Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Natasa Bon"'
Autor:
Deborah Dultzin, Paola Marziani, J. A. de Diego, C. A. Negrete, Ascensión Del Olmo, Mary L. Martínez-Aldama, Mauro D'Onofrio, Edi Bon, Natasa Bon, Giovanna M. Stirpe
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 6 (2020)
Quasars accreting matter at very high rates (known as extreme Population A [xA] quasars, possibly associated with super-Eddington accreting massive black holes) may provide a new class of distance indicators covering cosmic epochs from present day up
Externí odkaz:
https://doaj.org/article/de94c6eb2ad342a6bd9f8e8e599a447e
Autor:
Paola Marziani, Deborah Dultzin, Jack W. Sulentic, Ascensión Del Olmo, C. A. Negrete, Mary L. Martínez-Aldama, Mauro D'Onofrio, Edi Bon, Natasa Bon, Giovanna M. Stirpe
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 5 (2018)
The last 25 years saw a major step forward in the analysis of optical and UV spectroscopic data of large quasar samples. Multivariate statistical approaches have led to the definition of systematic trends in observational properties that are the basi
Externí odkaz:
https://doaj.org/article/89b9ba0edb2d4ad39f473248493726b5
Autor:
Paola Marziani, Edi Bon, Natasa Bon, Ascension del Olmo, Mary Loli Martínez-Aldama, Mauro D’Onofrio, Deborah Dultzin, C. Alenka Negrete, Giovanna M. Stirpe
Publikováno v:
Atoms, Vol 7, Iss 1, p 18 (2019)
Quasars accreting matter at very high rates (known as extreme Population A (xA) or super-Eddington accreting massive black holes) provide a new class of distance indicators covering cosmic epochs from the present-day Universe up to less than 1 Gyr fr
Externí odkaz:
https://doaj.org/article/0dcc280adfa4445d9dea58b6f9fe384e
Autor:
Paola Marziani, Ascensión del Olmo, Mary Loli Martínez-Aldama, Deborah Dultzin, Alenka Negrete, Edi Bon, Natasa Bon, Mauro D’Onofrio
Publikováno v:
Atoms, Vol 5, Iss 3, p 33 (2017)
Can high ionization lines such as CIV λ 1549 provide useful virial broadening estimators for computing the mass of the supermassive black holes that power the quasar phenomenon? The question has been dismissed by several workers as a rhetorical one
Externí odkaz:
https://doaj.org/article/ed07429f49ca48b08b4b4ae4102a98f8
Autor:
Paola Marziani, Ascensión del Olmo, C. Alenka Negrete, Deborah Dultzin, Enrico Piconcelli, Giustina Vietri, Mary Loli Martínez-Aldama, Mauro D’Onofrio, Edi Bon, Natasa Bon, Alice Deconto Machado, Giovanna M. Stirpe, Tania Mayte Buendia Rios
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the origina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0def64beec0c4864eb78e7b6e08d9fa2
Autor:
Paola Marziani, Alberto Floris, Alice Deconto-Machado, Swayamtrupta Panda, Marzena Sniegowska, Karla Garnica, Deborah Dultzin, Mauro D’Onofrio, Ascensión Del Olmo, Edi Bon, Nataša Bon
Publikováno v:
Physics, Vol 6, Iss 1, Pp 216-236 (2024)
The 4D (four-dimensional) eigenvector 1 (E1) sequence has proven to be a highly effective tool for organizing observational and physical properties of type-1 active galactic nuclei (AGNs). In this paper, we present multiple measurements of metallicit
Externí odkaz:
https://doaj.org/article/433f6c3d1e2040cebe8b3b58f1e07837
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 5 (2018)
Here we investigate the connection of broad emission line shapes and continuum light curve variability time scales of type-1 Active Galactic Nuclei (AGN). We developed a new model to describe optical broad emission lines as an accretion disk model of
Externí odkaz:
https://doaj.org/article/30d84feedd71475d9daac118d995964d
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 5 (2018)
Many active galactic nuclei (AGN) show strong variability of the optical continuum. Since the line flux, profile shapes and intensity ratios are changing, we analyze the variability patterns and possible periodicity of Type 1 AGN NGC 5548, using the
Externí odkaz:
https://doaj.org/article/7c652412cf824d678caa2bfbf851e8d9
Publikováno v:
Atoms, Vol 7, Iss 1, p 26 (2019)
The mechanism of the optical variability of active galactic nuclei (AGN) is still very puzzling. It is now widely accepted that the optical variability of AGN is stochastic, producing red noise-like light curves. In case they were to be periodic or q
Externí odkaz:
https://doaj.org/article/a099244ac03144839e6e6b1942d153f0