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17 results on '"Celli, Silvia"'

1. Probing Stellar Clusters from Gaia DR2 as Galactic PeVatrons: I -- Expected Gamma-ray and Neutrino Emission

Author

Mitchell, Alison M. W., Morlino, Giovanni, Celli, Silvia, Menchiari, Stefano, and Specovius, Andreas

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
Abstract

Young & massive stellar clusters (SCs) are a potential source of galactic cosmic rays up to very high energies as a result of two possible acceleration scenarios. Collective stellar winds from massive member stars form a wind-blown bubble with a termination shock (TS) at which particle acceleration to PeV energies may occur. Furthermore, shock acceleration may occur at SNRs expanding inside the bubble. By applying a model of CR acceleration at both the wind TS and SNR shocks to catalogues of known SCs derived from Gaia DR2, we identify the most promising targets to search for evidence of PeVatron activity. Predictions for the secondary fluxes of gamma-ray and neutrino emission are derived based on particle acceleration at the collective wind TS and the subsequent hadronic interactions with the surrounding medium. Predictions from our modelling under baseline and optimistic scenarios are compared to data, finding consistent results. We estimate the detection prospects for future gamma-ray and neutrino experiments. We find that degree-scale angular sizes of the wind-blown bubbles are typical, that may pose a challenge for experimental detection. A shortlist of the most promising candidates is provided, with an anticipated flux range. Of order 10 SCs may be detectable with future facilities, and 1-5 could be currently operating as PeVatrons. Of these, three gamma-ray detected SCs have data within our predicted range. Our model can consistently describe gamma-ray measurements of SC emission. Several further as-yet-undetected SCs offer promising targets for future observations, although the flux range allowed by our model can be large (> factor 10). The large angular size of the wind-blown bubble may lead to low surface brightness emission, worsening the problem of source confusion. Nevertheless, we discuss how further work will help to constrain SCs as PeVatron candidates. (abridged), Comment: Submitted to Astronomy and Astrophysics. 19 pages, 10 figures, 5 tables

Published
2024

2. Detection prospects of very and ultra high-energy gamma rays from extended sources with ASTRI, CTA, and LHAASO

Author

Celli, Silvia and Peron, Giada

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Context. The recent discovery of several ultra high-energy gamma-ray emitters in our Galaxy represents a significant advancement towards the characterisation of its most powerful accelerators. Nonetheless, in order to unambiguously locate the regions where the highest energy particles are produced and understand the responsible physical mechanisms, detailed spectral and morphological studies are required, especially given that most of the observed sources were found to be significantly extended. Aims. In these regards, pointing observations with the next-generation Imaging Atmospheric Cherenkov Telescopes, such as the Cherenkov Telescope Array (CTA) Observatory and the ASTRI Mini-Array (ASTRI), are expected to provide significant improvements. Here we aim to identify the most promising sources to target in future observations. Methods. For this purpose, we performed a comparative analysis of the expected performance of ASTRI and CTA, computing their differential sensitivities towards extended sources, and further explored their capabilities with respect to specific case studies, including follow-ups of existing gamma-ray source catalogues. Results. We find that almost all of the sources thus far detected by LHAASO-WCDA and in the H.E.S.S. Galactic Plane Survey will be in the reach of ASTRI and CTA with about 300 and 50 hours of exposure, respectively. For the highest energy emitters detected by LHAASO-KM2A, in turn, we provide a list of the most promising objects that would require further investigation. We additionally examined specific classes of sources in order to identify potentially detectable gamma-ray emitters, such as passive molecular clouds (i.e. illuminated by the cosmic-ray sea) and pulsars surrounded by a halo of runaway particles., Comment: Accepted for publication in A&A

Published
2024
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3. Mass and wind luminosity of young Galactic open clusters in Gaia DR2

Author

Celli, Silvia, Specovius, Andreas, Menchiari, Stefano, Mitchell, Alison, and Morlino, Giovanni

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics, High Energy Physics - Phenomenology
Abstract

Context. Star clusters constitute a significant part of the stellar population in our Galaxy. The feedback processes they exert on the interstellar medium impact multiple physical processes from the chemical to the dynamical evolution of the Galaxy. In addition, young and massive stellar clusters might act as efficient particle accelerators and contribute to the production of cosmic rays. Aims. We aim at evaluating the wind luminosity driven by the young (< 30 Myr) Galactic open stellar clusters observed by the Gaia space mission. This is crucial for determining the energy channeled into accelerated particles. Methods. To do this, we developed a method relying on the number, magnitude, and line-of-sight extinction of the stars observed per cluster. Assuming that the stellar mass function follows a Kroupa mass distribution and accounting for the maximum stellar mass allowed by the age and mass of the parent cluster, we conservatively estimated the mass and wind luminosity of 387 local clusters within the second data release of Gaia. Results. We compared the results of our computation with recent estimates of young cluster masses. With respect to these, our sample is three times more abundant, particularly above a few thousand solar masses. This is of the utmost relevance for predicting the gamma-ray emission resulting from the interaction of accelerated particles. The cluster wind luminosity distribution we obtained extends up to 3x10^38 erg/s. This is a promising feature in terms of potential particle acceleration scenarios., Comment: Accepted for publication in A&A

Published
2023
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4. The High Energy X-ray Probe (HEX-P): Galactic PeVatrons, star clusters, superbubbles, microquasar jets, and gamma-ray binaries

Author

Mori, Kaya, Reynolds, Stephen, An, Hongjun, Bamba, Aya, Krivonos, Roman, Tsuji, Naomi, Abdelmaguid, Moaz, Alford, Jason, Bangale, Priyadarshini, Celli, Silvia, Diesing, Rebecca, Eagle, Jordan, Fryer, Chris L., Gabici, Stefano, Gelfand, Joseph, Grefenstette, Brian, Garcia, Javier, Kim, Chanho, Kumar, Sajan, Kuznetsova, Ekaterina, Mac Intyre, Brydyn, Madsen, Kristin, Manconi, Silvia, Motogami, Yugo, Ohsumi, Hayato, Olmi, Barbara, Park, Jaegeun, Ponti, Gabriele, Sato, Toshiki, Shang, Ruo-Yu, Stern, Daniel, Terada, Yukikatsu, Woo, Jooyun, Younes, George, and Zoglauer, Andreas

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging (<10" FWHM) and broad spectral coverage (0.2-80 keV) with an effective area far superior to current facilities (including XMM-Newton and NuSTAR) to enable revolutionary new insights into a variety of important astrophysical problems. With the recent discoveries of over 40 ultra-high-energy gamma-ray sources (detected above 100 TeV) and neutrino emission in the Galactic Plane, we have entered a new era of multi-messenger astrophysics facing the exciting reality of Galactic PeVatrons. In the next decade, as more Galactic PeVatrons and TeV gamma-ray sources are expected to be discovered, the identification of their acceleration and emission mechanisms will be the most pressing issue in both particle and high-energy astrophysics. In this paper, along with its companion papers (Reynolds et al. 2023, Mori et al. 2023), we will present that HEX-P is uniquely suited to address important problems in various cosmic-ray accelerators, including Galactic PeVatrons, through investigating synchrotron X-ray emission of TeV-PeV electrons produced by both leptonic and hadronic processes., Comment: 31 pages, 12 figures, submitted to FrASS

Published
2023

8. The Power Board of the KM3NeT Digital Optical Module: Design, Upgrade, and Production

Author

Aiello, Sebastiano, primary, Albert, Arnauld, additional, Garre, Sergio, additional, Aly, Zineb, additional, Ambrosone, Antonio, additional, Ameli, Fabrizio, additional, Andre, Michel, additional, Androutsou, Eleni, additional, Anguita, Mancia, additional, Aphecetche, Laurent, additional, Ardid, Miguel, additional, Ardid, Salva, additional, Atmani, Hicham, additional, Aublin, Julien, additional, Badaracco, Francesca, additional, Bailly-Salins, Louis, additional, Bardacova, Zuzana, additional, Baret, Bruny, additional, Bariego, Adriana, additional, Du Pree, Suzan, additional, Becherini, Yvonne, additional, Bendahman, Meriem, additional, Benfenati, Francesco, additional, Benhassi, Marouane, additional, Benoit, David, additional, Berbee, Edward, additional, Bertin, Vincent, additional, Biagi, Simone, additional, Boettcher, Markus, additional, Bonanno, Danilo, additional, Boumaaza, Jihad, additional, Bouta, Mohammed, additional, Bouwhuis, Mieke, additional, Bozza, Cristiano, additional, Bozza, Riccardo, additional, Branzas, Horea, additional, Bretaudeau, Felix, additional, Bruijn, Ronald, additional, Brunner, Jurgen, additional, Bruno, Riccardo, additional, Buis, Ernst, additional, Buompane, Raffaele, additional, Busto, Jose, additional, Caiffi, Barbara, additional, Calvo, David, additional, Campion, Stefano, additional, Capone, Antonio, additional, Carenini, Francesco, additional, Carretero, Víctor, additional, Cartraud, Théophile, additional, Castaldi, Paolo, additional, Cecchini, Vincent, additional, Celli, Silvia, additional, Cerisy, Luc, additional, Chabab, Mohamed, additional, Chadolias, Michael, additional, Champion, Cèdric, additional, Chen, Andrew, additional, Cherubini, Silvio, additional, Chiarusi, Tommaso, additional, Circella, Marco, additional, Cocimano, Rosanna, additional, Coelho, João, additional, Coleiro, Alexis, additional, Colonges, Stephane, additional, Coniglione, Rosa, additional, Coyle, Paschal, additional, Creusot, Alexandre, additional, Cuttone, Giacomo, additional, Dallier, Richard, additional, Darras, Yara, additional, De Benedittis, Antonio, additional, de Jong, Maarten, additional, de Jong, Paul, additional, De Martino, Bianca, additional, de Wolf, Els, additional, Decoene, Valentin, additional, Del Burgo, Riccardo, additional, Del Rosso, Ilaria, additional, Di Cerbo, Umberto, additional, Di Mauro, Letizia, additional, Di Palma, Irene, additional, Diaz, Antonio, additional, Martín, Cristian, additional, Diego-Tortosa, Dídac, additional, Distefano, Carla, additional, Domi, Alba, additional, Donzaud, Corinne, additional, Dornic, Damien, additional, Dörr, Manuel, additional, Drakopoulou, Evangelia, additional, Drouhin, Doriane, additional, Dvornický, Rastislav, additional, Eberl, Thomas, additional, Eckerova, Eliska, additional, Eddymaoui, Ahmed, additional, Eff, Maximilian, additional, El Bojaddaini, Imad, additional, El Hedri, Sonia, additional, Enzenhöfer, Alexander, additional, Ferrara, Giovanna, additional, Filipovic, Miroslav, additional, Filippini, Francesco, additional, Franciotti, Dino, additional, Antonio Fusco, Luigi, additional, Gabella, Omar, additional, Gabriel, Jean-Louis, additional, Gagliardini, Silvia, additional, Gal, Tamas, additional, García Méndez, Juan, additional, Garcia Soto, Alfonso, additional, Oliver, Clara, additional, Geißelbrecht, Nicole, additional, Ghaddari, Houria, additional, Gialanella, Lucio, additional, Gibson, Brad, additional, Giorgio, Emidio, additional, Goos, Isabel, additional, Goswami, Pranjupriya, additional, Goupilliere, Damien, additional, Gozzini, Sara, additional, Gracia, Rodrigo, additional, Graf, Kay, additional, Guidi, Carlo, additional, Guillon, Benoît, additional, Gutiérrez, Miguel, additional, Heijboer, Aart, additional, Hekalo, Amar, additional, Hennig, Lukas, additional, Hernandez-Rey, Juan-Jose, additional, Ibnsalih, Walid, additional, Illuminati, Giulia, additional, Jansweijer, Peter, additional, Jung, Bouke, additional, Kalaczyński, Piotr, additional, Kalekin, Oleg, additional, Katz, Uli, additional, Khatun, Amina, additional, Kistauri, Giorgi, additional, Kopper, Claudio, additional, Kouchner, Antoine, additional, Kueviakoe, Vincent, additional, Kulikovskiy, Vladimir, additional, Kvatadze, Ramaz, additional, Labalme, Marc, additional, Lahmann, Robert, additional, Larosa, Giuseppina, additional, Lastoria, Chiara, additional, Lazo, Alfonso, additional, Le Stum, Sebastien, additional, Lehaut, Grégory, additional, Leonora, Emanuele, additional, Lessing, Nadja, additional, Levi, Giuseppe, additional, Clark, Miles, additional, Litrico, Pietro, additional, Longhitano, Fabio, additional, Mańczak, Jerzy, additional, Majumdar, Jhilik, additional, Malerba, Leonardo, additional, Mamedov, Fadahat, additional, Manfreda, Alberto, additional, Marconi, Martina, additional, Margiotta, Annarita, additional, Marinelli, Antonio, additional, Markou, Christos, additional, Martin, Lilian, additional, Martínez-Mora, Juan, additional, Marzaioli, Fabio, additional, Mastrodicasa, Massimo, additional, Mastroianni, Stefano, additional, Miccichè, Sandra, additional, Miele, Gennaro, additional, Migliozzi, Pasquale, additional, Migneco, Emilio, additional, Minutoli, Saverio, additional, Mitsou, Maria, additional, Mollo, Carlos, additional, Gallegos, Lizeth, additional, Morga, Michele, additional, Moussa, Abdelilah, additional, Mateo, Ivan, additional, Muller, Rasa, additional, Musico, Paolo, additional, Musone, Maria, additional, Musumeci, Mario, additional, Navas, Sergio, additional, Nayerhoda, Amid, additional, Nicolau, Carlo, additional, Nkosi, Bhuti, additional, Fearraigh, Brían, additional, Oliviero, Veronica, additional, Orlando, Angelo, additional, Oukacha, Enzo, additional, Paesani, Daniele, additional, González, Juan, additional, Papalashvili, Gogita, additional, Parisi, Vittorio, additional, Pastor, Emilio, additional, Paun, Alice, additional, Pavalas, Gabriela, additional, Pellegrini, Giuliano, additional, Martinez, Santiago, additional, Perrin-Terrin, Mathieu, additional, Perronnel, Jerome, additional, Pestel, Valentin, additional, Pestes, Rebekah, additional, Piattelli, Paolo, additional, Poirè, Chiara, additional, Popa, Vlad, additional, Pradier, Thierry, additional, Prado, Jorge, additional, Pulvirenti, Sara, additional, Quemener, Gilles, additional, Quiroz, Carlos, additional, Rahaman, Ushak, additional, Randazzo, Nunzio, additional, Randriatoamanana, Richard, additional, Razzaque, Soebur, additional, Rea, Immacolata, additional, Real, Diego, additional, Riccobene, Giorgio, additional, Robinson, Joshua, additional, Romanov, Andrey, additional, Saina, Adrian, additional, Greus, Francisco, additional, Samtleben, Dorothea, additional, Losa, Agustín, additional, Sanfilippo, Simone, additional, Sanguineti, Matteo, additional, Santonastaso, Claudio, additional, Santonocito, Domenico, additional, Sapienza, Piera, additional, Schmelling, Jan-Willem, additional, Schnabel, Jutta, additional, Schumann, Johannes, additional, Schutte, Hester, additional, Seneca, Jordan, additional, Sennan, Nour-Eddine, additional, Setter, Bastian, additional, Sgura, Irene, additional, Shanidze, Rezo, additional, Sharma, Ankur, additional, Shitov, Yury, additional, Šimkovic, Fedor, additional, Simonelli, Andreino, additional, Sinopoulou, Anna, additional, Smirnov, Mikhail, additional, Spisso, Bernardino, additional, Spurio, Maurizio, additional, Stavropoulos, Dimitris, additional, Štekl, Ivan, additional, Taiuti, Mauro, additional, Tayalati, Yahya, additional, Thiersen, Hannes, additional, Melo, Iara, additional, Tragia, Efi, additional, Trocme, Benjamin, additional, Tsourapis, Vasileios, additional, Tzamariudaki, Ekaterini, additional, Vacheret, Antonin, additional, Melchor, Angel, additional, Valsecchi, Veronica, additional, van Beveren, Vincent, additional, van Eeden, Thijs, additional, van Eijk, Daan, additional, Van Elewyck, Véronique, additional, van Haren, Hans, additional, Vannoye, Godefroy, additional, Vasileiadis, George, additional, De Sola, Francisco, additional, Verilhac, Cedric, additional, Veutro, Alessandro, additional, Viola, Salvatore, additional, Vivolo, Daniele, additional, Wilms, Joern, additional, Ramirez, Harold, additional, Zarpapis, Giorgos, additional, Zavatarelli, Sandra, additional, Zegarelli, Angela, additional, Zito, Daniele, additional, de Dios Zornoza, Juan, additional, Zuñiga, Juan, additional, and Zywucka, Natalia, additional

Published
2024
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9. TeV emission from Gamma Ray Bursts, checking the hadronic model

Author

Guetta Dafne, Gagliardini Silvia, Celli Silvia, Zegarelli Angela, Capone Antonio, Campion Stefano, and DiPalma Irene

Subjects
Physics, QC1-999
Abstract

Gamma-Ray Bursts (GRBs) are the most luminous explosions in the Universe. Their luminous prompt emission makes them detectable from cosmological distances. Most GRBs have been detected below a few MeV, however at least a hundred GRBs have been detected at high (0.1 GeV) energies and observed up to tens of GeV with the Fermi Large Area Telescope (LAT). Some GRBs have been observed at (0.1–1) TeV by ground-based imaging atmospheric Cherenkov telescopes. To date, the high energy emission mechanism is not understood. In this paper we review the possible leptonic and hadronic mechanisms capable of producing the ∼ TeV emission detected in GRBs. In paricular we concentrate on the hadronic origin of this radiation component and discuss in detail the numerical simulation elaborated to reproduce the observed sub-TeV observations of GRB190114C.

Published
2023
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10. Neutrino predictions from choked Gamma-Ray Bursts and comparison with the observed cosmic diffuse neutrino flux

Author

Zegarelli Angela, Fasano Michela, Celli Silvia, Guetta Dafne, Capone Antonio, and Di Palma Irene

Subjects
Physics, QC1-999
Abstract

The strong constraints from the Fermi-LAT data on the isotropic gamma-ray background suggest that the neutrinos observed by IceCube might possibly come from sources that are hidden to gamma-ray observations. A possibility emerged in recent years is that neutrinos may come from jets of collapsing massive stars which fail to break out of the stellar envelope, and for this reason they are known as choked jets, or choked Gamma-Ray Bursts (GRBs). We here show our predictions of neutrino flux and spectrum expected from these sources, focusing on Type II SNe, through detailed calculations of pγ interactions and accounting for all the neutrino production channels and scattering angles. We provide predictions of expected event rates for ANTARES, IceCube, and the next generation neutrino telescope KM3NeT.We also compute the contribution of the choked GRB population to the diffuse astrophysical neutrino flux, thus providing constraints on the local rate of this source population as to reproduce the observed neutrino flux.

Published
2023
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11. The high energy X-ray probe (HEX-P): Galactic PeVatrons, star clusters, superbubbles, microquasar jets, and gamma-ray binaries

Author

Mori, Kaya, primary, Reynolds, Stephen, additional, An, Hongjun, additional, Bamba, Aya, additional, Krivonos, Roman, additional, Tsuji, Naomi, additional, Abdelmaguid, Moaz, additional, Alford, Jason, additional, Bangale, Priyadarshini, additional, Celli, Silvia, additional, Diesing, Rebecca, additional, Eagle, Jordan, additional, Fryer, Chris L., additional, Gabici, Stefano, additional, Gelfand, Joseph, additional, Grefenstette, Brian, additional, Garcia, Javier, additional, Kim, Chanho, additional, Kumar, Sajan, additional, Kuznetsova, Ekaterina, additional, Mac Intyre, Brydyn, additional, Madsen, Kristin, additional, Manconi, Silvia, additional, Motogami, Yugo, additional, Ohsumi, Hayato, additional, Olmi, Barbara, additional, Park, Jaegeun, additional, Ponti, Gabriele, additional, Sato, Toshiki, additional, Shang, Ruo-Yu, additional, Stern, Daniel, additional, Terada, Yukikatsu, additional, Woo, Jooyun, additional, Younes, George, additional, and Zoglauer, Andreas, additional

Published
2023
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13. Follow-up of multi-messenger alerts with the KM3NeT ARCA and ORCA detectors

Author

Palacios Gonzalez, Juan, primary, Celli, Silvia, additional, Dornic, Damien, additional, Filippini, Francesco, additional, Le Guirriec, Emmanuel, additional, de Favereau de Jeneret, Jérôme, additional, Illuminati, Giulia, additional, Lamoureux, Mathieu, additional, Mastrodicasa, Massimo, additional, Muller, Rasa, additional, Salesa Greus, Francisco, additional, Sánchez Losa, Agustín, additional, Le Stum, Sebastien, additional, Vannoye, Godefroy, additional, Veutro, Alessandro, additional, and Zegarelli, Angela, additional

Published
2023
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16. On the mass and wind luminosity of young Galactic open clusters in Gaia DR2

Author

Celli, Silvia, Specovius, Andreas, Menchiari, Stefano, Mitchell, Alison, Morlino, Giovanni, Celli, Silvia, Specovius, Andreas, Menchiari, Stefano, Mitchell, Alison, and Morlino, Giovanni

Abstract

Context. Star clusters constitute a relevant part of the stellar population in our Galaxy. The feedback processes they exert on the interstellar medium impact multiple physical processes, from the chemical to the dynamical evolution of the Galaxy. In addition, young and massive stellar clusters might act as efficient particle accelerators, possibly contributing to the production of cosmic rays. Aims. We aim at evaluating the wind luminosity driven by the young (< 30 Myr) Galactic open stellar clusters observed by the Gaia space mission, which is crucial to determine the energy channeled into accelerated particles. Methods. To this extent, we develop a method relying on the number, magnitude and line-of-sight extinction of the stars observed per cluster. Assuming that the stellar mass function follows a Kroupa mass distribution, and accounting for the maximum stellar mass allowed by both the parent cluster age and mass, we conservatively estimate the mass and wind luminosity of 387 local clusters within the second data release of Gaia. Results. We compare the results of our computation with recent estimations of young cluster masses. With respect to these, we provide a sample three times more abundant, particularly above a few thousand solar masses, which is of the utmost relevance for predicting the gamma-ray emission resulting from the interaction of accelerated particles. In fact, the cluster wind luminosity distribution we obtain is found to extend up to 3 x 10^38 erg/s, a promising feature in terms of potential particle acceleration scenarios., Comment: 11 pages, 16 figures, comments are welcome

Published
2023

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