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HVC 127-41-330

HVC 127-41-330
星云
观测资料: J2000.0[1] epoch
赤经01h 05m[1]
赤纬+21.8°[1]
距离2,300,000 光年   (700,000[2] 秒差距)
名称HVC 127-41-331、HVC 128-41-329、HVC 127-42-352、HVC 127-41-330[1]
相关条目:星云列表

HVC 127-41-330是位于双鱼座高速云。组成其名称的三个数值分别表示银河系的经度和纬度,以及对地球的速度(单位为km/s)。它的直径为20,000光年,距离地球230万光年(700千秒差距),位于M31M33之间[2]。与其它HVCs不同,这种中性氢云(可通过21cm H-I发射检测)显示出旋转分量和暗物质。云的质量80%是暗物质。它也是第一个被发现与银河系或子群(亚群)无关的HVC

天文学家乔希·西蒙(Josh Simon)认为它是暗星系的候选者[2]。由于它的自转,它可能是一个密度非常低的矮星系未使用的氢(没有恒星),是本星系群形成的残余。

相关条目

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HVC 127-41-330
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