Publications

  • Low-redshift quasars in the SDSS Stripe 82 - II. Associated companion galaxies and signature of star formation

    We present optical spectroscopy of the close companions of 22 low-redshift (z < 0.5) quasars (QSO) selected from a larger sample of QSO in the SDSS Stripe82 region for which both the host galaxy and the large-scale environments have been investigated in our previous work. The new observations extend the number of QSO studied in our previous paper

    Stone, M. B. et al.

    Advertised on:

    2
    2021
  • The dual nature of blazar fast variability: Space and ground observations of S5 0716+714

    Blazar S5 0716+714 is well-known for its short-term variability, down to intraday time-scales. We here present the 2-min cadence optical light curve obtained by the TESS space telescope in 2019 December-2020 January and analyse the object fast variability with unprecedented sampling. Supporting observations by the Whole Earth Blazar Telescope

    Raiteri, C. M. et al.

    Advertised on:

    2
    2021
  • Spectral characterization of the craters of Ryugu as observed by the NIRS3 instrument on-board Hayabusa2

    C-type rubble pile asteroid (162173) Ryugu was observed and characterized up close for a year and a half by the instruments on-board the Japanese Aerospace eXploration Agency (JAXA) Hayabusa2 spacecraft. The asteroid exhibits relatively homogeneous spectral characteristics at near-infrared wavelengths (~1.8-3.2 μm), including a very low reflectance

    Riu, Lucie et al.

    Advertised on:

    3
    2021
  • Complete framework for tau polarimetry in B →D<SUP>(*)</SUP>τ ν decays

    The meson decays B →D τ ν and B →D*τ ν are sensitive probes of the b →c τ ν transition. In this work, we present a complete framework to obtain the maximum information on the physics of B →D(*)τ ν with polarized τ leptons and unpolarized D(*) mesons. Focusing on the hadronic decays τ →π ν and τ →ρ ν , we show how to extract seven τ asymmetries from

    Asadi, Pouya et al.

    Advertised on:

    11
    2020
  • A statistical study of plasmoids associated with a post-CME current sheet

    Context. Coronal mass ejections (CMEs) are often observed to be accompanied by flare, current sheets, and plasmoids/plasma blobs. 2D and 3D numerical simulations and observations reported plasmoids moving upward as well as downward along the current sheet. Aims: We aim to investigate the properties of plasmoids observed in the current sheet formed

    Patel, Ritesh et al.

    Advertised on:

    12
    2020
  • Carbon-enhanced metal-poor stars enriched in s-process and r-process elements

    We present an on-going project consisting of analysis of a sample of twenty-five metal-poor stars, most of them carbon-enriched and thus tagged carbon-enhanced metal-poor (CEMP) stars, observed with the high-resolution HERMES spectrograph mounted on the Mercator telescope (La Palma), the UVES spectrograph on VLT (ESO Chile), or the HIRES

    Karinkuzhi, Drisya et al.

    Advertised on:

    12
    2020