Zobrazeno 1 - 10
of 690
pro vyhledávání: '"RESTREPO, J. A"'
Autor:
Melo, A., Motta, V., Mejía-Restrepo, J., Assef, R. J., Godoy, N., Mediavilla, E., Falco, E., Kochanek, C. S., Ávila-Vera, F., Jerez, R.
Publikováno v:
A&A 680, A51 (2023)
We estimate black hole masses (M$_{\rm BH}$) for 14 gravitationally lensed quasars using the Balmer lines along with estimates based on MgII and CIV emission lines for four and two of them, respectively. We compare with results obtained for other len
Externí odkaz:
http://arxiv.org/abs/2306.03472
Autor:
F., Ricci, E., Treister, E., Bauer F., E., Mejía-Restrepo J., M., Koss, S., den Brok, M., Baloković, R., Bär, P., Bessiere, T., Caglar, F., Harrison, K., Ichikawa, D., Kakkad, I., Lamperti, R., Mushotzky, K., Oh, C., Powell M., C., Privon G., C., Ricci, R., Riffel, F., Rojas A., E., Sani, L., Smith K., D., Stern, B., Trakhtenbrot, M., Urry C., S., Veilleux
Virial black hole mass ($M_{BH}$) determination directly involves knowing the broad line region (BLR) clouds velocity distribution, their distance from the central supermassive black hole ($R_{BLR}$) and the virial factor ($f$). Understanding whether
Externí odkaz:
http://arxiv.org/abs/2111.13720
Autor:
Melo, A., Motta, V., Godoy, N., Mejia-Restrepo, J., Assef, Roberto J., Mediavilla, E., Falco, E., Ávila-Vera, F., Jerez, R.
Publikováno v:
A&A 656, A108 (2021)
The quadruple lensed system WGD2038-4008 was recently discovered with the help of new techniques and observations. Even though black hole mass has been estimated for lensed quasars, it has been calculated mostly for one broad emission line of one ima
Externí odkaz:
http://arxiv.org/abs/2110.01575
Autor:
Giraldo-Barreto, Julian, Restrepo, J.
In this research, the tax evasion percentage, as order parameter, of a system of individuals or agents inscribed in a $N = L \times L$ 2D square grid is computed. The influence of local environment over each agent is quantified both through competiti
Externí odkaz:
http://arxiv.org/abs/2102.11763
Autor:
Mediavilla, E., Jiménez-Vicente, J., A-Restrepo, J. Mejí, Motta, V., Falco, E., Muñoz, J. A., Fian, C., Guerras, E.
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:
http://arxiv.org/abs/2005.03901
Publikováno v:
In Solid State Communications 15 October 2023 372
Publikováno v:
Phys. Rev. A 102, 051701 (2020)
We study the generation of spin-squeezing in arrays of long-lived dipoles subject to collective emission, coherent drive, elastic interactions, and spontaneous emission. Counter-intuitively, it is found that the introduction of spontaneous emission l
Externí odkaz:
http://arxiv.org/abs/1911.09617
Autor:
Mediavilla, E., JimÉnez-Vicente, J., MejÍa-Restrepo, J., Motta, V., Falco, E., MuÑoz, J. A., Fian, C., Guerras, E.
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$2039-2113 line blend. To this end, we fit this feature in the spe
Externí odkaz:
http://arxiv.org/abs/1907.04026
Autor:
Paliya, Vaidehi S., Koss, M., Trakhtenbrot, B., Ricci, C., Oh, K., Ajello, M., Stern, D., Powell, M. C., Urry, C. M., Harrison, F., Lamperti, I., Mushotzky, R., Marcotulli, L., Mejía-Restrepo, J., Hartmann, D.
Publikováno v:
2019ApJ...881..154P
The recently released 105-month {\it Swift}-Burst Alert Telescope (BAT) all-sky hard X-ray survey catalog presents an opportunity to study astrophysical objects detected in the deepest look at the entire hard X-ray (14$-$195 keV) sky. Here we report
Externí odkaz:
http://arxiv.org/abs/1907.01082
Publikováno v:
Phys. Rev. B 101, 054419 (2020)
We investigate the effects of the competition between exchange ($J$) and dipolar ($D$) interactions on the magnetization reversal mechanisms of ferromagnetic nanotubes. Using first atomistic Monte Carlo (MC) simulations for a model with Heisenberg sp
Externí odkaz:
http://arxiv.org/abs/1904.05116