing knowledge about the emission and absorption features in their spectra. This model has survived a number of tests over the past few years, so there may actually be something to it. It has been cited 1000 times. This model of the “Quasar Atmosphere” remains a major focus of his research.  In 2007 he stepped down from his management position at the CXC, in order to promote new missions that can greatly exceed Chandra in their potential for revolutionary discoveries, and to work more with students, one of whom is trying to make his 1994 “Atlas” obsolete. Unable to not chase a good idea, he has also worked on the Warm-Hot Intergalactic Medium, the physics of feedback by AGNs to their host galaxies, and led the Chandra COSMOS wide/deep survey project.  The change of direction for the human space program at NASA – from the Moon to asteroids as the first step towards Mars – seemed to him to offer a strategic potential for cheaper, larger space observatories. He has begun to work on near-Earth asteroids (NEOs) – their detection and their properties – with a view to helping NASA’s exploration forward. Eventually, he is convinced, the commercial potential of the asteroids will transform our space endeavors to a truly large-scale, and will, in the process, make access to space cheap and routine. Dr. Elvis has published over 300 papers in refereed journals and, with over 15,000 citations, is one of the 250 most Highly Cited Researchers in astronomy and space physics, as determined by  ISI.  Highlights
• Discovered that Active Galaxies were strong X-ray sources.
• Proposed first Unified Model for Active Galaxy types using a flattened ‘torus’.
• Atlas of quasar spectral energy distributions became the standard in the field.; Developed the ‘funnel wind’ model of Active Galaxies, unifying their phenomenology.

2. Tuesday, August 12, 2014, 7-8:30 PM PDT (August 13, 2-3:30 GMT)
discussion. All space and STEM topics plus first time callers are welcome.

3. Friday, August 15, 2014, 9:30-11 AM PDT (16:30-18 GMT)
The guest for this program will be announced later in the week
so check back. Dr. Livingston is waiting on replies from those he met at the AIAA conference last week in San Diego. Details will follow as soon as possible.

4. Sunday, August 17, 2014, 12-1:30 PM PDT (19-20:30 GMT)
returns and for the first time, JOE CASSADY of Explore Mars, Inc. visits to discuss new programming and Explore Mars projects.

Chris Carberry
is the Executive Director and co-founder of Explore Mars, Inc., which was created to promote science and technology innovation and education with a use for Mars exploration.   Chris has been actively involved in the space exploration advocacy community for many years. Prior to Explore Mars, Chris served as Executive Director of The Mars Society, an international non-profit space advocacy organization which supports the human exploration and settlement of Mars. While serving as Executive Director, Chris spearheaded the development of The Mars Quarterly, a highly acclaimed international online and print magazine, and provided a business strategy that resulted in two successful international conferences. His innovative ideas resulted in a new presentation platform at the 2008 conference that included a debate between Apollo astronaut, Walter Cunningham (representing the McCain campaign) and Lori Garver (representing the Obama campaign). Through his expertise in building open strategic alliances among industry leaders, Chris successfully broadened the organization’s outreach, and improved donor commitment and sponsor participation in various programs. He previously served the organization as a member of the Steering Committee, for which he organized congressional outreach efforts around the country. Chris previously served as chairman or co-coordinator of such congressional lobbying events as the 2007-2010 Space Budget Blitz, the 2007 Moon-Mars Blitz, the 2006 Space Blitz, and the Great 2006 Mars Blitz.  Chris co-authored space language in the 2000 Republican National Platform, has co-authored Congressional testimony, and has met with high level officials at the White House, NASA, and Congress. During the last several elections, he had the opportunity to speak with most of the major presidential candidates, and more recently, with the Obama NASA transition team in 2009.   Chris also serves as the Chairman of the Steering Committee of the Space Exploration Alliance, which is an umbrella group representing 13 space advocacy organizations with total membership of over 700,000 people.  Chris has been quoted in numerous national and international newspapers and magazines and has appeared on national and international television and radio. He is the author of many articles and Op-Ed pieces concerning space policy and politics. Chris is also the author of a mystery/science fiction novel called Celestial Pursuits: in the hub of the Universe which was published in 2006. He is currently working on several writing projects, including another science fiction novel, a sequel to Celestial Pursuits, as well as a non-fiction book concerning art theft. In addition, in 2007, Chris signed a movie option contract for his novel, Celestial Pursuits, with a Los Angeles production company.  Chris holds a Bachelor’s degree in political science and a Master’s degree in history and archival methods. For several years he worked as an archivist at the Massachusetts Historical Society, where he processed the papers of United States Senator Leverett Saltonstall, as well as numerous other collections. While in this position, he compiled The Guide to Modern Political Papers in Massachusetts, and helped to put together numerous displays. Chris transitioned into the role of Operations Manager at the Historical Society, where he is currently responsible for the protection of numerous art works and the greatest collection of early American documents outside of the Library of Congress.  Chris has an extensive background in historical research, having worked as research assistant for several authors, including British biographer Sarah Bradford (America’s Queen) and former New York Times Magazine editor Ed Klein (The Kennedy Curse). In 2007, Chris was contracted to archive a large collection of political correspondence and documents, and to ghost write the autobiography of a prominent Boston businessman and philanthropist. In addition, Chris has composed pieces of music that have been performed by the Boston Bel Canto Opera in Boston and at the Massachusetts State Awards Ceremony.

Joe Cassady – Executive Director and Deputy for Space Programs, Washington Operations, Aerojet Rocketdyne. Mr. Cassady is the Deputy for Space Programs in the Washington DC Operations for Aerojet Rocketdyne where he helps oversee strategy development and architectures for future space systems. He obtained his BS (1981) and MS (1983) in Aeronautics and Astronautics from Purdue University as well as a Graduate Certificate in Systems Engineering at the George Washington University in 2005.  He has 30+ years experience in propulsion and mission and systems analysis and has authored more than 50 technical papers dealing with electric propulsion, attitude control systems and mission analysis. He has experience working flight projects for both the Air Force and NASA.  Mr. Cassady led flight project teams for the 26 kWe ESEX arcjet system (which still holds the record as the highest power electric propulsion system flown) and the EO-1 Pulsed Plasma Thruster system.  Both systems were accomplished within program cost and schedule constraints and were successful flight demonstrations.  In addition, he has served on a number of advisory groups for NASA and the DoD.  He is an Associate Fellow of the AIAA, is vice-president of the Electric Rocket Propulsion Society and serves on the Board of Directors for ExploreMars.

You can listen to the shows under www.TheSpaceShow.com
Source and copyright by The Space Show.

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