Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Koss, M. J."'
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:
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:
Ricci, C., Privon, G. C., Pfeifle, R. W., Armus, L., Iwasawa, K., Torres-Alba, N., Satyapal, S., Bauer, F. E., Treister, E., Ho, L. C., Aalto, S., Arevalo, P., Barcos-Munoz, L., Charmandaris, V., Diaz-Santos, T., Evans, A. S., Gao, T., Inami, H., Koss, M. J., Lansbury, G., Linden, S. T., Medling, A., Sanders, D. B., Song, Y., Stern, D., U, V., Ueda, Y., Yamada, S.
The merger of two or more galaxies can enhance the inflow of material from galactic scales into the close environments of Active Galactic Nuclei (AGN), obscuring and feeding the supermassive black hole (SMBH). Both recent simulations and observations
Externí odkaz:
http://arxiv.org/abs/2107.10864
Autor:
Miller, J. M., Zoghbi, Z., Reynolds, M. T., Raymond, J., Barret, D., Behar, E., Brandt, W. N., Brenneman, L., Draghis, P., Kammoun, E., Koss, M. J., Lohfink, A., Stern, D. K.
Accretion disks and coronae around massive black holes have been studied extensively, and they are known to be coupled. Over a period of 30 years, however, the X-ray (coronal) flux of Mrk 817 increased by a factor of 40 while its UV (disk) flux remai
Externí odkaz:
http://arxiv.org/abs/2103.09789
Autor:
Baloković, M., Harrison, F. A., Madejski, G., Comastri, A., Ricci, C., Annuar, A., Ballantyne, D. R., Boorman, P., Brandt, W. N., Brightman, M., Gandhi, P., Kamraj, N., Koss, M. J., Marchesi, S., Marinucci, A., Masini, A., Matt, G., Stern, D., Urry, C. M.
Broadband X-ray spectroscopy of the X-ray emission produced in the coronae of active galactic nuclei (AGN) can provide important insights into the physical conditions very close to their central supermassive black holes. The temperature of the Compto
Externí odkaz:
http://arxiv.org/abs/2011.06583