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- W4288083785 endingPage "A6" @default.
- W4288083785 startingPage "A6" @default.
- W4288083785 abstract "Analyses of large spectroscopic surveys of early-type stars in the LMC have found an excess of nitrogen enriched B-type targets with a vsini<40 km/s compared with the predictions of single star evolutionary models incorporating rotational mixing. By contrast the number of such targets with 40<vsini<80 km/s were consistent with such models. We have undertaken a similar analysis for 61 B-type similar targets, towards the young cluster, NGC 346 in the Small Magellanic Cloud (SMC). Approximately 65% could have nitrogen enhancements of less than 0.3 dex, consistent with them having experienced only small amounts of mixing due to their low rotational velocities. However as with the previous LMC surveys, an excess of stars with low projected rotational velocities, vsini<40 km/s and significant nitrogen enrichments is found. This is estimated to be approximately 5% of the total population of apparently single B-type stars or 40% of all stars with current rotational velocities of less than 40 km/s. For all three surveys, the presence of undetected binaries and other uncertainties imply that these percentages might be underestimated and indeed it is possible that all single stars with current rotational velocities of less than 40 km/s are nitrogen enriched. Possible explanations incorporate the effects of magnetic fields, via either a stellar merger followed by magnetic breaking or the evolution of a single star with a large magnetic field. Both mechanisms are compatible with the observed frequency of nitrogen-enriched stars in the Magellanic Clouds. Differences in the properties of the nitrogen-enriched stars compared with the remainder of the sample would be consistent with the former mechanism. For the latter, a qualitative comparison with evolutionary models incorporating magnetic fields is encouraging in terms of the amount of nitrogen enrichment and its presence in stars near the ZAMS." @default.
- W4288083785 created "2022-07-28" @default.
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- W4288083785 creator A5033311951 @default.
- W4288083785 creator A5061860751 @default.
- W4288083785 date "2020-01-28" @default.
- W4288083785 modified "2023-09-27" @default.
- W4288083785 title "The NGC 346 massive star census" @default.
- W4288083785 cites W147232447 @default.
- W4288083785 cites W1847957882 @default.
- W4288083785 cites W1864975043 @default.
- W4288083785 cites W1963836638 @default.
- W4288083785 cites W1965080790 @default.
- W4288083785 cites W1966338610 @default.
- W4288083785 cites W1968444486 @default.
- W4288083785 cites W1987079650 @default.
- W4288083785 cites W1994397915 @default.
- W4288083785 cites W1997193153 @default.
- W4288083785 cites W2002175961 @default.
- W4288083785 cites W2006553610 @default.
- W4288083785 cites W2006665080 @default.
- W4288083785 cites W2013646551 @default.
- W4288083785 cites W2015295900 @default.
- W4288083785 cites W2015533492 @default.
- W4288083785 cites W2024460851 @default.
- W4288083785 cites W2024840617 @default.
- W4288083785 cites W2024909325 @default.
- W4288083785 cites W2027710064 @default.
- W4288083785 cites W2037216118 @default.
- W4288083785 cites W2042560935 @default.
- W4288083785 cites W2043792386 @default.
- W4288083785 cites W2050176398 @default.
- W4288083785 cites W2050470132 @default.
- W4288083785 cites W2052491072 @default.
- W4288083785 cites W2053662123 @default.
- W4288083785 cites W2059403709 @default.
- W4288083785 cites W2068123261 @default.
- W4288083785 cites W2073768640 @default.
- W4288083785 cites W2087686461 @default.
- W4288083785 cites W2088204054 @default.
- W4288083785 cites W2088535364 @default.
- W4288083785 cites W2092011950 @default.
- W4288083785 cites W2093828388 @default.
- W4288083785 cites W2094098364 @default.
- W4288083785 cites W2095901863 @default.
- W4288083785 cites W2102923722 @default.
- W4288083785 cites W2109202134 @default.
- W4288083785 cites W2113865096 @default.
- W4288083785 cites W2114246636 @default.
- W4288083785 cites W2114474596 @default.
- W4288083785 cites W2121128861 @default.
- W4288083785 cites W2128689856 @default.
- W4288083785 cites W2135979553 @default.
- W4288083785 cites W2138734559 @default.
- W4288083785 cites W2140288612 @default.
- W4288083785 cites W2141266215 @default.
- W4288083785 cites W2152242821 @default.
- W4288083785 cites W2153171474 @default.
- W4288083785 cites W2185590422 @default.
- W4288083785 cites W2203645496 @default.
- W4288083785 cites W2259125067 @default.
- W4288083785 cites W2287482290 @default.
- W4288083785 cites W2324526116 @default.
- W4288083785 cites W2540128138 @default.
- W4288083785 cites W2549284802 @default.
- W4288083785 cites W2610220141 @default.
- W4288083785 cites W2735763165 @default.
- W4288083785 cites W2798336535 @default.
- W4288083785 cites W2899497983 @default.
- W4288083785 cites W2917550843 @default.
- W4288083785 cites W2979968385 @default.
- W4288083785 cites W3025918851 @default.
- W4288083785 cites W3098499564 @default.
- W4288083785 cites W3098949100 @default.
- W4288083785 cites W3099676812 @default.
- W4288083785 cites W3101464890 @default.
- W4288083785 cites W3101898315 @default.
- W4288083785 cites W3103356242 @default.
- W4288083785 cites W3103371075 @default.
- W4288083785 cites W3103811005 @default.
- W4288083785 cites W3103854013 @default.
- W4288083785 cites W3104502759 @default.
- W4288083785 cites W3105032814 @default.
- W4288083785 cites W3105067962 @default.
- W4288083785 cites W3105294933 @default.
- W4288083785 cites W3212056194 @default.
- W4288083785 cites W4213261628 @default.
- W4288083785 cites W4231927706 @default.
- W4288083785 cites W4239033462 @default.
- W4288083785 cites W4289775892 @default.
- W4288083785 cites W4293012794 @default.
- W4288083785 cites W4293228180 @default.
- W4288083785 cites W4295973323 @default.
- W4288083785 cites W4295973324 @default.
- W4288083785 cites W4295973707 @default.
- W4288083785 cites W4295973747 @default.
- W4288083785 cites W4295974536 @default.