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23 April 2024 |
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Article overview
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Radial Velocity Studies of Close Binary Stars. XV | | T. Pribulla
; S.M. Rucinski
; R.M. Blake
; W. Lu
; J.R. Thomson
; H. DeBond
; T. Karmo
; A. de Ridder
; W. Ogloza
; G. Stachowski
; M. Siwak
; | | Date: |
6 Dec 2008 | | Abstract: | Radial-velocity measurements and sine-curve fits to the orbital radial
velocity variations are presented for the last eight close binary systems
analyzed the same way as in the previous papers of this series: QX And, DY Cet,
MR Del, HI Dra, DD Mon, V868 Mon, ER Ori, and Y Sex. For another seven systems
(TT Cet, AA Cet, CW Lyn, V563 Lyr, CW Sge, LV Vir and MW Vir) phase coverage is
insufficient to provide reliable orbits but radial velocities of individual
components were measured. Observations of a few complicated systems observed
throughout the DDO close-binary program are also presented; among them an
especially interesting is the multiple system V857 Her which - in addition to
the contact binary - very probably contains one or more sub-dwarf components of
much earlier spectral type. All suspected binaries which were found to be most
probably pulsating stars are briefly discussed in terms of mean radial
velocities and projected rotation velocities (v sin i) as well as spectral type
estimates. In two of them, CU CVn and V752 Mon, the broadening functions show a
clear presence of non-radial pulsations. The previously missing spectral types
for the DDO I paper are given here in addition to such estimates for most of
the program stars of this paper. | | Source: | arXiv, 0812.1313 | | Services: | Forum | Review | PDF | Favorites | |
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