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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

While spectroscopically characterizing nearby ultracool dwarfs discovered inthe Gaia Second Data Release with the TripleSpec spectrograph on the Palomar200'' telescope, we encountered a particularly cool, nearby, new member of thesolar neighborhood: Gaia DR2 3106548406384807680 = WISE J064336.71-022315.4 =2MASS J06433670-0223130. The $\it{Gaia}$ parallax corresponds to a distance of13.9 $\pm$ 0.3 pc. Using our TripleSpec spectrum we classify W0643 as spectraltype L8, and measured a heliocentric radial velocity of 142 $\pm$ 12 kms$^{-1}$. When combined with $\it{Gaia}$ astrometry, we determine a Galacticvelocity (heliocentric; $U$ towards Galactic center) of $U, V, W$ = -109, -91,-12 ($\pm$10, 5, 3) km s$^{-1}$. We estimate that W0643 passed within $\sim$1.4pc away from the Sun $\sim$100,000 years ago.

WISE J064336.71-022315.4: A Thick Disk L8 Gaia DR2-Discovered Brown Dwarf at 13.9 Parsecs