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SUMMARY:SPACE seminar: Francesca Spinnato \; Virginia Cardillo
DTSTART:20260421T100000Z
DTEND:20260421T110000Z
DTSTAMP:20260530T131500Z
UID:indico-event-17471@indico.global
DESCRIPTION:Speaker 1: Francesca Spinnato (SSM)\nTitle 1: Canonical and no
 n-canonical symmetries in f(R) cosmology\nAbstract 1: The f(R)-gravity rep
 resents the most straightforward extension of the General Relativity. Amon
 g the different possible formulations\, the starting action can be selecte
 d using the Noether symmetry approach\, a phisically motivated criterion b
 ased on Noether's theorem aimed at identifying viable models that exhibit 
 symmetries. An advantage in applying such an approach is the reduction of 
 the dynamical system and the associated minisuperspace\, thus enabling the
  derivation of exact solutions to the equations of motion. In this study\,
  we consider the f(R) gravity in a cosmological context and study the cano
 nical and non canonical cases comparing the conserved quantities correspon
 ding to symmetries in the selected models. For the non canonical case\, we
  extend the Noether vector up to the second prolongation after finding out
  the transformation law for the second time derivative of fields that defi
 ne our minisuperspace. The main goal is to understand if there are some di
 fferences both in the solutions of the Noether system and the correspondin
 g conserved quantities comparing the two cases.\n-------------------------
 ------------------------------------------------\nSpeaker 2: Virginia Card
 illo (SSM)\nTitle 2: Precision laser positioning in space for satellite na
 vigation\, gravitation\, and exploration\nAbstract 2: The research propos
 al outlines the development and validation of advanced laser positioning m
 ethodologies intended to bridge the gap between fundamental gravitational 
 physics and high-precision Positioning\, Navigation\, and Timing (PNT) tec
 hnologies. As space exploration expands toward the Moon and Mars\, the dem
 and for autonomous and highly accurate navigation systems becomes critical
 . This project focuses on the utilization of Laser RetroReflectors (LRR)
 —developed at INFN-LNF—onboard the initial four satellites of ESA’s 
 Moonlight constellation\, which serves as the precursor to the "Lunar Gali
 leo" and the Lunar Communications and Navigation Services (LCNS).By integr
 ating the Planetary Ephemeris Program (PEP) in collaboration with the Moon
 LIGHT-2/CSN2 research group\, the study aims to refine orbital positioning
  through laser ranging observations from both Earth and lunar orbits. This
  approach allows for the definition of an optimal spatial metric essential
  for both engineering applications and gravitational measurements. The res
 earch adopts a multidisciplinary strategy\, combining numerical modeling\,
  mission simulations\, and optical data analysis to characterize LRR perfo
 rmance directly at INFN-LNF laboratories. The expected outcomes include in
 novative strategies for autonomous deep-space navigation and significant c
 ontributions to General Relativity testing\, laying the groundwork for fut
 ure lunar and Martian exploration infrastructures.\n----------------------
 ---------------------------------------------------\nZoom link: click here
 \n\nhttps://indico.global/event/17471/
LOCATION:Aula 4 (San Marcellino)
URL:https://indico.global/event/17471/
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