红超巨星大犬座VY周围的一个巨大外壳
A large shell around the hypergiant VY Canis Majoris
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中文总结 AI 辅助
利用SPHEREx数据探测到红超巨星VY CMa周围一个直径约14'至15'的近圆形外壳，可能由恒星风从邻近恒星形成区清扫物质形成，但发射机制仍需进一步观测确认。
中文摘要 AI 辅助
我们利用宇宙历史、再电离纪元和冰层探索者分光光度计（SPHEREx）的数据，报告探测到红超巨星大犬座VY（VY CMa）周围一个显著的外壳。该外壳在天空平面上的投影呈现为环形，外观近乎圆形。其外径约为14'至15'，在SPHEREx 7827Å分光光度图像中最为清晰。若干与VY CMa径向对齐的丝状结构在多个位置横穿该外壳。我们讨论了该外壳可能是由VY CMa的恒星风从邻近恒星形成区Sh 2-310中清扫出的物质这一可能性。我们探讨了共振原子散射、光回声或扩展红发射作为所观测到的SPHEREx辐射的来源。然而，每种解释都存在困难，因此进一步的观测非常必要。
英文摘要
We report the detection of a remarkable shell around the red hypergiant VY CMa using data from the Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer (SPHEREx). The shell, which in projection on the plane of the sky appears as a ring, is almost circular in appearance. It has an external diameter of $\sim14'$ to $15'$, and is seen most clearly in the SPHEREx 7827A spectro-photometric image. Filaments, radially aligned with VY CMa, are seen to cut across the shell in several places. We discuss the possibility that the shell is matter swept out from the neighboring star forming region Sh 2-310, by the wind from VY CMa. Resonant atomic scattering, a light echo, or Extended Red Emission are explored as the source of the observed SPHEREx emission. However, no interpretation is without difficulty and further observations are most desirable.
