Zobrazeno 1 - 10
of 5 243
pro vyhledávání: '"POWELL, M."'
Autor:
Bierschenk, M., Ricci, C., Temple, M. J., Satyapal, S., Cann, J., Xie, Y., Diaz, Y., Ichikawa, K., Koss, M. J., Bauer, F. E., Rojas, A., Kakkad, D., Tortosa, A., Ricci, F., Mushotzky, R., Kawamuro, T., Gupta, K. K., Trakhtenbrot, B., Chang, C. S., Riffel, R., Oh, K., Harrison, F., Powell, M., Stern, D., Urry, C. M.
We analyze the Spitzer spectra of 140 active galactic nuclei (AGN) detected in the hard X-rays (14-195 keV) by the Burst Alert Telescope (BAT) on board Swift. This sample allows us to probe several orders of magnitude in black hole masses ($10^6-10^9
Externí odkaz:
http://arxiv.org/abs/2409.17334
Publikováno v:
A&A 686, A57 (2024)
The connection between active galactic nuclei (AGN) and their host dark matter halos provides powerful insights into how supermassive black holes (SMBHs) grow and coevolve with their host galaxies. Here we investigate the impact of observational AGN
Externí odkaz:
http://arxiv.org/abs/2403.03978
Autor:
Ricci, C., Ichikawa, K., Stalevski, M., Kawamuro, T., Yamada, S., Ueda, Y., Mushotzky, R., Privon, G. C., Koss, M. J., Trakhtenbrot, B., Fabian, A. C., Ho, L. C., Asmus, D., Bauer, F. E., Chang, C. S., Gupta, K. K., Oh, K., Powell, M., Pfeifle, R. W., Rojas, A., Ricci, F., Temple, M. J., Toba, Y., Tortosa, A., Treister, E., Harrison, F., Stern, D., Urry, C. M.
Accreting supermassive black holes (SMBHs) located at the center of galaxies are typically surrounded by large quantities of gas and dust. The structure and evolution of this circumnuclear material can be studied at different wavelengths, from the su
Externí odkaz:
http://arxiv.org/abs/2311.01494
Autor:
Yahne, D. R., Placke, B., Schäfer, R., Benton, O., Moessner, R., Powell, M., Kolis, J. W., Pasco, C. M., May, A. F., Frontzek, M. D., Smith, E. M., Gaulin, B. D., Calder, S., Ross, K. A.
Publikováno v:
D. R. Yahne et al., Phys. Rev. X 14, 011005 (2024)
The dipolar-octupolar (DO) pyrochlores, R$_2$M$_2$O$_7$ (R = Ce, Sm, Nd), are key players in the search for realizable novel quantum spin liquid (QSL) states as a large parameter space within the DO pyrochlore phase diagram is theorized to host QSL s
Externí odkaz:
http://arxiv.org/abs/2211.15140
Autor:
Marcotulli, L., Ajello, M., Urry, C. M., Paliya, V. S., Koss, M., Oh, K., Madejski, G., Ueda, Y., Baloković, M., Trakhtenbrot, B., Ricci, F., Ricci, C., Stern, D., Harrison, F., Powell, M. C., Collaboration, BASS
We derive the most up-to-date Swift-Burst Alert Telescope (BAT) blazar luminosity function in the 14-195 keV range, making use of a clean sample of 118 blazars detected in the BAT 105-month survey catalog, with newly obtained redshifts from the BAT A
Externí odkaz:
http://arxiv.org/abs/2209.09929
Autor:
Powell, M. C., Allen, S. W., Caglar, T., Cappelluti, N., Harrison, F., Irving, B. E., Koss, M. J., Mantz, A. B., Oh, K., Ricci, C., Shaper, R. J., Stern, D., Trakhtenbrot, B., Urry, C. M., Wong, J.
Publikováno v:
ApJ 938, 77 (2022)
We investigate the connection between supermassive black holes (SMBHs) and their host dark matter halos in the local universe using the clustering statistics and luminosity function of AGN from the Swift/BAT AGN Spectroscopic survey (BASS DR2). By fo
Externí odkaz:
http://arxiv.org/abs/2209.02728
Autor:
Ricci, C., Ananna, T. T., Temple, M. J., Urry, C. M., Koss, M. J., Trakhtenbrot, B., Ueda, Y., Stern, D., Bauer, F. E., Treister, E., Privon, G. C., Oh, K., Paltani, S., Stalevski, M., Ho, L. C., Fabian, A. C., Mushotzky, R., Chang, C. S., Ricci, F., Kakkad, D., Sartori, L., Baer, R., Caglar, T., Powell, M., Harrison, F.
We study the relation between obscuration and supermassive black hole (SMBH) growth using a large sample of hard X-ray selected Active Galactic Nuclei (AGN). We find a strong decrease in the fraction of obscured sources above the Eddington limit for
Externí odkaz:
http://arxiv.org/abs/2209.00014
Autor:
Kakkad, D., Sani, E., Rojas, A. F., Mallmann, Nicolas D., Veilleux, S., Bauer, Franz E., Ricci, F., Mushotsky, R., Koss, M., Ricci, C., Treister, E., Privon, George C., Nguyen, N., Bär, R., Harrison, F., Oh, K., Powell, M., Riffel, R., Stern, D., Trakhtenbrot, B., Urry, C. M.
Ionised gas kinematics provide crucial evidence of the impact that active galactic nuclei (AGN) have in regulating star formation in their host galaxies. Although the presence of outflows in AGN host galaxies has been firmly established, the calculat
Externí odkaz:
http://arxiv.org/abs/2201.04149
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