Zobrazeno 1 - 10
of 17 130
pro vyhledávání: '"Koss, M"'
Autor:
Jana, A., Ricci, C., Temple, M. J., Chang, H. -K., Shablovinskaya, E., Trakhtenbrot, B., Diaz, Y., Ilic, D., Nandi, P., Koss, M.
Changing-look active galactic nuclei (CLAGNs) show the appearance and disappearance of broad emission lines in their UV/optical spectra on timescales of months to decades. Here, we investigate how CL transitions depend on several AGN parameters such
Externí odkaz:
http://arxiv.org/abs/2411.08676
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
Autor:
Shablovinskaya, E., Ricci, C., Chang, C-S., Tortosa, A., del Palacio, S., Kawamuro, T., Aalto, S., Arzoumanian, Z., Balokovic, M., Bauer, F. E., Gendreau, K. C., Ho, L. C., Kakkad, D., Kara, E., Koss, M. J., Liu, T., Loewenstein, M., Mushotzky, R., Paltani, S., Privon, G. C., Smith, K., Tombesi, F., Trakhtenbrot, B.
Publikováno v:
A&A 690, A232 (2024)
The origin of a compact millimeter (mm, 100-250 GHz) emission in radio-quiet active galactic nuclei (RQ AGN) remains debated. Recent studies propose a connection with self-absorbed synchrotron emission from the accretion disk X-ray corona. We present
Externí odkaz:
http://arxiv.org/abs/2403.19524
Autor:
Tortosa, A., Ricci, C., Shablovinskaia, E., Tombesi, F., Kawamuro, T., Kara, E., Mantovani, G., Balokovic, M., Chang, C-S., Gendreau, K., Koss, M. J., Liu, T., Loewenstein, M., Paltani, S., Privon, G. C., Trakhtenbrot, B.
Publikováno v:
A&A 687, A51 (2024)
We present the results of a joint {\it XMM-Newton} and {\it NuSTAR} campaign on the active galactic nucleus (AGN) IC 4329A, consisting of 9 $\times$ 20 ks {\it XMM-Newton} observations, and 5 $\times$ 20 ks {\it NuSTAR} observations within nine days,
Externí odkaz:
http://arxiv.org/abs/2312.00783
Autor:
Russell, H. R., Lopez, L. A., Allen, S. W., Chartas, G., Choudhury, P. P., Dupke, R. A., Fabian, A. C., Flores, A. M., Garofali, K., Hodges-Kluck, E., Koss, M. J., Lanz, L., Lehmer, B. D., Li, J. -T., Maksym, W. P., Mantz, A. B., McDonald, M., Miller, E. D., Mushotzky, R. F., Qiu, Y., Reynolds, C. S., Tombesi, F., Tozzi, P., Trindade-Falcao, A., Walker, S. A., Wong, K. -W., Yukita, M., Zhang, C.
Stellar and black hole feedback heat and disperse surrounding cold gas clouds, launching gas flows off circumnuclear and galactic disks and producing a dynamic interstellar medium. On large scales bordering the cosmic web, feedback drives enriched ga
Externí odkaz:
http://arxiv.org/abs/2311.07661
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:
Díaz, Y., Hernández-García, L., Arévalo, P., López-Navas, E., Ricci, C., Koss, M., González-Martín, O., Baloković, M., Osorio-Clavijo, N., García, J., Malizia, A.
Publikováno v:
A&A 669, A114 (2023)
An interesting feature in active galactic nuclei (AGN) accreting at low rate is the weakness of the reflection features in their X-ray spectra, which can result from the gradual disappearance of the torus with decreasing accretion rates. It has been
Externí odkaz:
http://arxiv.org/abs/2210.15376
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