tailieunhanh - The Hands-on Guide for Science Communicators - L. Christensen (Springer 2007) Episode 5

Tham khảo tài liệu 'the hands-on guide for science communicators - l. christensen (springer 2007) episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | PRESS RELEASES Sky Telescope NRAO 2. The press release from NRAO 3. The news article on Sky Telescope s website A Tossed-Out Brown Dwarf January 9 2003 I Astronomers may be witnessing the ejection of a very young starlike body out of a triple-star system. Dubbed T Tauri South T Tau S the system consists of a very tight binary Sa and a lower-mass companion Sb . The trio is slowly orbiting T Tau North the famous star that lends its name to a whole class of young stellar objects. Now Laurent Loinard Universidad Nacional Autónoma de México claims that Sb is escaping the system after a close encounter with the Sa binary only about seven years ago. This remarkable claim is based on high-precision radio measurements made with the Very Large Array between 1983 and early 2001. If it is real this result is extremely significant for astronomy comments Charles J. Lada Smithsonian Astrophysical Observatory it could shed light on the origin of the many free-floating brown dwarfs in star-forming regions. However Mark J. Claussen National Radio Astronomy Observatory says another analysis of the VLA data fails to support the ejection scenario. Loinard does admit that it s extremely unlikely for such an ejection to be happening right now as we watch but he believes Claussen is wrong because Claussen s analysis fails to incorporate the motion of T Tau Sa around T Tau North. Figure 13 Press release for the ejected star story. Figure 14 Article on the Sky Telescope website for ejected star . 73 THE HANDS-ON GUIDE FOR SCIENCE COMMUNICATORS 4. The article in USA Today Figure 15 Article in the international newspaper USA Today about the ejected star . USA TODAY 9January 2003. Reprinted with Permission. Science Three-star system ejects weakest link Brown dwarf s ouster by gravity is first such sighting By Dan Vergano USA TODAY SEATTLE - Astronomers report a first sighting of a round of Survivor set in space - a weakling brown dwarf star being booted out of a triple-star solar system. Brown