RogerEMoore on 27-Feb-2019 15:39:33 GMT about HD 152751
HD 152751 (Wolf 630 / V1054 Oph) renaming of components
A divergence exists in the alphabetical designations of the two component stars of the spectroscopic binary HD 15271 B, with an occasional redesignation of the entire system. Alphabetical renaming of components is hardly unusual for this system. For example, one paper (Johnson, 1981) had Wolf 630 A, B, and C (VB 8) per usual, but D was Wolf 629. Another (Caballero, 2007) refers to V1054 Oph ABCDE without clarification.
The earliest papers discussing HD 15271 B as a spectroscopic binary usually did so without naming either component (e.g., Weis, 1982; Pettersen, Evans & Coleman, 1984), as one could not be distinguished from the other. Several did anyway, such as Johnson (1983: "Origins and ages...") who identified Gliese 644 B as "B ab" without further defining the components.
Ségransan, Delfosse, Forveille, et al., (2000) worked out the masses and finally named the two components Gliese 644 Ba (the more massive one) and Gliese 644 Bb. This nomenclature has been followed by other researchers (e.g., Mazeh, Latham, Goldberg, et al., 2001; Cortes-Contreras, Bejar, Caballero, et al., 2016).
However, a second camp is established in which the Ba component is just B, and the less massive Bb component is D (Henry, Walkowicz, Barto, et al., 2002). C is usually reserved for VB 8, though it looks peculiar in hierarchy diagrams. This change has its adherents (Davison, White, Henry, et al., 2015; Clements, Henry, Hosey, et al., 2017), but it has not been without error, such as the system hierarchy GJ 644 ABC-D-GJ 643 (Davison, White, Jao, et al., 2014), in which VB 8 is now D, Ba = B, and Bb = C.
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