Publications

  • Measuring Cosmological Parameters with Type Ia Supernovae in redMaGiC Galaxies

    Current and future cosmological analyses with Type Ia supernovae (SNe Ia) face three critical challenges: (i) measuring the redshifts from the SNe or their host galaxies; (ii) classifying the SNe without spectra; and (iii) accounting for correlations between the properties of SNe Ia and their host galaxies. We present here a novel approach that

    Chen, R. et al.

    Advertised on:

    10
    2022
  • SPECULOOS Northern Observatory: Searching for Red Worlds in the Northern Skies

    SPECULOOS is a ground-based transit survey consisting of six identical 1 m robotic telescopes. The immediate goal of the project is to detect temperate terrestrial planets transiting nearby ultracool dwarfs (late M-dwarf stars and brown dwarfs), which could be amenable for atmospheric research with the next generation of telescopes. Here, we report

    Burdanov, Artem Y. et al.

    Advertised on:

    10
    2022
  • A refined dynamical mass for the black hole in the X-ray transient XTE J1859+226

    We present two contiguous nights of simultaneous time-resolved Gran Telescopio Canarias spectroscopy and William Herschel Telescope photometry of the black hole X-ray transient XTE J1859+226, obtained in 2017 July during quiescence. Cross-correlation of the individual spectra against a late K-type spectral template enabled us to constrain the

    Yanes-Rizo, I. V. et al.

    Advertised on:

    11
    2022
  • Black hole mass and spin measurements through the relativistic precession model: XTE J1859+226

    The X-ray light curves of accreting black holes and neutron stars in binary systems show various types of quasi-periodic oscillations (QPOs), the origin of which is still debated. The relativistic precession model identifies the QPO frequencies with fundamental time-scales from General Relativity, and has been proposed as a possible explanation of

    Motta, S. E. et al.

    Advertised on:

    11
    2022
  • Cosmological gas accretion history onto the stellar discs of Milky Way-like galaxies in the Auriga simulations - (I) Temporal dependency

    We use the 30 simulations of the Auriga Project to estimate the temporal dependency of the inflow, outflow, and net accretion rates onto the discs of Milky Way-like galaxies. The net accretion rates are found to be similar for all galaxies at early times, increasing rapidly up to $\sim 10~\mathrm{M}_\odot \, \mathrm{yr}^{-1}$. After ~6 Gyr of

    Iza, Federico G. et al.

    Advertised on:

    11
    2022
  • Evidence of a flare ignited above a low-latitude spotted active region in the ultrafast rotator HK Aqr

    We study the magnetic activity in the ultrafast rotator dMe HK Aqr using tomography techniques with high-resolution spectroscopy. We aim to characterize how this magnetic activity appears in a regime of very fast rotation without external forces, given that HK Aqr is, very likely, a single star. We find dark spots located at low latitudes. We also

    Martínez González, María Jesús et al.

    Advertised on:

    11
    2022