| 词条 | Wisconsin H-Alpha Mapper |
| 释义 |
The Wisconsin H-Alpha Mapper (WHAM) is a custom-built {{convert|0.6|m|in}} telescope operated by the University of Wisconsin–Madison, used to study the Hydrogen-alpha ions of the warm ionized medium. It is a tenant telescope at the Cerro Tololo Inter-American Observatory (CTIO), in the Coquimbo Region of northern Chile. HistoryFirst interest in the ionised hydrogen of the interstellar medium came when Ron Reynolds pointed a spectrometer through a makeshift observing portal in an office of the University of Wisconsin-Madison's Physical Sciences Laboratory during the late 1970s. Reynolds and colleagues, including Matt Haffner, a senior scientist in UW-M's astronomy department, later developed WHAM.[1] WHAM formally began life at Kitt Peak National Observatory (KPNO) in November 1996, using the flat mirrors of a two axis, all-sky siderostat passing light horizontally through a 0.6 m diameter, 8.6 m focal length objective lens into a 2.5 m x 2.5 m x 6 m trailer that contained the spectrometer, that used a low noise, high efficiency CCD camera as a multichannel detector behind a pair of {{convert|15|cm|in}} diameter Fabry-Perot etalons/spectrometers.[2] The system was automated, so that the entire WHAM facility, including opening and closing at the beginning and end of the observing night, was operated from a campus office at the University of Wisconsin in Madison. It operated there from 1996 to 2008. In 2009, WHAM was moved from KPNO to CTIO.[1] WHAM's field of view allows a whole sky survey in about 2 years. WHAM mapped the details of the Reynolds Layer. References1. ^1 WHAM Brings Milky Way's Ionized Hydrogen into Focus, SpaceDaily.com, 2017-04-12 2. ^The Wisconsin H-Alpha Mapper, R.J. Reynolds et al, Australian Astronomical Society, V15 N1, accessed 13 April 2017 External links
3 : University of Wisconsin–Madison|Optical telescopes|Astronomical observatories in Chile |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。