Zobrazeno 1 - 10
of 29
pro vyhledávání: '"J. Mejia-Restrepo"'
Autor:
Roberto J. Assef, E. E. Falco, J. Mejia-Restrepo, Evencio Mediavilla, Veronica Motta, R. Jerez, A. Melo, N. Godoy, F. Ávila-Vera
Context. The quadruple lensed system WGD2038-4008 (zs = 0.777 ± 0.001) has recently been discovered with the help of new techniques and observations. Black hole masses have been estimated for lensed quasars, but they have mostly been calculated for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1710f220b5d40d6e6ecaa11d15b5e02
http://arxiv.org/abs/2110.01575
http://arxiv.org/abs/2110.01575
Autor:
J. Mejia-Restrepo, E. Mediavilla, Veronica Motta, J. A. Muñoz, C. Fian, Eduardo Guerras, J. Jiménez-Vicente, E. E. Falco
Assuming a gravitational origin for the Fe III$\lambda\lambda$2039-2113 redshift and using microlensing based estimates of the size of the region emitting this feature, we obtain individual measurements of the virial factor, $f$, in 10 quasars. The a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a88953c3dc13e308e070a336b7f7b854
http://arxiv.org/abs/2005.03901
http://arxiv.org/abs/2005.03901
Autor:
Benny Trakhtenbrot, Fiona A. Harrison, O. Ivy Wong, J. Mejia-Restrepo, Franz E. Bauer, Junhyun Baek, Krista Lynne Smith, Claudio Ricci, C. Meg Urry, Richard F. Mushotzky, Stuart N. Vogel, Meredith Powell, Federica Ricci, Kyuseok Oh, Aeree Chung, Daniel Stern, Michael Koss
We have conducted 22 GHz radio imaging at 1" resolution of 100 low-redshift AGN selected at 14-195 keV by the Swift-BAT. We find a radio core detection fraction of 96%, much higher than lower-frequency radio surveys. Of the 96 radio-detected AGN, 55
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90f93df6ae3760ce6b3c45f822607aff
Akademický článek
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Autor:
E. E. Falco, Evencio Mediavilla, J. Mejia-Restrepo, J. A. Muñoz, Veronica Motta, C. Fian, E. Guerras, J. Jiménez-Vicente
We test the recently proposed (Mediavilla et al. 2018) black hole mass scaling relationship based on the redshift {with respect to the quasar's rest frame} of the Fe III$\lambda\lambda$2039-2113 line blend. To this end, we fit this feature in the spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::264b7363b213df271e277510d3769bed
http://arxiv.org/abs/1907.04026
http://arxiv.org/abs/1907.04026
Autor:
Benny Trakhtenbrot, Mariusz Gromadzki, Iair Arcavi, Erin Kara, S. Bradley Cenko, Nikita Kamraj, A. Hamanowicz, David J. Sand, Mark M. Phillips, Hagai Netzer, Marianne Heida, Ron Remillard, Sandro Tacchella, D. Andrew Howell, Daniel Stern, J. Mejia-Restrepo, Łukasz Wyrzykowski, Curtis McCully, Griffin Hosseinzadeh, Valentina Hallefors, Claudio Ricci, Mislav Baloković, T. R. Diamond, Keith C. Gendreau, Peter G. Jonker, George B. Lansbury, Zaven Arzoumanian, Assaf Horesh, Eric Hsiao
Publikováno v:
Nature Astronomy, 3, pp. 242-250
Nature Astronomy, 3, 242-250
Nature Astronomy, 3, 242-250
Accreting supermassive black holes (SMBHs) can exhibit variable emission across the electromagnetic spectrum and over a broad range of timescales. The variability of active galactic nuclei (AGNs) in the ultraviolet and optical is usually at the few t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c589d4adc13b5e7229a9196b3e6f375f
https://resolver.caltech.edu/CaltechAUTHORS:20190614-111557235
https://resolver.caltech.edu/CaltechAUTHORS:20190614-111557235
Autor:
Benny Trakhtenbrot, Marco Ajello, J. Mejia-Restrepo, Fiona A. Harrison, L. Marcotulli, C. M. Urry, Dieter H. Hartmann, Daniel Stern, Michael Koss, Isabella Lamperti, Meredith Powell, Claudio Ricci, Kyuseok Oh, Vaidehi S. Paliya, Richard F. Mushotzky
Publikováno v:
The astrophysical journal / 1 881(2), 154-(2019). doi:10.3847/1538-4357/ab2f8b
The astrophysical journal / 1 881(2), 154 - (2019). doi:10.3847/1538-4357/ab2f8b
The recently released 105-month Swift-Burst Alert Telescope (BAT) all-sky hard X-ray survey catalog presents an opportunity to study astrophysical objects detected
The recently released 105-month Swift-Burst Alert Telescope (BAT) all-sky hard X-ray survey catalog presents an opportunity to study astrophysical objects detected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7088fe8a55403065fe13477b91c75c0
https://bib-pubdb1.desy.de/record/426014
https://bib-pubdb1.desy.de/record/426014
Autor:
Jorge Martínez-Palomera, Nidia Morrell, Paulina Lira, Shai Kaspi, P. Sanchez-Saez, Hagai Netzer, J. Mejia-Restrepo, P. Lopez, Ismael Botti
Publikováno v:
The Astrophysical Journal. 892:156
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76c95ebd1bdad933f3cf93556d19dc8e
https://doi.org/10.3847/1538-4357/ab6f68
https://doi.org/10.3847/1538-4357/ab6f68
Autor:
Paula Sanchez, P. Lopez, Jorge Martínez, Nidia Morrell, Ismael Botti, J. Mejia-Restrepo, Shai Kaspi, Paulina Lira, Hagai Netzer
We present Reverberation Mapping (RM) results for 17 high-redshift, high-luminosity quasars with good quality R-band and emission line light curves. We are able to measure statistically significant lags for Ly_alpha (11 objects), SiIV (5 objects), CI
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b97ad0fab9576c9be487c324c06866c2
http://arxiv.org/abs/1806.08358
http://arxiv.org/abs/1806.08358
In large optical survey at high redshifts ($z>2$), the CIV broad emission line is the most practical alternative to estimate the mass ($M_{\text{BH}}$) of active super-massive black holes (SMBHs). However, mass determinations obtained with this line
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6222d80ece6ee48853562d963792011