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

The N2K planet search program was designed to exploit the planet-metallicitycorrelation by searching for gas giant planets orbiting metal-rich stars. Here,we present the radial velocity measurements for 378 N2K target stars that wereobserved with the HIRES spectrograph at Keck Observatory between 2004 and 2017.With this data set, we announce the discovery of six new gas giant exoplanets:a double-planet system orbiting HD 148164 ($M \sin i$ of 1.23 and 5.16 M$_{\rmJUP}$) and single planet detections around HD 55696 ($M \sin i$ = 3.87 M$_{\rmJUP}$), HD 98736 ($M \sin i$ = 2.33 M$_{\rm JUP}$), HD 203473 ($M \sin i$ = 7.8M$_{\rm JUP}$), and HD 211810 ($M \sin i$ = 0.67 M$_{\rm JUP}$). These gasgiant companions have orbital semi-major axes between 1.0 and 6.2 AU andeccentricities ranging from 0.13 to 0.71. We also report evidence for threegravitationally bound companions with $M \sin i$ between 20 to 30 M$_{\rmJUP}$, placing them in the mass range of brown dwarfs, around HD 148284, HD214823, and HD 217850, and four low mass stellar companions orbiting HD 3404,HD 24505, HD 98630, and HD 103459. In addition, we present updated orbitalparameters for 42 previously announced planets. We also report a nondetectionof the putative companion HD 73256 b. Finally, we highlight the most promisingcandidates for direct imaging and astrometric detection, and find that many hotJupiters from our sample could be detectable by state-of-the-art telescopessuch as Gaia.

Radial velocities from the N2K Project: 6 new cold gas giant planets orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810