A Spitzer Search for Infrared Excesses around Massive Young White Dwarfs

A Spitzer Search for Infrared Excesses around Massive Young White Dwarfs
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斯皮策太空望远镜在巨大的年轻白矮星周围寻找过量的红外光

DOI:
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发表时间:
2005
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通讯作者:
S. Wiktorowicz
S. Wiktorowicz
中科院分区:
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文献类型:
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作者:
B. Hansen;S. Kulkarni;S. Wiktorowicz

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我们使用斯皮策太空望远镜检查了14颗热白色矮星,以寻找红外过量的迹象。其中12个天体是巨大的白色矮星,被认为是双星合并的结果。剩下的两个物体是质量不足的白色矮星,可能是合并的结果,或者是一个亚恒星伴星的螺旋。在任何情况下,我们都没有发现任何明显的红外线超过8 μm波长的证据。这对轨道尘埃的存在有很强的限制,而对近距离的亚恒星同伴的存在有较弱的限制。
We examine 14 hot white dwarfs for signs of infrared excess using the Spitzer Space Telescope. Twelve of the objects are massive white dwarfs that have been suggested to be the result of binary mergers. The remaining two objects are undermassive white dwarfs that again may be the result of mergers, or of the in-spiral of a substellar companion. In no case do we find any evidence for significant infrared excesses out to wavelengths of 8 μm. This places strong constraints on the presence of orbiting dust and weaker constraints on the presence of close substellar companions.