On the existence of young embedded clusters at high Galactic latitude
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Дата
2017
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Анотація
Careful analyses of photometric and star count data available for the nine putative
young clusters identified by Camargo et al. (2015, 2016) at high Galactic latitudes
reveal that none of the groups contain early-type stars, and most are not significant
density enhancements above field level. 2MASS colours for stars in the groups match
those of unreddened late-type dwarfs and giants, as expected for contamination by
(mostly) thin disk objects. A simulation of one such field using only typical high
latitude foreground stars yields a colour-magnitude diagram that is very similar to
those constructed by Camargo et al. (2015, 2016) as evidence for their young groups
as well as the means of deriving their reddenings and distances. Although some of
the fields are coincident with clusters of galaxies, one must conclude that there is no
evidence that the putative clusters are extremely young stellar groups.
Опис
Ключові слова
Astronomical techniques, photometric — Galaxy, open clusters and associations, general — infrared: general
Бібліографічний опис
Monthly Notices of the Royal Astronomical Society