| 翻訳と辞書 |
SN 1994I
SN 1994I is a Type Ic supernova discovered on April 2, 1994 in the Whirlpool Galaxy by amateur astronomers Tim Puckett and Jerry Armstrong of the Atlanta Astronomy Club. Type Ic supernova are a rare type of supernova that result from the explosion of a very massive star that has shed its outer layers of hydrogen and helium. The explosion results in a highly luminous burst of radiation that then dims over the course of weeks or months. SN 1994I was a relatively nearby supernova, and provided an important addition to the then small collection of known Type Ic supernova. Very early images were captured of SN 1994I, as two high school students in Oil City, Pennsylvania serendipitously took images of the Whirlpool Galaxy using the 30-inch telescope at Leuschner Observatory on March 31, 1994, which included SN 1994I just after it began to brighten.
==Discovery and observations==
SN 1994I was independently discovered by multiple observers, with the first reports from amateur astronomers Tim Puckett and Jerry Armstrong, followed within the hour by reports by amateurs Wayne Johnson and Doug Miller, Richard Berry, and Reiki Kushida. It was confirmed quickly by Michael Richmond and Alex Filippenko using the Berkeley Automated Imaging Telescope at Leuschner Observatory, who noted that SN 1994I was particularly blue.〔 Initial reports disagreed on the nature of the supernova, with different teams claiming that it was a Type Ia supernova, a Type II supernova, and a Type Ic supernova. Supernova types are observationally distinguished by the presence or absence of spectral lines, with hydrogen being the most important diagnostic. After a week of more data being collected, consensus grew among observers that SN 1994I was a Type Ic.〔
By chance, observations of SN 1994I were obtained before its discovery was reported. High school students Heather Tartara and Melody Spence requested observations of the Whirlpool Galaxy on March 29 and 31, 1994. Their request was made through the Hands-On Universe program, which allows elementary and high school students to request observations on automated telescopes.〔(【引用サイトリンク】 url = http://www.handsonuniverse.org/ )〕 Their images captured the Whirlpool Galaxy just before and after SN 1994I began to brighten, and are some of the earliest data recorded for a supernova.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「SN 1994I」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|