A dataset provided by the European Space Agency

Proposal ID 0420073
Obs ID 04200730002, 04200730003, 04200730004, 04200730005, 04200730006, 04200730007, 04200730008, 04200730009, 04200730010, 04200730011, 04200730012, 04200730013, 04200730014, 04200730015, 04200730016, 04200730017, 04200730018, 04200730019, 04200730020, 04200730021, 04200730022, 04200730023, 04200730024, 04200730025, 04200730026, 04200730027, 04200730028, 04200730029, 04200730030, 04200730031, 04200730032, 04200730033, 04200730034, 04200730035, 04200730036, 04200730037, 04200730038, 04200730039, 04200730040, 04200730041, 04200730042, 04200730043, 04200730044, 04200730045, 04200730046, 04200730047, 04200730048, 04200730049, 04200730050, 04200730051, 04200730052, 04200730053, 04200730054, 04200730055, 04200730056, 04200730057, 04200730058, 04200730059, 04200730060, 04200730061, 04200730062, 04200730063, 04200730064, 04200730065
Title Dissecting the Milky Way: Stellar Ridge, Cosmic Rays, Annihilation Radiation, Nucleosynthesis
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0420073
DOI https://doi.org/10.57780/esa-vzg0mcc
Author Sunyaev
Abstract We propose a VERY long (4-6 Msec) project of repeated latitude scans of a selected region of the Galactic Disk outside the central bulge. The rapid latitude scans are intended to minimize any possible systematics associated with the SPI and ISGRI detectors background variations, thus providing a clean emission spectrum of this portion of the Galactic disk, limited only by the photon counting statistics.The ultimate goal is to have a model independent measurements of the disk positron annihilation emission, 1.8 MeV Al26 and 1.17 MeV and 1.33 MeV Fe60 lines fluxes and a broad band spectrum of the Galactic Ridge emission, believed to be due to weak compact X-ray sources and Cosmic Rays at low and high energies respectively. The proposed strategy is the only reliable way to achieve these goals without hitting the systematics limit.A further comparison of these data with the existing deep observations of the central Galactic Bulge would address the most fundamental questions facing the INTEGRAL: i) clarify the role of stellar nucleosynthesis in the production of positrons and the relation between the Galactic Disk and Bulge, ii) place tight constraints on the fate of the positrons, iii) allow a detailed comparison between Al26 and Fe60 nuclear lines emission and star formation rate in the disk, iv) provide robust conclusion on the nature of the hard Ridge emission. As a secondary science we anticipate discovery of a number of new extragalactic objects in very interesting region of thelocal Universe -- the Great Attractor. The proposed observations making the best possible use of the INTEGRALcapabilities and will remain an extremely valuable source ofinformation on the High Energy properties of the Milky Way for decadesto come.
Publications
Temporal Coverage 2006-12-30T13:34:27Z / 2008-07-24T18:38:22Z
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 2025-03-25T09:54:34Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Sunyaev, 2025, 'Dissecting the Milky Way: Stellar Ridge, Cosmic Rays, Annihilation Radiation, Nucleosynthesis', 1.0, European Space Agency, https://doi.org/10.57780/esa-vzg0mcc