Investigation of high energy and plasma astrophysics phenomena, installation of the ASTRI-Mini Array & construction of the Cherenkov Telescope Array Small Size Telescopes (CTA-SSTs)

• Grant number: 21/02120-0
• Support Opportunities: Special Projects
• Start date: August 01, 2023
• End date: July 31, 2028
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Astronomical Instrumentation
• Principal Investigator: Elisabete Maria de Gouveia Dal Pino
• Grantee: Elisabete Maria de Gouveia Dal Pino
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Pesquisadores principais: Adriana Benetti Marques Valio ; Diego Antonio Falceta Gonçalves
• Associated researchers: Anderson Caproni ; Antônio Mário Magalhães ; Germán Lugones ; Grzegorz Kowal ; Paramita Barai ; Reinaldo Santos de Lima ; Rodrigo Nemmen da Silva ; Vera Jatenco Silva Pereira
• Associated scholarship(s): 25/12393-4 - Characterization of stellar activity through spot mapping, BP.IC; 24/21854-2 - Star formation, MHD turbulence, and high energy phenomena interlinks, BP.PD; 24/09383-4 - High Energy Processes around Black Holes and Jets, BP.PD; 24/05459-6 - Studies of Physical and Radiative Processes around Black Holes with Magnetohydrodynamical Simulations and Artificial Intelligence: Preparing for the Cherenkov Telescope Array and the ASTRI Mini-Array, BP.DD; 23/10590-1 - Magnetic reconnection, and particle acceleration and propagation around black holes, BP.DD

Abstract

The visible matter in the Universe is predominantly in a plasma state, i.e., it is composed of magnetized and ionized or partially ionized gas. The High Energy and Plasma Astrophysics group (GAPAE) at IAG-USP, having as partners researchers of CRAAM, EACH-USP and UFABC, has been exploring, for more than two decades, fundamental plasmas and high energy processes in astrophysical sources, using theoretical and numerical magneto-hydrodynamics (MHD) fluid description, as well as observational tools. These fundamental processes encompass particle acceleration, turbulence, magnetic reconnection, MHD shocks, instabilities, origin and amplification of cosmic magnetic fields, and non-thermal emission, applied to vast astrophysical framework from compact objects to clusters of galaxies. Such studies demand high performance computation (HPC) and continuous development of new numerical techniques and sophisticated multidimensional codes, which in turn have required continuous upgrade of our computational resources. These studies also drove our group into the Cherenkov Telescope Array (CTA) Project, an international collaboration (involving 31 countries) aiming at the construction of the world's largest ground-based gamma-ray observatory, covering the full sky with a northern array located at La Palma (Spain) and a southern array at Paranal (Chile). CTA will provide major advances to astrophysics, cosmology, and astroparticle physics, on the investigation of cosmic ray accelerators, cosmic magnetic fields, the physics of compact objects, and the origin of dark matter, all topics closely connected with our research. Our main contribution to this Project has been the development and construction of the ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana) MINI-ARRAY, in partnership with the Italian team of CTA. This is a CTA PRECURSOR composed of nine telescopes, that will be soon installed in the Canarian Islands, with operation expected to start around 2024. This thematic proposal aims to request funding to continue to support the CTA, the ASTRI Mini-Array, and our research activities. It is nestled in a broader international effort to build the CTA, now in its construction phase. CTA will have telescopes of three distinct sizes, the Large, Medium, and Small size telescopes (LST, MST, and SST, respectively), and the ASTRI telescope is the SST prototype that has been chosen (out of two other prototypes) to be the SST structure of the CTA, putting the ASTRI team as protagonist of the next steps of the Project development. The production of 37 SSTs telescopes is foreseen in the first phase of CTA construction, and we here request funding to manufacture in Brazil the optical segment support structure of the primary mirror (M1) of 40 SSTs (including 3 spare samples), with the technology that we helped to develop. Furthermore, in view of our extensive numerical studies, we also request funding for an upgrade of our computational facilities. This project extends the work already supported by FAPESP in our previous thematic projects (97/13084-3, 2006/50654-3, and particularly 13/10559-5). Our participation in the next steps of the CTA construction, will ensure to the Brazilian members a solid involvement in the SST Consortium. CTA is recognized among the three more important Astronomy Projects in Brazil and in the SPANET (São Paulo Astronomy Network). Furthermore, the upgrade of our computational facilities will make possible the continuation of the extensive numerical studies that we are performing with our graduate and under-graduate students, postdocs and several collaborators worldwide. The overall activities include the production of the optical support structures for CTA SSTs, participation in AIV activities, Science development, and data analyses both for the ASTRI and CTA, as well as preparation of students, and postdocs on theoretical and observational skills. (AU)

Scientific publications

(9)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

HUSSAIN, SAQIB; DAL PINO, ELISABETE M. DE GOUVEIA; PAGLIAROLI, GIULIA. Neutrinos and Gamma Rays from Galaxy Clusters Constrained by the Upper Limits of IceCube. ASTROPHYSICAL JOURNAL, v. 960, n. 2, p. 5-pg., 2024-01-01. (13/10559-5, 21/02120-0)

SIMOES, PAULO J. A.; ARAUJO, ALEXANDRE; VALIO, ADRIANA; FLETCHER, LYNDSAY. Hydrogen recombination continuum as the radiative model for stellar optical flares. Monthly Notices of the Royal Astronomical Society, v. 528, n. 2, p. 6-pg., 2024-01-30. (18/04055-8, 22/15700-7, 21/02120-0)

ARAUJO, ALEXANDRE; VALIO, ADRIANA. Dependence of Stellar Differential Rotation on Effective Temperature and Rotation: An Analysis from Starspot Transit Mapping. ASTROPHYSICAL JOURNAL, v. 956, n. 2, p. 6-pg., 2023-10-01. (18/04055-8, 21/02120-0)

DAL PINO, E. M. DE GOUVEIA; RODRIGUEZ-RAMIREZ, J. C.; DEL VALLE, M. V.. Multimessenger emission from magnetic reconnection in blazar jets: the case of TXS 0506+056. Monthly Notices of the Royal Astronomical Society, v. 537, n. 4, p. 13-pg., 2025-02-27. (13/10559-5, 17/12188-5, 19/05757-9, 21/02120-0, 20/08729-3)

VALIO, ADRIANA; DA SILVA, DOUGLAS F.; LI, HUI. Particle Acceleration in Solar Flares From Radio and Hard X-Ray Spectra. ASTRONOMISCHE NACHRICHTEN, v. N/A, p. 7-pg., 2024-12-22. (18/04055-8, 21/02120-0)

MENEZES, FABIAN; ARAUJO, ALEXANDRE; VALIO, ADRIANA. Probing the magnetic fields of starspots with transit mapping. Astronomy & Astrophysics, v. 691, p. 5-pg., 2024-11-08. (18/04055-8, 21/02120-0, 22/12024-0)

VALIO, ADRIANA; ARAUJO, ALEXANDRE; MENEZES, FABIAN. Differential Rotation of CoRoT Stars and a Kepler Binary Star from Starspot Transit Mapping. ASTROPHYSICAL JOURNAL, v. 972, n. 1, p. 9-pg., 2024-09-01. (18/04055-8, 21/02120-0)

ARAUJO, ALEXANDRE; LIMA, CIRIA; MENEZES, FABIAN; VALIO, ADRIANA. Starspot Area Coverage: Correlation with Age and Spectral Type in FGK and M Stars. Astrophysical Journal Letters, v. 985, n. 2, p. 7-pg., 2025-06-01. (22/12024-0, 18/04055-8, 21/02120-0)

CLAVIJO-BOHORQUEZ, WILLIAM E.; DAL PINO, ELISABETE M. DE GOUVEIA; MELIOLI, CLAUDIO. Role of AGN and star formation feedback in the evolution of galaxy outflows. Monthly Notices of the Royal Astronomical Society, v. 535, n. 2, p. 25-pg., 2024-11-13. (13/10559-5, 13/10559-5, 09/54006-4, 21/02120-0)