Please use this identifier to cite or link to this item:
Title: Pleiades or Not? Resolving the Status of the Lithium-rich M Dwarfs HHJ 339 and HHJ 430
Authors: Stauffer, J.
Barrado, D.
David, T.
Rebull, L. M.
Hillenbrand, L. A.
Mamajek, E. E.
Oppenheimer, R.
Aigrain, S.
Bouy, H.
Lillo Box, J.
Keywords: Moving clusters;Star clusters;Open star clusters
Issue Date: 18-Jun-2020
Publisher: The Institute of Physics (IOP)
DOI: 10.3847/1538-3881/ab93c9
Published version:
Citation: The Astronomical Journal 160(1): 30(2020)
Abstract: Oppenheimer et al. discovered two M5 dwarfs in the Pleiades with nearly primordial lithium. These stars are not low enough in mass to represent the leading edge of the lithium depletion boundary at Pleiades age (~125 Myr). A possible explanation for the enhanced lithium in these stars is that they are actually not members of the Pleiades but instead are members of a younger moving group seen in projection toward the Pleiades. We have used data from Gaia DR2 to confirm that these two stars, HHJ 339 and HHJ 430, are indeed not members of the Pleiades. Based on their space motions, parallaxes, and positions in a Gaia-based color–magnitude diagram, it is probable that these two stars are about 40 parsecs foreground to the Pleiades and have ages of ~25 Myr. Kinematically they are best matched to the 32 Ori moving group.
E-ISSN: 1538-3881
ISSN: 0004-6256
Appears in Collections:(CAB) Artículos

Files in This Item:
File Description SizeFormat 
Stauffer_2020_AJ_160_30.pdf872,15 kBAdobe PDFThumbnail

This item is licensed under a Creative Commons License Creative Commons