Publicaciones

  • A detailed analysis of the Gl 486 planetary system

    Context. The Gl 486 system consists of a very nearby, relatively bright, weakly active M3.5 V star at just 8 pc with a warm transiting rocky planet of about 1.3 R⊕ and 3.0 M⊕. It is ideal for both transmission and emission spectroscopy and for testing interior models of telluric planets. Aims: To prepare for future studies, we aim to thoroughly

    Caballero, J. A. et al.

    Fecha de publicación:

    9
    2022
  • A Mass Model for the Lensing Cluster SDSS J1004+4112: Constraints from the Third Time Delay

    We have built a new model for the lens system SDSS J1004+4112 including the recently measured time delay of the fourth quasar image. This time delay has a strong influence on the inner mass distribution of the lensing cluster (ρ ∝ r -α ) allowing us to determine $\alpha ={1.18}_{-0.03(-0.18)}^{+0.02(+0.11)}$ at the 68% (95%) confidence level in

    Forés-Toribio, R. et al.

    Fecha de publicación:

    9
    2022
  • Development of Fast and Precise Scan Mirror Mechanism for an Airborne Solar Telescope

    We developed a scan mirror mechanism (SMM) that enable a slit-based spectrometer or spectropolarimeter to precisely and quickly map an astronomical object. The SMM, designed to be installed in the optical path preceding the entrance slit, tilts a folding mirror and then moves the reflected image laterally on the slit plane, thereby feeding a

    Oba, Takayoshi et al.

    Fecha de publicación:

    9
    2022
  • Effects of Spectral Resolution on Simple Magnetic Field Diagnostics of the Mg II H and K Lines

    We study the effects of finite spectral resolution on the magnetic field values retrieved through the weak-field approximation (WFA) from the cores of the Mg II h and k lines. The retrieval of the line-of-sight component of the magnetic field, B LOS, from synthetic spectra generated in a uniformly magnetized FAL-C atmosphere is accurate when

    Centeno, Rebecca et al.

    Fecha de publicación:

    9
    2022
  • Influence of Thomson Electron Scattering Redistribution on Spectral Line Polarization Formed in Spherically Symmetric Extended and Expanding Atmospheres

    Scattering of line photons by ambient electrons in thermal motion in the stellar atmosphere modifies the wings of both intensity and linear polarization profiles of the spectral lines. The aim of the present paper is to investigate in detail the influence of Thomson electron scattering redistribution on resonance line polarization formed in

    Sampoorna, M. et al.

    Fecha de publicación:

    9
    2022
  • StraKLIP: A Novel Pipeline for Detection and Characterization of Close-in Faint Companions through the Karhunen-Loéve Image Processing Algorithm

    We present a new pipeline developed to detect and characterize faint astronomical companions at small angular separation from the host star using sets of wide-field imaging observations not specifically designed for high-contrast imaging analysis. The core of the pipeline relies on Karhunen-Loéve truncated transformation of the reference point

    Strampelli, Giovanni M. et al.

    Fecha de publicación:

    10
    2022