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Showing 1–8 of 8 results
Advanced filters: Author: J. Najita Clear advanced filters
  • An ultraviolet- and carbon-rich environment is needed to explain the bright emission coming from complex organic molecules observed near the midplane of protoplanetary disks. This implies that the gaseous reservoir from which actively forming planets accrete is carbon and organic rich.

    • Jenny K. Calahan
    • Edwin A. Bergin
    • Ke Zhang
    Research
    Nature Astronomy
    Volume: 7, P: 49-56
  • The youngest protostellar objects show many signs of rapid development from their initial, spheroidal configurations. Watson et al. find in NGC1333 — IRAS4B a rich emission spectrum of H2O, at wavelengths 20–37 mm, which indicates an origin in extremely dense, warm gas. They model the emission as infall from a protostellar envelope onto the surface of a deeply embedded, dense disc. This is the only example in a sample of 30 class 0 objects, perhaps arising from a favourable orientation or this may be an early and short-lived stage in the evolution of a protoplanetary disk.

    • Dan M. Watson
    • C. J. Bohac
    • J. R. Houck
    Research
    Nature
    Volume: 448, P: 1026-1028
  • The spectroscopic and photometric observations of a high-mass, transiting warm Jupiter, TIC 241249530 b, with an orbital eccentricity of 0.94, provide evidence that hot Jupiters may have formed by means of a high-eccentricity tidal-migration pathway.

    • Arvind F. Gupta
    • Sarah C. Millholland
    • Carl Ziegler
    ResearchOpen Access
    Nature
    Volume: 632, P: 50-54
  • This paper reports spectrally dispersed near-infrared interferometric observations that probe the gas (which dominates the mass and dynamics of the inner disk) and dust within one astronomical unit (Sun–Earth distance) of the young star MWC 480. Water vapour and atomic hydrogen exist interior to the edge of the dust disk. The water vapor is likely produced by the sublimation of migrating icy bodies.

    • J. A. Eisner
    Research
    Nature
    Volume: 447, P: 562-564