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Showing 1–9 of 9 results
Advanced filters: Author: D. Mawet Clear advanced filters

  • Analysis of the cool brown dwarf Gliese 229 B suggests that it is actually a close binary of two less massive brown dwarfs, explaining its low luminosity and settling the conflict between theoretical predictions and measurements.

    • Jerry W. Xuan
    • A. Mérand
    • J. Woillez
    Research
    Nature
    Volume: 634, P: 1070-1074

  • Three exoplanets around the star HR 8799 have recently been discovered by differential imaging with large telescopes. In such cases, bright scattered starlight means that large angular offsets of the star are required for high-contrast imaging of the planets. Imaging at small angles requires a technique for reducing starlight and associated noise while still transmitting light from the planet. Here such a technique is described: all three HR 8799 planets have been detected using a vector vortex coronagraph on a small-aperture system.

    • E. Serabyn
    • D. Mawet
    • R. Burruss
    Research
    Nature
    Volume: 464, P: 1018-1020

  • A soliton microcomb as an astronomical spectrograph calibrator is presented. It can ultimately have a footprint of a few cubic centimetres, and reduced weight and power consumption, attractive for precision radial velocity measurement.

    • Myoung-Gyun Suh
    • Xu Yi
    • Kerry Vahala
    Research
    Nature Photonics
    Volume: 13, P: 25-30

  • Observations of the young star HD 142527, whose disk is separated into inner and outer regions by a gap suggestive of the formation of a gaseous giant planet, show that accretion onto the star is maintained by a flow of gas across the gap, in agreement with dynamical models of planet formation.

    • Simon Casassus
    • Gerrit van der Plas
    • Vachail Salinas
    Research
    Nature
    Volume: 493, P: 191-194

  • Imaging of low-mass exoplanets can be achieved once the thermal background in the mid-infrared (MIR) wavelengths can be mitigated. Here, the authors present a ground-based MIR observing approach enabling imaging low-mass temperate exoplanets around nearby stars.

    • K. Wagner
    • A. Boehle
    • T. de Zeeuw
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • Polarization measurements are reported for the blazar Mk501, revealing a degree of X-ray polarization that is more than twice the optical value and supporting the shock-accelerated energy-stratified electron population scenario.

    • Ioannis Liodakis
    • Alan P. Marscher
    • Silvia Zane
    ResearchOpen Access
    Nature
    Volume: 611, P: 677-681

  • High-contrast imaging of the nearby, young, active late-type star AU Microscopii reveals five mysterious large-scale features in the southeast side of its debris disk, moving away from the star.

    • Anthony Boccaletti
    • Christian Thalmann
    • John Wisniewski
    Research
    Nature
    Volume: 526, P: 230-232