학술논문

Searching for new young stars in the Northern hemisphere: the Pisces moving group.
Document Type
Article
Source
Monthly Notices of the Royal Astronomical Society. Jan2018, Vol. 473 Issue 2, p2465-2485. 21p.
Subject
*KINEMATICS
*STAR formation
*OPTICAL spectra
*GALACTIC evolution
*NORTHERN sky (Astronomy)
Language
ISSN
0035-8711
Abstract
Using the kinematically unbiased technique described in Binks, Jeffries & Maxted (2015), we present optical spectra for a further 122 rapidly rotating (rotation periods <6 d), X-ray active FGK stars, selected from the SuperWASP survey. We identify 17 new examples of young, probably single stars with ages of <200 Myr and provide additional evidence for a new Northern hemisphere kinematic association: the Pisces moving group (MG). The group consists of 14 lithium-rich G- and K-type stars that have a dispersion of only ∼3 kms-1 in each Galactic space velocity coordinate. The group members are approximately coeval in the colour–magnitude diagram, with an age of 30-50 Myr, and have similar, though not identical, kinematics to the Octans-Near MG. [ABSTRACT FROM AUTHOR]