English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

As part of our search for new low-mass members of nearby young moving groups(YMG), we discovered three low-mass, spectroscopic binaries, two of which arenot kinematically associated with any known YMG. Using high-resolution opticalspectroscopy, we measure the component and systemic radial velocities of thesystems, as well as their lithium absorption and H$\alpha$ emission, bothspectroscopic indicators of youth. One system (2MASS J02543316-5108313,M2.0+M3.0) we confirm as a member of the 40 Myr old Tuc-Hor moving group, butwhose binarity was previously undetected. The second young binary (2MASSJ08355977-3042306, K5.5+M1.5) is not a kinematic match to any known YMG, buteach component exhibits lithium absorption and strong and wide H$\alpha$emission indicative of active accretion, setting an upper age limit of 15 Myr.The third system (2MASS J10260210-4105537, M1.0+M3.0) has been hypothesized inthe literature to be a member of the 10 Myr old TW Hya Association (TWA), butwith our measured systemic velocity, shows the binary is in fact not part ofany known YMG. This last system also has lithium absorption in each component,and has strong and variable H$\alpha$ emission, setting an upper age limit of15 Myr based on the lithium detection.

ACRONYM IV: Three New, Young, Low-mass Spectroscopic Binaries