Publications

  • Stellar splashback: the edge of the intracluster light

    We examine the outskirts of galaxy clusters in the C-EAGLE simulations to quantify the 'edges' of the stellar and dark matter distribution. The radius of the steepest slope in the dark matter, commonly used as a proxy for the splashback radius, is located at $\sim \, r_{200 \rm m}$ ; the strength and location of this feature depends on the recent

    Deason, Alis J. et al.

    Advertised on:

    1
    2021
  • Strong Hα emission in the young planetary mass companion 2MASS J0249-0557 c

    Aims: Our objective is the optical and near-infrared spectroscopic characterisation of 2MASS J0249-0557 c, a recently discovered young planetary mass companion to the β Pictoris (~25 Myr) member 2MASS J0249-0557. Methods: Using the Visible and Infrared Survey Telescope for Astronomy Hemisphere Survey and the Two Micron All Sky Survey (2MASS) data

    Chinchilla, P. et al.

    Advertised on:

    1
    2021
  • The contribution of N-rich stars to the Galactic stellar halo using APOGEE red giants

    The contribution of dissolved globular clusters (GCs) to the stellar content of the Galactic halo is a key constraint on models for GC formation and destruction, and the mass assembly history of the Milky Way. Earlier results from APOGEE pointed to a large contribution of destroyed GCs to the stellar content of the inner halo, by as much as 25 ${{\

    Horta, Danny et al.

    Advertised on:

    1
    2021
  • The Occurrence of Rocky Habitable-zone Planets around Solar-like Stars from Kepler Data

    We present the occurrence rates for rocky planets in the habitable zones (HZs) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar properties. We provide the first analysis in terms of star-dependent instellation flux, which allows us to track HZ planets. We define η⊕ as the HZ occurrence of planets

    Bryson, Steve et al.

    Advertised on:

    1
    2021
  • The S2 stream: the shreds of a primitive dwarf galaxy

    The S2 stream is a kinematically cold stream that is plunging downwards through the Galactic disc. It may be part of a hotter and more diffuse structure called the Helmi stream. We present a multi-instrument chemical analysis of the stars in the metal-poor S2 stream using both high- and low-resolution spectroscopy, complemented with a re-analysis

    Aguado, David S. et al.

    Advertised on:

    1
    2021
  • TOI-519 b: A short-period substellar object around an M dwarf validated using multicolour photometry and phase curve analysis

    Context. We report the discovery of TOI-519 b (TIC 218795833), a transiting substellar object (R = 1.07 RJup) orbiting a faint M dwarf (V = 17.35) on a 1.26 d orbit. Brown dwarfs and massive planets orbiting M dwarfs on short-period orbits are rare, but more have already been discovered than expected from planet formation models. TOI-519 is a

    Parviainen, H. et al.

    Advertised on:

    1
    2021