• Grammar evolution and symbolic regression for astrometric centering of Hubble Space Telescope images 

      Sarmiento, Ricardo; de la Cruz Echeandía, Marina; Ortega de la Puente, Alfonso; Baena-Gallé, Roberto; Girard, Terrence; Casetti-Dinescu, Dana; Cervantes-Rovira, Alejandro (2024)
      Symbolic regression, in general, and genetic models, in particular, are promising approaches to mathematical modeling in astrometry where it is not always clear which is the fittest analytic expression depending on the ...
    • Star Image Centering with Deep Learning. II. HST/WFPC2 Full Field of View 

      Casetti-Dinescu, Dana; Baena-Gallé, Roberto; Girard, Terrence; Cervantes-Rovira, Alejandro; Todeasa, Sebastian (Publications of the Astronomical Society of the Pacific, 2024)
      We present an expanded and improved deep-learning (DL) methodology for determining centers of star images on Hubble Space Telescope/Wide-Field Planetary Camera 2 (WFPC2) exposures. Previously, we demonstrated that our DL ...
    • Stellar Population Properties in the Stellar Streams around SPRC047 

      Laine, Seppo; Martínez-Delgado, David; Webb, Kristi; Akhlaghi, Mohammad; Baena-Gallé, Roberto; Paudel, Sanjaya; Stein, Michael; Erkal, Denis (The Astrophysical Journal, 2024)
      We have investigated the properties (e.g., age, metallicity) of the stellar populations of a ringlike tidal stellar stream (or streams) around the edge-on galaxy SPRC047 (z = 0.031) using spectral energy distribution (SED) ...