| 翻訳と辞書 |
L Carinae
HD 84810, also known as l Carinae (l Car), is a star in the southern constellation of Carina. It has a mean apparent magnitude of +3.4,〔 making it readily visible to the naked eye and one of the brighter members of Carina. Based upon parallax measurements, it is approximately from Earth.〔
From the characteristics of its spectrum, l Carinae has a stellar classification of G5 Iab/Ib.〔 This indicates the star has reached a stage in its evolution where it has expanded to become a supergiant with 169 times the radius of the Sun.〔 As this is a massive star with 8〔–13〔 times the mass of the Sun, it rapidly burns through its supply of nuclear fuel and has become a supergiant in roughly ,〔 after spending as a main sequence star.〔
l Carinae is classified as a Cepheid variable star and its brightness varies over an amplitude range of 0.725 in magnitude with a long period of 35.560 days. The radial velocity of the star likewise varies by 39 km/s during each pulsation cycle.〔 It has a compact circumstellar envelope that can be discerned using interferometry. The envelope has been resolved at an infrared wavelength of 10μm, showing a radius of 10–100 AU at a mean temperature of 100 K. The material for this envelope was supplied by mass ejected from the central star.〔
== References ==
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「L Carinae」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.
|
|