Zobrazeno 1 - 10
of 287
pro vyhledávání: '"Dultzin, D"'
We test the usefulness of the intermediate ionisation lines AlIII 1860 and CIII] 1909 as reliable virial mass estimators for quasars. We identify a sample of 309 quasars from the SDSS DR16 in the redshift range 1.2 < z < 1.4 to have [OII] 3728 record
Externí odkaz:
http://arxiv.org/abs/2209.05526
Autor:
González-Otero, M., Padilla-Torres, C. P., Cepa, J., González, J. J., Bongiovanni, Á., García, A. M. Pérez, González-Serrano, J. I., Alfaro, E., Avila-Reese, V., Benítez, E., Binette, L., Cerviño, M., Cruz-González, I., de Diego, J. A., Gallego, J., Hernández-Toledo, H., Krongold, Y., Lara-López, M. A., Nadolny, J., Pérez-Martínez, R., Pović, M., Sánchez-Portal, M., Cedrés, B., Dultzin, D., Jiménez-Bailón, E., Martínez, R. Navarro, Negrete, C. A., Pintos-Castro, I., Valenzuela, O.
Publikováno v:
A&A 669, A85 (2023)
Context. Extragalactic surveys are a key tool for better understanding the evolution of galaxies. Both deep and wide-field surveys serve to provide a clearer emerging picture of the physical processes that take place in and around galaxies, and to id
Externí odkaz:
http://arxiv.org/abs/2208.02828
Autor:
Marziani, P., del Olmo, A., Negrete, C. A., Dultzin, D., Piconcelli, E., Vietri, G., Martinez-Aldama, M. L., D'Onofrio, Mauro, Bon, E., Bon, N., Machado, A. Deconto, Stirpe, G. M., Rios, T. Buendia
The identification of a virial broadening estimator in the quasar UV rest frame suitable for black hole mass computation at high redshift has become an important issue. We compare the HI Balmer H-beta line width to the ones of two intermediate ioniza
Externí odkaz:
http://arxiv.org/abs/2205.07034
Autor:
Marziani, P., Bon, E., Bon, N., D'Onofrio, M., Punsly, B., Sniegowska, M., Czerny, B., Panda, S., Aldama, M. L. Martinez, del Olmo, A., Deconto-Machado, A., Negrete, C. A., Dultzin, D., Buendia, T., Garnica, K.
The last few years have seen the confirmation of several trends associated with the quasar main sequence. The idea of a main sequence for quasars is relatively recent, and its full potential for the observational classification and contextualization
Externí odkaz:
http://arxiv.org/abs/2111.04140
Autor:
Czerny, B., Martínez-Aldama, M. L., Wojtkowska, G., Zajaček, M., Marziani, P., Dultzin, D., Naddaf, M. H., Panda, S., Prince, R., Przyluski, R., Ralowski, M., Śniegowska, M.
Recent measurements of the parameters of the Concordance Cosmology Model ($\Lambda$CDM) done in the low-redshift Universe with Supernovae Ia/Cepheids, and in the distant Universe done with Cosmic Microwave Background (CMB) imply different values for
Externí odkaz:
http://arxiv.org/abs/2011.12375
Autor:
Marziani, P., Dultzin, D., Del Olmo, A., D'Onofrio, M., de Diego, J. A., Stirpe, G. M., Bon, E., Bon, N., Czerny, B., Perea, J., Panda, S., Martinez-Aldama, M. L., Negrete, C. A.
The main sequence offers a method for the systematization of quasar spectral properties. Extreme FeII emitters (or extreme Population A, xA) are believed to be sources accreting matter at very high rates. They are easily identifiable along the quasar
Externí odkaz:
http://arxiv.org/abs/2002.07219
Autor:
Dultzin, D., Marziani, P., de Diego, J. A., Negrete, C. A., Del Olmo, A., Martínez-Aldama, M. L., D'Onofrio, M., Bon, E., Bon, N., Stirpe, G. M.
Publikováno v:
Front. Astron. Space Sci. 6:80 (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:
http://arxiv.org/abs/2001.10368
Autor:
Bon, N., Marziani, P., Bon, E., Negrete, C. A., Dultzin, D., del Olmo, A., D'Onofrio, M., Martinez-Aldama, M. L.
Publikováno v:
A&A 635, A151 (2020)
The quasar class of extreme Population A (xA) (also known as super-Eddington accreting massive black holes, SEAMBHs) has been hailed as potential distance indicators for cosmology. The aim of this paper is to define tight criteria for their proper id
Externí odkaz:
http://arxiv.org/abs/2001.08765
Autor:
Martínez-Paredes, M., González-Martín, O., Esparza-Arredondo, D., Kim, M., Alonso-Herrero, A., Krongold, Y., Hoang, T., Almeida, C. Ramos, Aretxaga, I., Dultzin, D., Hodgson, J.
We measure the 10 and $18\mu$m silicate features in a sample of 67 local ($z<0.1$) type 1 active galactic nuclei (AGN) with available {\it Spitzer} spectra dominated by non-stellar processes. We find that the $10\mu$m silicate feature peaks at $10.3^
Externí odkaz:
http://arxiv.org/abs/2001.00844
Autor:
González-Martín, O., Masegosa, J., García-Bernete, I., Almeida, C. Ramos, Rodríguez-Espinosa, J. M., Márquez, I., Esparza-Arredondo, D., Osorio-Clavijo, N., Martínez-Paredes, M., Victoria-Ceballos, C., Pasetto, A., Dultzin, D.
This is the second in a series of papers devoted to explore a set of six dusty models of active galactic nuclei (AGN) with available spectral energy distributions (SEDs). These models are the smooth torus by Fritz et al. (2006), the clumpy torus by N
Externí odkaz:
http://arxiv.org/abs/1908.11389