Gems in the outer galaxy: Near-infrared imaging of three young clusters at large galactic radii

Download
  1. Get@NRC: Gems in the outer galaxy: Near-infrared imaging of three young clusters at large galactic radii (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1088/0004-637X/781/2/95
AuthorSearch for:
TypeArticle
Journal titleThe Astrophysical Journal
ISSN0004-637X
Volume781
Issue2
Article number95
AbstractImages recorded with the Gemini South Adaptive Optics Imager (GSAOI) and corrected for atmospheric seeing by the Gemini Multi-conjugate Adaptive Optics System are used to investigate the stellar contents of the young outer Galactic disk clusters Haffner 17, NGC 2401, and NGC 3105. Ages estimated from the faint end of the main sequence (MS) and the ridgeline of the pre-main sequence on the (K, J-K) color-magnitude diagrams are consistent with published values that are based on the MS turnoff, with the GSAOI data favoring the younger end of the age range for NGC 2401 in the literature. The mass function (MF) of NGC 2401 is similar to that in the solar neighborhood, and stars spanning a wide range of masses in this cluster have similar clustering properties on the sky. It is concluded that NGC 2401 is not evolved dynamically. In contrast, the MF of Haffner 17 differs significantly from that in the solar neighborhood over all masses covered by these data, while the MF of NGC 3105 is deficient in objects with sub-solar masses when compared with the solar neighborhood. Low-mass objects in Haffner 17 and NGC 3105 are also more uniformly distributed on the sky than brighter, more massive, MS stars. This is consistent with both clusters having experienced significant dynamical evolution. © 2014. The American Astronomical Society. All rights reserved.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270787
Export citationExport as RIS
Report a correctionReport a correction
Record identifier52bd2eda-1acb-4de1-a94f-ed0cdb167aa0
Record created2014-02-17
Record modified2016-07-18
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)