A dataset provided by the European Space Agency

Proposal ID 0220140
Obs ID 02201400001, 02201400003
Title Non-Thermal Hard X-Rays from Magnetically Active Stars
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0220140
DOI https://doi.org/10.57780/esa-nty1n8l
Author Guedel
Abstract Magnetically active stars are among the most ubiquitous high-energy sources in the observable sky,yet they have been studied predominantly in the soft X-ray range below 10 keV where thermalcoronal plasma is the predominant source of photons. However, both solar analogy and the signaturesof non-thermal radio and optical impulsive bursts from active stellar sources suggest the presence of a largepopulation of non-thermal electrons out to MeV energies. They are expected to produce a strong non-thermalbremsstrahlung continuum above 10-20 keV. We propose a novel investigation to search for non-thermalhard X-ray emission in stellar sources by simultaneously using the JEM-X (for soft X-rays), the IBIS/ISGRI(for non-thermal emission), and the OM instruments (for optical electron-induced bursts). Simultaneous radioobservations will detect enhanced production of non-thermal electron populations. Timing studiesbetween the different (thermal/non-thermal) components will indicate the nature of the hard X-rays.The results will be important to assess the role of accelerated particles in the primary energy releasein stellar coronae as well as their role in coronal heating.
Publications
Temporal Coverage 2004-02-28T23:34:32Z / 2004-08-04T06:50:48Z
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 2025-03-25T09:54:30Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Guedel, 2025, 'Non-Thermal Hard X-Rays from Magnetically Active Stars', 1.0, European Space Agency, https://doi.org/10.57780/esa-nty1n8l