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IRC+10420

IRC+1420(也称为天鹰座V1302)是位于天鹰座的一颗特超巨星(不过早期将它分类为原行星云),距离太阳大约3-5千秒差距

物理性质

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尽管比我们的太阳亮500,000倍以上,还是已知最亮的天体之一,IRC+10420仍然不能用裸眼直接看见,而必须使用望远镜观测。

IRC+10420的光谱在过去的10年,在未经由光度变化的验证下,已经从晚期的F型变成A型。这显示IRC+10420正在从赫罗图上的红巨星模式演变成高光度蓝变星沃夫-瑞叶星 、或是爆前超新星。模型表明它在生命开始时的拥有40-50太阳质量,而在强烈的恒星风作用下留失了许多的质量,而残余的质量大约正好是10太阳质量,并且它的实际上有着很高的表面温度,不过完全被一层假光球笼罩着,所以我们看见的IRC+10420的晚期型光谱,只是在她生命历程中被驱逐出的气体和尘埃形成的外壳包围着的壳层,而不是恒星的本身。

包围着的云气

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IRC+10420被由中央恒星强烈的恒星风驱逐,由大约30-40太阳质量形成的反射星云包围着。在哈伯太空望远镜的协助下,科学家对这个星云的研究显示它有着复杂的结构,包括弧、放射纹和凝块,并且和另一颗红特超巨星大犬座VY做过比较。

相关条目

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参考资料

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IRC+10420
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