比利时鲁汶大学及香港大学太空研究实验室的天文学家日前捕捉到史上首张“恒星风”的清晰影像,打破科学界过去认为星风是球形的假设。
恒星风是濒死恒星喷出的物质流。
天文学教授德奇领导团队,透过天文望远镜阿塔卡玛大型毫米及次毫米波阵列(ALMA),观察衰老的冷红巨星周围的恒星风,发现恒星风并非如天文学家共识般呈球形,而是具类似行星状星云的形状,有盘状、螺旋形、锥形等。
团队认为,濒死恒星周边伴星或行星质量大小会影响恒星风的形状,并根据最新发现估算,70亿年后太阳衰老殆尽时,星风将呈弱螺旋状。
有关研究结果周五已刊于国际学术期刊《科学》。
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