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

We describe the discovery of HAT-P-4b, a low-density extrasolar planettransiting BD+36 2593, a V = 11.2 mag slightly evolved metal-rich late F star.The planet's orbital period is 3.056536+/-0.000057 d with a mid-transit epochof 2,454,245.8154 +/- 0.0003 (HJD). Based on high-precision photometric andspectroscopic data, and by using transit light curve modeling, spectrumanalysis and evolutionary models, we derive the following planet parameters:Mp= 0.68 +/- 0.04 MJ, Rp= 1.27 +/- 0.05 RJ, rho = 0.41 +/- 0.06 g cm-3 and a =0.0446 +/- 0.0012 AU. Because of its relatively large radius, together with itsassumed high metallicity of that of its parent star, this planet adds to thetheoretical challenges to explain inflated extrasolar planets.

HAT-P-4b: A metal-rich low-density transiting hot Jupiter