论文标题
半个世纪（1974年至2022年）的红色巨人V449 Cygni的光度测量。半定期变量恒星，周期为54天
Photometric survey of the red giant V449 Cygni over half a century (1974 to 2022). A semi-regular variable star with a period of ~54 days
论文作者
论文摘要
这项研究总结了1974年至2022年红色巨型V449 Cygni测量值的主要部分，该测量由Visual and CCD Geos观察者，Unione Astrofili Italiani和各种自动化望远镜获得。根据GCVS分类，V449 CYG在1970 - 1990年中的光变化更为对应于L型恒星，并具有不规则的振幅变化，有时以大约100天的准周期性为标志。自1990年代中期以来，这些变化变得更加规律，V幅度约为0.7幅度，大约54,1天，如各种时期搜索例程所示，应用于最佳的CCD系列。可以描述V449 CYG的长期变化约2000天的更长时间。因此，V449 CYG似乎是SRB型恒星。
This study sums up a major part of the red giant V449 Cygni measurements for the years 1974 through 2022, obtained by visual and CCD GEOS observers, the Unione Astrofili Italiani, and various automatized telescopes. It appears that the light variations of V449 Cyg in the years 1970-1990 corresponded more to an L-type star according to the GCVS classification, with irregular amplitude variations, sometimes marked by a quasi-periodicity of about 100 days. Since the mid-1990s, these variations have become more regular, with an amplitude of about 0.7 magnitude in V, and a period of about 54,1 days, as shown by various period search routines applied to the best recent CCD series. A longer period of about 2000 days is possible to describe the long term variation of V449 Cyg. Therefore, V449 Cyg appears to be an SRB-type star.
