NASA Scientific and Technical Aerospace Reports - The University ...

We find that both MHD modes due to the current and ion diffusion due to kinetic instability caused by the non-Maxwellian
ion distribution contribute to acceleration. We apply our results to extragalactic giant radiolobes, whose synchrotron emissions
serve to calibrate the model, and we discuss extrapolating to other astrophysical structures. Approximate calculations of the
cosmic ray intensity and energy spectrum are in rough agreement with data and serve to motivate more extensive MHD and
kinetic simulations of turbulence that could provide more accurate cosmic ray and synchrotron spectra to be compared with
observations. A distinctive difference from previous models is that the cosmic ray and synchrotron emissions arise from
different parts of the magnetic structure, thus providing a signature for the model.
NTIS
Black Holes (Astronomy); Cosmic Rays; Energy Spectra; Plasma Physics; Plasma Waves
20100017284 Cerro Tololo Inter-American Observatory, La Serena, Chile
Speckle Interferometry at the Blanco and SOAR Telescopes in 2008 and 2009
Tokovinin, Andrei; Mason, Brian D.; Hartkopf, William I.; The Astrophysical Journal; Feb. 2010; Volume 139, pp. 743-756;
In English; Original contains color illustrations
Contract(s)/Grant(s): NNH06AD70I
Report No.(s): AD-A514179; Copyright; Avail.: Other Sources
ONLINE: http://hdl.handle.net/100.2/ADA514179; http://dx.doi.org/10.1088/0004-6256/139/2/743
The results of speckle interferometric measurements of binary and multiple stars conducted in 2008 and 2009 at the
Blanco and Southern Astrophysical Research (SOAR) 4 m telescopes in Chile are presented. A total of 1898 measurements
of 1189 resolved pairs or sub-systems and 394 observations of 285 un-resolved targets are listed. We resolved for the first time
48 new pairs, 21 of which are new sub-systems in close visual multiple stars. Typical internal measurement precision is 0.3
mas in both coordinates, typical companion detection capability is delta m approximately 4.2 at 0.15 degree separation. These
data were obtained with a new electron-multiplication CCD camera; data processing is described in detail, including
estimation of magnitude difference, observational errors, detection limits, and analysis of artifacts. We comment on some
newly discovered pairs and objects of special interest.
Author
Binary Stars; Orbits; Speckle Interferometry; Telescopes; Orbit Calculation; Orbital Mechanics; Orbital Elements; Triple
Stars
20100017295 Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, USA
SIM-PlanetQuest: Progress Report
Marr, James C.; Proceedings SPIE, Space Missions and Technology; May 24, 2006; Volume 6268; 22 pp.; In English;
Original contains color illustrations; Copyright; Avail.: Other Sources
ONLINE: http://hdl.handle.net/2014/41548
SIM-PlanetQuest is a NASA astrophysics mission that is implementing the National Research Counsel’s recommended
Astrometric Interferometry Mission (AIM) to develop the first, in-space, optical, long-baseline Michelson Stellar
Interferometer for performing micro-arcsecond-level astrometry. This level of astrometric precision will enable
characterization of planetary systems around nearby stars and enable a number of key investigations in astrophysics including
calibration of the cosmological distance scale, stellar and galactic structure and evolution, and dark matter/energy distribution.
This paper provides an update on the SIM-PlanetQuest Mission covering the results of the 2005 mission redesign and the
recent completion of the last in a series of technology ‘gates.’ The SIM-PlanetQuest mission redesign was directed by NASA
to recover eroded mass and power margins and to meet specific implementation cost targets. The resulting mission redesign
met all redesign objectives with minimal impact to mission science performance. This paper provides the mission redesign
objectives and describes the resulting mission and system design including changes in science capability. SIM-PlanetQuest
also completed the last of eight major technology development gates that were established in 2001 by NASA, completing the
enabling technology development. The technology development program, the last gate, and its significance to the project’s
flight verification and validation (V&V) approach are briefly described (covered in more detail in a separate paper at this
conference). An update on project programmatic status and plans is also provided.
Author
Michelson Interferometers; Astrophysics; Stellar Structure; Mission Planning; Planetary Systems; Galactic Structure;
Cosmology; Calibrating
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