dc.contributor.author | Davids, Isak Delberth | |
dc.contributor.author | Böttcher, Markus | |
dc.contributor.author | Backes, Michael | |
dc.date.accessioned | 2019-08-02T11:06:36Z | |
dc.date.available | 2019-08-02T11:06:36Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Davids, I.D. et al. 2019. Centaurus A: hard x-ray and high-energy gamma-ray light curve correlation. Galaxies, 7(2): Article no 44. [https://doi.org/10.3390/galaxies7020044] | en_US |
dc.identifier.issn | 2075-4434 (Online) | |
dc.identifier.uri | http://hdl.handle.net/10394/33086 | |
dc.identifier.uri | https://www.mdpi.com/2075-4434/7/2/44/pdf | |
dc.identifier.uri | https://doi.org/10.3390/galaxies7020044 | |
dc.description.abstract | Centaurus A, powered by a 55 million solar mass supermassive black hole, has been intensively monitored in all accessible wavelength ranges of the electromagnetic spectrum. However, its very-high energy gamma ( γ ) ray flux (TeV photons), obtained from H.E.S.S. is relatively faint, hampering detailed light curve analyses in the most energetic energy band. Yet, the extensive long-term light curve data from Fermi-LAT and Swift-BAT (hard X-rays) allows for cross-correlation studies. We find a hint that X-ray emission from Centaurus A precedes the γ rays by 25±125 days. If this lag is real and related to a γγ absorption effect in the broad-line region (BLR) around the central source, we can constrain the size of the BLR using light-travel time arguments. These are first results of extended light curve correlation studies between high-energy γ rays and X-rays from Centaurus A | en_US |
dc.language.iso | en | en_US |
dc.publisher | MDPI | en_US |
dc.subject | Active galactic nucleus | en_US |
dc.subject | Radio galaxy | en_US |
dc.subject | Centaurus A | en_US |
dc.subject | GeV γ-rays | en_US |
dc.subject | TeV γ-rays | en_US |
dc.subject | Light curve | en_US |
dc.subject | Discrete correlation function | en_US |
dc.title | Centaurus A: hard x-ray and high-energy gamma-ray light curve correlation | en_US |
dc.type | Article | en_US |
dc.contributor.researchID | 13146629 - Davids, Isak Delberth | |
dc.contributor.researchID | 24420530 - Böttcher, Markus | |
dc.contributor.researchID | 28644743 - Backes, Michael | |