瑞银：长和维持“买入”评级 目标价101港元

yun2026

瑞银：长和维持“买入”评级 目标价101港元

2026年10月，天文学家重新分析哈勃空间望远镜历史光谱时，在白矮星HS 0209+0832系统发现异常化学线索，提出其附近可能存在由恒星晚期抛出物质形成的第二代行星。研究人员借助更新后的元素数据库，识别出以往难以解释的多条光谱特征，其中铌的信号受到特别关注。

白矮星是低质量恒星演化后留下的致密核心，形成前会向外释放大量物质。团队认为，这些富含特定元素的物质可能重新聚集，形成新的气态行星，从而解释观测到的异常丰度。该研究把保存多年的数据与改进的化学资料结合，说明旧观测仍可能提供新的发现。不过，目前证据主要来自光谱组成与演化模型，并不是直接拍摄到第二代行星，也不能把这一解释视为最终确认。后续需要更多观测检验物质来源和系统结构。如果推断得到支持，将说明行星形成可能并不只发生在恒星诞生时，还能出现在恒星生命晚期留下的环境中。

https://lightroom.adobe.com/shares/db647f9b26fa0840be0558c6799012f5
https://lightroom.adobe.com/shares/159258d4ac92fc48b9801268dfdc1c16
https://lightroom.adobe.com/shares/6cbcf9c97bc6614db2e63b12d641388e
https://lightroom.adobe.com/shares/d5864fc1e04bbe4fb76bc35e93955661
https://lightroom.adobe.com/shares/0ba679a33bd7f3498c2d9d6ba9c20771
https://lightroom.adobe.com/shares/a746ab4525b618448b4320a2625b35eb
https://lightroom.adobe.com/shares/2e15b4c3d4d5e144bebfc565d4ea8b0e
https://lightroom.adobe.com/shares/360b88d99511b84dac66b28c5df923cc
https://lightroom.adobe.com/shares/8560f81d32a64149b4d9e29382e85ae8
https://lightroom.adobe.com/shares/27a19caf53810d46898a493c61ce6376
https://lightroom.adobe.com/shares/feee94d47f46a94fb28411161d888bc8
https://lightroom.adobe.com/shares/81765df197737c47818f3675b5728f53
https://lightroom.adobe.com/shares/eb84bd9ac16224449c3a5bef294e1435
https://lightroom.adobe.com/shares/53868f6b87f3c04191fa47ab0bdb58e6
https://lightroom.adobe.com/shares/51b46ab56e3fdb49bd624f695f678f66
https://lightroom.adobe.com/shares/d8924d8c84454844a63764c8699c9986
https://lightroom.adobe.com/shares/f9c5e3f6732cfc4aa4dfeba93b2fcbe7
https://lightroom.adobe.com/shares/66b74436b4618f4da3d7ff902fe7cb5f
https://lightroom.adobe.com/shares/cb8238164e391b4ba9272675e1a0824a
https://lightroom.adobe.com/shares/fd2e6cebf049c24895511e643f9a6d8b
https://lightroom.adobe.com/shares/2e24075d34610943a55c49722a3351b5
https://lightroom.adobe.com/shares/c8e2ff08bf18524dbdde7a6f914363ad
https://lightroom.adobe.com/shares/0e819f08473f57498fc9f092a775284f
https://lightroom.adobe.com/shares/b05bec141aad1a4aa8d6ed565bed559d
https://lightroom.adobe.com/shares/c62e4fded031744d841297b8dedfa7fb
https://lightroom.adobe.com/shares/167eb17cd8320b4b842b55868e6ac070
https://lightroom.adobe.com/shares/0f59c7e70366ed48bde17f6706740a26
https://lightroom.adobe.com/shares/08703bfedb02694eb68a1e4b9839cb2a
https://lightroom.adobe.com/shares/c015376bb3f89349ba89bd91560a99ea
https://lightroom.adobe.com/shares/1018477ab89ca447b7763f0eff5d3878
https://lightroom.adobe.com/shares/f0007c6d303c2b42b48696517ea6b9ab
https://lightroom.adobe.com/shares/076c6ddbba0a3e4cb556ba671ed1d36b
https://lightroom.adobe.com/shares/d2dd28ed42c2674a8f25fd878802661d
https://lightroom.adobe.com/shares/af66fb72d062554ea683d20d2fdc408a
https://lightroom.adobe.com/shares/ac0ff5d818c66549968a4e3d7afdfaa4
https://lightroom.adobe.com/shares/dd104f0ba3d44441a82c9215873a1bdd
https://lightroom.adobe.com/shares/61a02096291cac498ef9a562042378a3
https://lightroom.adobe.com/shares/b6a3ff175242cf46a4ecd940bfced5a4
https://lightroom.adobe.com/shares/0f52130167b48644b294bf6c370235e4
https://lightroom.adobe.com/shares/2d283185375df04aaace8b92555f2d82
https://lightroom.adobe.com/shares/172eb280bd127246b3bdad06f9c7c4e1
https://lightroom.adobe.com/shares/5ce15c38ba99924dae4680d418dd98c4
https://lightroom.adobe.com/shares/ca4f42001b5fc847a3a8e4ae1d4ce56c
https://lightroom.adobe.com/shares/5d84d9de77c3004bb347e7b9a9b40fca
https://lightroom.adobe.com/shares/8e061466ca120a4db52d9c4643178377
https://lightroom.adobe.com/shares/95597eddbfef2443acb15506cd4191bb
https://lightroom.adobe.com/shares/9dab1781291d0d42bac6844ae89b79ce
https://lightroom.adobe.com/shares/c36f09f053c61b479f8d5ba0298708bd
https://lightroom.adobe.com/shares/f5b8a41dfbf21c468069a669a4082103
https://lightroom.adobe.com/shares/7f83a7b29b26e5438894df973520df83