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

Very young massive planets are sufficiently luminous by their internal heatof formation to permit detailed studies, including spectroscopy of theiratmospheres with large telescopes at sufficient resolution ($\lambda / \Delta\lambda \gtrsim 1000$) to identify major constituents to inform models ofplanet formation and early evolution. We obtained 1-2.4$\mu$m ($YJHK$) spectraof the planetary-mass "b" companion of 2MASS~J04372171+2651014, a 1-3 Myr-old Mdwarf member of the Taurus star-forming region, and one of the youngest suchobjects discovered to date. These indicate the presence of CO and possiblyH$_2$O and CH$_4$ in the atmosphere, all suggesting a $T_{\rm eff}$ of around1200K, characteristic of a L-T transition spectral type and consistent withprevious estimates based on its luminosity and age. The absence or attenuationof spectral features at shorter wavelengths suggests the presence ofmicron-size dust, consistent with the object's red color. The spectrum of2M0437b resembles those of the HR 8799 planets, especially the innermost "b"planet, with the exception of a pronounced flux deficit in the $H$-band ofuncertain origin.

CO, H$_2$O, and CH$_4$ in the Dusty Atmosphere of a $\le$5 Myr-old Exoplanet