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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

K2 was a community-driven NASA mission where all targets were proposedthrough guest observer programs. Among those, the K2 Galactic ArchaeologyProgram (K2GAP) was devoted to measuring asteroseismic signals from giant starsto inform studies of the Galaxy, with about 25% of the observed K2 targetsbeing allocated to this program. Here, we provide an overview of this program.We discuss in detail the target selection procedure and provide a python codethat implements the selection function, see https://github.com/sanjibs/k2gap .Additionally, we discuss the detection completeness of the asteroseismicparameters $\nu_{\rm max}$ and $\Delta \nu$. Broadly speaking, the targets wereselected based on 2MASS color $J-Ks > 0.5$, with finely tuned adjustments foreach campaign. Making use of the selection function we compare the observeddistribution of asteroseismic masses to theoretical predictions. The medianasteroseismic mass is higher by about 4% compared to predictions. Additionally,the number of seismic detections is on average 14% lower than expected. Weprovide a selection-function-matched mock catalog of stars based on a syntheticmodel of the Galaxy for the community to be used in subsequent analyses of theK2GAP data set, see http://www.physics.usyd.edu.au/k2gap .

The K2 Galactic Archaeology Program: Overview, target selection and survey properties