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Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids: Final Results
Nancy Remage Evans, H. Moritz Guenther, Howard E. Bond +13
Cepheids in multiple systems provide information on the outcome of the formation of massive stars. They can also lead to exotic end-stage objects. This study concludes our survey o…
Runaway OB Stars in the Small Magellanic Cloud: Dynamical Versus Supernova Ejections
J. Dorigo Jones, M. S. Oey, K. Paggeot +2
Runaway OB stars are ejected from their parent clusters via two mechanisms, both involving multiple stars: the dynamical ejection scenario (DES) and the binary supernova scenario (…
The Close Binary Fraction as a Function of Stellar Parameters in APOGEE: A Strong Anti-Correlation With Abundances
Christine N. Mazzola, Carles Badenes, Maxwell Moe +20
We use observations from the APOGEE survey to explore the relationship between stellar parameters and multiplicity. We combine high-resolution repeat spectroscopy for 41,363 dwarf…
The Rich Lack Close Neighbours: The Dependence of Blue-Straggler Fraction on Metallicity
Rosemary F. G. Wyse, Maxwell Moe, Kaitlin M. Kratter
Blue straggler stars (BSS) have been identified in star clusters and in field populations in our own Milky Way galaxy and in its satellite galaxies. They manifest as stars bluer an…
A new and unusual LBV-like outburst from a Wolf-Rayet star in the outskirts of M33
Nathan Smith, Jennifer E. Andrews, Maxwell Moe +8
MCA-1B (also called UIT003) is a luminous hot star in the western outskirts of M33, classified over 20yr ago with a spectral type of Ofpe/WN9 and identified then as a candidate lum…