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: http://www.stsci.edu/~inr/thisweek1/thisweek225.html
Дата изменения: Tue Sep 25 04:34:52 2007 Дата индексирования: Tue Oct 2 14:10:35 2012 Кодировка: Поисковые слова: molecular cloud |
Program Number | Principal Investigator | Program Title | Links |
10599 | Paul Kalas, University of California - Berkeley | Multi-color imaging of two 1 Gyr old debris disks within 20 pc of the Sun: Astrophysical mirrors of our Kuiper Belt | Abstract |
10787 | Jane Charlton, The Pennsylvania State University | Modes of Star Formation and Nuclear Activity in an Early Universe Laboratory | Abstract |
10802 | Adam Riess, Space Telescope Science Institute | SHOES-Supernovae, HO, for the Equation of State of Dark energy | Abstract |
10840 | Nuria Calvet, University of Michigan | The FUV fluxes of Tauri stars in the Taurus molecular cloud | Abstract |
10864 | Carol A. Grady, Eureka Scientific Inc. | Mapping the Gaseous Content of Protoplanetary and Young Planetary Systems with ACS | Abstract |
10872 | Harry Teplitz, California Institute of Technology | Lyman Continuum Emission in Galaxies at z=1.2 | Abstract |
11128 | David Bradley Fisher, University of Texas at Austin | Time Scales Of Bulge Formation In Nearby Galaxies | Abstract |
11133 | Saurabh Jha, Rutgers the State University of New Jersey | Late-Time Photometry of SN 2005hk: A New Kind of Type Ia Supernova | Abstract |
11156 | Kathy Rages, SETI Institute | Monitoring Active Atmospheres on Uranus and Neptune | Abstract |
11169 | Michael E. Brown, California Institute of Technology | Collisions in the Kuiper belt | Abstract |
11175 | Sandra M. Faber, University of California - Santa Cruz | UV Imaging to Determine the Location of Residual Star Formation in Galaxies Recently Arrived on the Red Sequence | Abstract |
11176 | Andrew S. Fruchter, Space Telescope Science Institute | Location and the Origin of Short Gamma-Ray Bursts | Abstract |
11178 | William M. Grundy, Lowell Observatory | Probing Solar System History with Orbits, Masses, and Colors of Transneptunian Binaries | Abstract |
11179 | Patrick Hartigan, Rice University | Dynamics of Clumpy Supersonic Flows in Stellar Jets and in the Laboratory | Abstract |
11190 | Laurence M. Trafton, University of Texas at Austin | Probing Uranus' Vertical Aerosol Structure at Equinox | Abstract |
11201 | Nitya Kallivayalil, Harvard University | Systemic and Internal motions of the Magellanic Clouds: Third Epoch Images | Abstract |
11203 | Kevin Luhman, The Pennsylvania State University | A Search for Circumstellar Disks and Planetary-Mass Companions around Brown Dwarfs in Taurus | Abstract |
11212 | Douglas R. Gies, Georgia State University Research Foundation | Filling the Period Gap for Massive Binaries | Abstract |
11219 | Alessandro Capetti, Osservatorio Astronomico di Torino | Active Galactic Nuclei in nearby galaxies: a new view of the origin of the radio-loud radio-quiet dichotomy? | Abstract |
11229 | Margaret Meixner, Space Telescope Science Institute | SEEDS: The Search for Evolution of Emission from Dust in Supernovae with HST and Spitzer | Abstract |
11292 | Mark R. Showalter, SETI Institute | The Ring Plane Crossings of Uranus in 2007 | Abstract |
11312 | Graham Smith, University of Birmingham | The Local Cluster Substructure Survey (LoCuSS): Deep Strong Lensing Observations with WFPC2 | Abstract |
GO 10872: Lyman Continuum Emission in Galaxies at z=1.2
GO 11178: Probing Solar System History with Orbits, Masses, and Colors of Transneptunian Binaries
Preliminary orbital determination for the KBO WW31, based on C. Veillet's analysis of CFHT observations; the linked image shows the improved orbital derivation, following the addition of HST imaging | The Kuiper Belt consists of icy planetoids that orbit the Sun within a broad band stretching from Neptune's orbit (~30 AU) to distance sof ~50 AU from the Sun (see David Jewitt's Kuiper Belt page for details). Over 500 KBOs (or trans-Neptunian objects, TNOs) are currently known out of a population of perhaps 70,000 objects with diameters exceeding 100 km. Approximately 2% of the known KBOs are binary (including Pluto, one of the largest known KBOs, regardless of whether one considers it a planet or not). This is a surprisingly high fraction, given the difficulties involved in forming such systems and the relative ease with which they can be disrupted. It remains unclear whether these systems formed from single KBOs (through collisions or 3-body interactions) as the Kuiper Belt and the Solar System have evolved, or whether they represent the final tail of an initial (much larger) population of primordial binaries. These issues can be addressed, at least in part, through deriving a better understanding of the composition of KBOs - and those properties can be deduced by measuring the orbital parameters for binary systems. The present proposal will use the Planetary camera on WFPC2 to determine the relative orbits for several known KBO binaries. Just as with binary stars, the orbital period and semi-major axis give the total system mass, while the mid-infrared properties (measured by Spitzer) allow an assessment of the surface area/diameters; combining these measurements gives an estimate of the mean density. |
GO 11201: Systemic and Internal motions of the Magellanic Clouds: Third Epoch Images