Publications

  • Results of drift scanning to optimize the SNR in the mid-infrared

    Chopping and nodding is made to reduce the effects of the time variable components of (a) sky variation and (b) array background in the mid-infrared waveband when observing from the ground. This process, however, has many issues including reduced on-object photon collection time, demands on the secondary mirror, and nodding the telescope to remove

    Torres-Quijano, A. et al.

    Advertised on:

    1
    2021
  • A dearth of young and bright massive stars in the Small Magellanic Cloud

    Context. Massive star evolution at low metallicity is closely connected to many fields in high-redshift astrophysics, but is poorly understood so far. Because of its metallicity of ∼0.2 Z⊙, its proximity, and because it is currently forming stars, the Small Magellanic Cloud (SMC) is a unique laboratory in which to study metal-poor massive stars

    Schootemeijer, A. et al.

    Advertised on:

    2
    2021
  • Cosmological constraints from DES Y1 cluster abundances and SPT multiwavelength data

    We perform a joint analysis of the counts of redMaPPer clusters selected from the Dark Energy Survey (DES) year 1 data and multiwavelength follow-up data collected within the 2500 deg2 South Pole Telescope (SPT) Sunyaev-Zel'dovich (SZ) survey. The SPT follow-up data, calibrating the richness-mass relation of the optically selected redMaPPer catalog

    Costanzi, M. et al.

    Advertised on:

    2
    2021
  • Electron-beam interaction with emission-line clouds in blazars

    Context. An electron-positron beam escaping from the magnetospheric vacuum gap of an accreting black hole interacts with recombination-line photons from surrounding gas clouds. Inverse-Compton scattering and subsequent pair production initiate unsaturated electromagnetic cascades exhibiting a characteristic spectral energy distribution. Aims: By

    Wendel, Christoph et al.

    Advertised on:

    2
    2021
  • Erratum: "The Spectral Evolution of the First Galaxies. III. Simulated James Webb Space Telescope Spectra of Reionization-epoch Galaxies with Lyman-continuum Leakage" (2017, ApJ, 836, 78)
    Zackrisson, Erik et al.

    Advertised on:

    2
    2021
  • Forbidden hugs in pandemic times. I. Luminous red nova AT 2019zhd, a new merger in M 31

    We present the follow-up campaign of the luminous red nova (LRN) AT 2019zhd, the third event of this class observed in M 31. The object was followed by several sky surveys for about five months before the outburst, during which it showed a slow luminosity rise. In this phase, the absolute magnitude ranged from Mr = -2.8 ± 0.2 mag to Mr = -5.6 ± 0.1

    Pastorello, A. et al.

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    2
    2021