A dataset provided by the European Space Agency

Name: Nucleosynthesis in supernovae, positron containment, and particle acceleration, in Cas A and Tycho SNRs
Published: 2025-03-25T09:54:39Z

Proposal ID	1520002
Obs ID	15200020001, 15200020002, 15200020003
Title	Nucleosynthesis in supernovae, positron containment, and particle acceleration, in Cas A and Tycho SNRs
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:1520002
DOI	https://doi.org/10.57780/esa-2tbvl7c
Author	Diehl
Abstract	Cas A and Tycho are remnants of a core-collapse and a type Ia supernova explosion, respectively. Radioactive 44Ti has been observed from these two relatively young supernova remnants, and is believed to originate from the deep interiors of supernova explosions, representing physical conditions that are otherwise difficult to explore. 44Ti nucleosynthesis is assumed to occur in alpha-rich freeze-out from Si burning or NSE burning. The amount of 56Ni, which also is produced in the supernova interior, has been estimated indirectly; together, the 44Ti/56Ni ratio is a key diagnostic of the inner processes in a supernova explosion. Here we propose deep observations of the sky region including both Cassiopeia A and Tycho, in order to (1) advance Cas A 44Ti line results to sufficient quality for line shape and line ratio tests that reflect inner ejecta kinematics, and (2) obtain sufficient exposure for Tycho to confirm the 44Ti signal reported from other instruments in the hard X-ray range. The SWIFT detection of 44Ti from Tycho, a SN Ia remnant, adds to the puzzle of 44Ti synthesis and the origins of cosmic 44Ca. 44Ti deposits radioactive energy in nebular-phase supernova remnants through positrons, but the escape of positrons into interstellar space is an issue. Our planned observations will (3) constrain any local positron annihilation in the remnant itself, thus possibly explain the disk faintness in 511 keV gamma-rays. Young supernova remnants are also believed to be predominant sources of cosmic rays. Our observations aim (4) to search for direct evidence signs of local cosmic-rays within the remnants, such as nuclear de-excitation gamma-ray lines, and continuum emission from Bremsstrahlung.
Publications	AGILE and Konus-Wind Observations of GRB 190114C: The Remarkable Prompt and Early Afterglow Phases - Ursi, A., Tavani, M.,Frederiks, D. D.,Romani, M.,Verrecchia, F.,Marisaldi, M.,Aptekar, R. L.,Antonelli, L. A.,Argan, A.,Bulgarelli, A.,Barbiellini, G.,Caraveo, P.,Cardillo, M.,Casentini, C.,Cattaneo, P. W.,Chen, A.,Costa, E.,Donnarumma, I.,Evangelista, Y.,Feroci, M.,Ferrari, A.,Fuschino, F.,Galli, M.,Giuliani, A.,Labanti, C.,Lazzarotto, F.,Longo, F.,Lucarelli, F.,Morselli, A.,Paoletti, F.,Parmiggiani, N.,Piano, G.,Pilia, M.,Pittori, C.,Svinkin, D. S.,Trois, A.,Tsvetkova, A. E.,Vercellone, S.,Vittorini, V. (2020-12-01) http://ui.adsabs.harvard.edu/#abs/2020ApJ...904..133U An asymmetrical model for high-energy radiation of Cassiopeia A - Zhan, Shihong, Wang, Wei,Mou, Guobin,Li, Zhuo (2022-06-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.513.2471Z INTEGRAL Observations of Magnetars - Pacholski, Dominik Patryk, Ducci, Lorenzo,Topinka, Martin,Mereghetti, Sandro (2025-01-01) http://ui.adsabs.harvard.edu/#abs/2025AN....34640109P Jitter Radiation as an Alternative Mechanism for the Nonthermal X-Ray Emission of Cassiopeia A - Greco, Emanuele, Vink, Jacco,Ellien, Amael,Ferrigno, Carlo (2023-10-01) http://ui.adsabs.harvard.edu/#abs/2023ApJ...956..116G New insights on the massive interacting binary UU Cassiopeiae - Mennickent, R. E., Djurasevic, G.,Vince, I.,Garces, J.,Hadrava, P.,Cabezas, M.,Petrovic, J.,Jurkovic, M. I.,Korcakova, D.,Markov, H. (2020-10-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...642A.211M Search for Evolutionary Changes in the Periods of Cepheids: CF Cas - Berdnikov, L. N., Pastukhova, E. N. (2019-02-01) http://ui.adsabs.harvard.edu/#abs/2019AstL...45...92B Search for Evolutionary Changes in the Periods of the Cepheids CEa Cas and CEb Cas - Berdnikov, L. N., Belinskii, A. A.,Pastukhova, E. N.,Burlak, M. A.,Ikonnikova, N. P.,Mishin, E. O.,Shatskii, N. I. (2021-01-01) http://ui.adsabs.harvard.edu/#abs/2021AstL...47...28B Study of changes in the pulsation period of 148 Galactic Cepheid variables - Csornyei, G., Szabados, L.,Molnar, L.,Cseh, B.,Egei, N.,Kalup, Cs,Kecskemethy, V.,Konyves-Toth, R.,Sarneczky, K.,Szakats, R. (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.511.2125C ²⁶Al gamma rays from the Galaxy with INTEGRAL/SPI - Pleintinger, Moritz M. M., Diehl, Roland,Siegert, Thomas,Greiner, Jochen,Krause, Martin G. H. (2023-04-01) http://ui.adsabs.harvard.edu/#abs/2023A&A...672A..53P ⁴⁴Ti ejecta in young supernova remnants - Weinberger, Christoph, Diehl, Roland,Pleintinger, Moritz M. M.,Siegert, Thomas,Greiner, Jochen (2020-06-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...638A..83W
Temporal Coverage	2018-07-08T17:29:09Z / 2019-07-04T19:58:33Z
Version	1.0
Mission Description	The INTEGRAL (International Gamma-Ray Astrophysics Laboratory) mission, launched by the European Space Agency (ESA) on October 17, 2002, was designed to study high-energy phenomena in the universe. INTEGRAL was operating until february 2025 and it was equipped with three high-energy instruments: the Imager on Board the INTEGRAL Satellite (IBIS), the Spectrometer on INTEGRAL (SPI), and the JEM-X (Joint European Monitor for X-rays). Its Optical Monitoring Camera (OMC) provided optical V-band magnitude measurements, complementing the high-energy observations.
Creator Contact	https://www.cosmos.esa.int/web/integral/helpdesk
Date Published	2025-03-25T09:54:39Z
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Diehl, 2025, 'Nucleosynthesis in supernovae, positron containment, and particle acceleration, in Cas A and Tycho SNRs', 1.0, European Space Agency, https://doi.org/10.57780/esa-2tbvl7c