A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Measurement of the extragalactic background light using MAGIC and Fermi-LAT gamma-ray observations of blazars up to z=1
Tekijät: Acciari VA, Ansoldi S, Antonelli LA, Engels AA, Baack D, Babic A, Banerjee B, de Almeida UB, Barrio JA, Gonzalez JB, Bednarek W, Bellizzi L, Bernardini E, Berti A, Besenrieder J, Bhattacharyya W, Bigongiari C, Biland A, Blanch O, Bonnoli G, Busetto G, Carosi R, Ceribella G, Chai Y, Cikota S, Colak M, Colin U, Colombo E, Contreras JL, Cortina J, Covino S, D'Elia V, Da Vela P, Dazzi F, De Angelis A, De Lotto B, Delfino M, Delgado J, Di Pierro F, Espineira ED, Dominguez A, Prester DD, Dorner D, Doro M, Elsaesser D, Ramazani VF, Fattorini A, Fernandez-Barral A, Ferrara G, Fidalgo D, Foffano L, Fonseca MV, Font L, Fruck C, Galindo D, Gallozzi S, Lopez RJG, Garczarczyk M, Gasparyan S, Gaug M, Godinovic N, Green D, Guberman D, Hadasch D, Hahn A, Hassan T, Herrera J, Hoang J, Hrupec D, Inoue S, Ishio K, Iwamura Y, Kubo H, Kushida J, Lamastra A, Lelas D, Leone F, Lindfors E, Lombardi S, Longo F, Lopez M, Lopez-Coto R, Lopez-Oramas A, Fraga BMD, Maggio C, Majumdar P, Makariev M, Mallamaci M, Maneva G, Manganaro M, Mannheim K, Maraschi L, Mariotti M, Martinez M, Masuda S, Mazin D, Micanovic S, Miceli D, Minev M, Miranda JM, Mirzoyan R, Molina E, Moralejo A, Morcuende D, Moreno V, Moretti E, Munar-Adrover P, Neustroev V, Niedzwiecki A, Rosillo MN, Nigro C, Nilsson K, Ninci D, Nishijima K, Noda K, Nogues L, Nothe M, Paiano S, Palacio J, Palatiello M, Paneque D, Paoletti R, Paredes JM, Penil P, Peresano M, Persic M, Moroni PGP, Prandini E, Puljak I, Rhode W, Ribo M, Rico J, Righi C, Rugliancich A, Saha L, Sahakyan N, Saito T, Satalecka K, Schweizer T, Sitarek J, Snidaric I, Sobczynska D, Somero A, Stamerra A, Strom D, Strzys M, Suric T, Tavecchio F, Temnikov P, Terzic T, Teshima M, Torres-Alba N, Tsujimoto S, van Scherpenberg J, Vanzo G, Acosta MV, Vovk I, Will M, Zaric D
Kustantaja: OXFORD UNIV PRESS
Julkaisuvuosi: 2019
Journal: Monthly Notices of the Royal Astronomical Society
Tietokannassa oleva lehden nimi: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Lehden akronyymi: MON NOT R ASTRON SOC
Vuosikerta: 486
Numero: 3
Aloitussivu: 4233
Lopetussivu: 4251
Sivujen määrä: 19
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/stz943
Verkko-osoite: https://academic.oup.com/mnras/article/486/3/4233/5427920
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/41455490
We present a measurement of the extragalactic background light (EBL) based on a joint likelihood analysis of 32 gamma-ray spectra for 12 blazars in the redshift range z = 0.03-0.944, obtained by the MAGIC telescopes and Fermi-LAT. The EBL is the part of the diffuse extragalactic radiation spanning the ultraviolet, visible, and infrared bands. Major contributors to the EBL are the light emitted by stars through the history of the Universe, and the fraction of it that was absorbed by dust in galaxies and re-emitted at longer wavelengths. The EBL can be studied indirectly through its effect on very high energy photons that are emitted by cosmic sources and absorbed via gamma gamma interactions during their propagation across cosmological distances. We obtain estimates of the EBL density in good agreement with state-of-the-art models of the EBL production and evolution. The 1 sigma upper bounds, including systematic uncertainties, are between 13 per cent and 23 per cent above the nominal EBL density in the models. No anomaly in the expected transparency of the Universe to gamma-rays is observed in any range of optical depth. We also perform a wavelength-resolved EBL determination, which results in a hint of an excess of EBL in the 0.18-0.62 mu m range relative to the studied models, yet compatible with them within systematics.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
