Zobrazeno 1 - 10
of 21
pro vyhledávání: '"E. López-Navas"'
Autor:
Y. Diaz, L. Hernàndez-García, P. Arévalo, E. López-Navas, C. Ricci, M. Koss, O. Gonzalez-Martin, M. Baloković, N. Osorio-Clavijo, J. A. García, A. Malizia
Context. An interesting feature of active galactic nuclei (AGN) accreting at low rates is the weakness of the reflection features in their X-ray spectra, which may result from the gradual disappearance of the torus with decreasing accretion rates. It
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48416153acc36ca1d29ce789a9deab9b
https://resolver.caltech.edu/CaltechAUTHORS:20230314-844891400.8
https://resolver.caltech.edu/CaltechAUTHORS:20230314-844891400.8
Autor:
Patrícia da Silva, R B Menezes, Y Díaz, A Rodríguez-Ardila, E López-Navas, P Arévalo, L Hernández-García
The central regions of galaxies harbouring active galactic nuclei (AGNs) can be quite complex, especially at high activity, presenting, besides variability, a variety of phenomena related, e.g. to ionization/excitation mechanisms. A detailed study is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00cce075d650b12bbd72e815bda8321b
http://arxiv.org/abs/2212.11434
http://arxiv.org/abs/2212.11434
Autor:
E López-Navas, M L Martínez-Aldama, S Bernal, P Sánchez-Sáez, P Arévalo, Matthew J Graham, L Hernández-García, P Lira, P A Rojas Lobos
Determining the frequency and duration of changing--look (CL) active galactic nuclei (AGNs) phenomena, where the optical broad emission lines appear or disappear, is crucial to understand the evolution of the accretion flow around supermassive black
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b255138920f0256ca0efb52eb50d86b
Autor:
E López-Navas, P Arévalo, S Bernal, Matthew J Graham, L Hernández-García, P Lira, P Sánchez-Sáez
The scarce optical variability studies in spectrally classified Type 2 active galactic nuclei (AGNs) have led to the discovery of anomalous objects that are incompatible with the simplest unified models (UM). This paper focuses on the exploration of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5661b50f81e2566aa570849ba232765e
Akademický článek
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Autor:
E. López-Navas, Nathalie Degenaar, J. van den Eijnden, J. V. Hernández Santisteban, Aastha S. Parikh
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 493(1), 940-951. Oxford University Press
Accreting neutron stars and black holes in low-mass X-ray binaries (LMXBs) radiate across the electromagnetic spectrum. Linking the emission produced at different wavelengths can provide valuable information about the accretion process and any associ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1515b870cd28500a614cd6508de69b55
https://hdl.handle.net/10023/19705
https://hdl.handle.net/10023/19705
Akademický článek
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Autor:
M. Armas Padilla, E. López-Navas
The relatively small family of ultra-compact X-ray binary systems is of great interest for many areas of astrophysics. We report on a detailed X-ray spectral study of the persistent neutron star low mass X-ray binary 1RXS J170854.4-321857. We analyse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89b9c12aa17208f8f99826cba3293cb2
Akademický článek
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Autor:
Mercedes Prieto, E López-Navas
M87 has been identified as a displaced supermassive black hole (SMBH) candidate. We investigated this possibility by a temporal analysis of twelve Adaptive-Optics assisted-VLT and HST images spanning twenty years. We found that the centre of the isop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78c9ab115c768bdc0968d320b4270366
http://arxiv.org/abs/1808.04123
http://arxiv.org/abs/1808.04123