+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > Jackson, A. A.  NASA Center > NASA (non Center Specific)  Publication Year > 2001-2010 > 2001  Subject > A-C > Astrophysics  Availability Options > Order From Other Sources  Item/Media Type > Reprint  Item/Media Type > NASA Report > Technical Memorandum (TM)  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: The Capture of Interstellar Dust: The Pure Poynting-Robertson Case Author(s): Jackson, A. A. Abstract: Ulysses and Galileo spacecraft have discovered interstellar dust particles entering the solar system. In general, particles trajectories not altered by Lorentz forces or radiation pressure should encounter the sun on open orbits. Under Newtonian forces alone these particles return to the interstellar medium. Dissipative forces, such as Poynting Robertson (PR) and corpuscular drag and non-dissipative Lorentz forces can modify open orbits to become closed. In particular, it is possible for the orbits of particles that pass close to the Sun to become closed due to PR drag. Further, solar irradiation will cause modification of the size of the dust particle by evaporation. The combination of these processes gives rise a class of capture orbits and bound orbits with evaporation. Considering only the case of pure PR drag a minimum impact parameter is derived for initial capture by Poynting-Robertson drag. Orbits in the solar radiation field are computed numerically accounting for evaporation with optical and material properties for ideal interstellar particles modeled. The properties of this kind of particle capture are discussed for the Sun but is applicable to other stars. NASA Center: NASA (non Center Specific) Publication Date: [2001] Document Source: Other Sources No Digital Version Available: Go to Tips On Ordering Document ID: 20020021644 Publication Information: Planetary and Space Science, Volume 49, 417-424, ISSN 0032-0633, Number of Pages = 8 Report Number: LPI-Contrib-1064 Contract-Grant-Task Number: NASW-4574 Keywords: COSMIC DUST; POYNTING-ROBERTSON EFFECT; TRAJECTORIES; EVAPORATION; SOLAR RADIATION; DRAG; LORENTZ FORCE; SUN; COMPUTERIZED SIMULATION; Accessibility: Unclassified; Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2004-11-03 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007