Zobrazeno 1 - 10
of 833
pro vyhledávání: '"Perlman, E."'
It is well-known that active galactic nuclei (AGN) are accompanied by winds and outflows, some of which may reach weakly relativistic speeds of about $10$ percent the speed of light. Yet, in spite of their ubiquity, the impact of AGN outflows in modu
Externí odkaz:
http://arxiv.org/abs/2203.00929
Autor:
Peirson, A. L., Liodakis, I., Readhead, A. C. S., Lister, M. L., Perlman, E. S., Aller, M. F., Blandford, R. D., Grainge, K. J. B., Green, D. A., Gurwell, M. A., Hodges, M. W., Hovatta, T., Kiehlmann, S., Lähteenmäki, A., Max-Moerbeck, W., Mcaloone, T., O'Neill, S., Pavlidou, V., Pearson, T. J., Ravi, V., Reeves, R. A., Scott, P. F., Taylor, G. B., Titterington, D. J., Tornikoski, M., Vedantham, H. K., Wilkinson, P. N., Williams, D. T., Zensus, J. A.
Symmetric Achromatic Variability (SAV) is a rare form of radio variability in blazars that has been attributed to gravitational millilensing by a ~$10^2 - 10^5$ $M_\odot$ mass condensate. Four SAVs have been identified between 1980 and 2020 in the lo
Externí odkaz:
http://arxiv.org/abs/2201.01110
Autor:
Readhead, A. C. S., Ravi, V., Liodakis, I., Lister, M. L., Singh, V., Aller, M. F., Blandford, R. D., Browne, I. W. A., Gorjian, V., Grainge, K. J. B., Gurwell, M. A., Hodges, M. W., Hovatta, T., Kiehlmann, S., Lähteenmäki, A., McAloone, T., Max-Moerbeck, W., Pavlidou, V., Pearson, T. J., Peirson, A. L., Perlman, E. S., Reeves, R. A., Soifer, B. T., Taylor, G. B., Tornikoski, M., Vedantham, H. K., Werner, M., Wilkinson, P. N., Zensus, J. A.
PKS 1413+135 is one of the most peculiar blazars known. Its strange properties led to the hypothesis almost four decades ago that it is gravitationally lensed by a mass concentration associated with an intervening galaxy. It exhibits symmetric achrom
Externí odkaz:
http://arxiv.org/abs/2012.04045
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 498, Issue 3, November 2020
Tidal Disruption Events (TDEs) are characterized by the emission of a short burst of high-energy radiation. We analyze the cumulative impact of TDEs on galactic habitability using the Milky Way as a proxy. We show that X-rays and extreme ultraviolet
Externí odkaz:
http://arxiv.org/abs/2008.09988
Autor:
Lopez-Rodriguez, E., Alonso-Herrero, A., Diaz-Santos, T., Gonzalez-Martin, O., Ichikawa, K., Levenson, N. A., Martinez-Paredes, M., Nikutta, R., Packham, C., Perlman, E., Almeida, C. Ramos, Rodriguez-Espinosa, J. M., Telesco, C. M.
We combine new (NGC 1275, NGC 4151, and NGC 5506) and previously published (Cygnus A, Mrk 231, and NGC 1068) sub-arcsecond resolution mid-infrared (MIR; 8-13 $\mu$m) imaging- and spectro-polarimetric observations of six Seyfert galaxies using CanariC
Externí odkaz:
http://arxiv.org/abs/1805.01899
Autor:
Marshall, H. L., Gelbord, J. M., Worrall, D. M., Birkinshaw, M., Schwartz, D. A., Jauncey, D. L., Griffiths, G., Murphy, D. W., Lovell, J. E. J., Perlman, E. S., Godfrey, L.
We present Chandra X-ray imaging of a flux-limited sample of flat spectrum radio-emitting quasars with jet-like structure. X-rays are detected from 59% of 56 jets. No counterjets were detected. The core spectra are fitted by power law spectra with ph
Externí odkaz:
http://arxiv.org/abs/1802.04714
Autor:
Chiaberge, M., Ely, J. C., Meyer, E. T., Georganopoulos, M., Marinucci, A., Bianchi, S., Tremblay, G. R., Hilbert, B., Kotyla, J. P., Capetti, A., Baum, S. A., Macchetto, F. D., Miley, G., O'Dea, C. P., Perlman, E. S., Sparks, W. B., Norman, C.
Context. Radio-loud AGNs with powerful relativistic jets are thought to be associated with rapidly spinning black holes (BHs). BH spin-up may result from a number of processes, including accretion of matter onto the BH itself, and catastrophic events
Externí odkaz:
http://arxiv.org/abs/1611.05501
Autor:
Rodriguez-Ardila, A., Mason, R. E., Martins, L., Almeida, C. Ramos, Riffel, R. A., Riffel, R., Lira, P., Martin, O. Gonzalez, Dametto, N. Z., Flohic, H., Ho, L. C., Ruschel-Dutra, D., Thanjavur, K., Colina, L., McDermid, R. M., Perlman, E., Winge, C.
We present Gemini/GNIRS spectroscopy of the Seyfert 2 galaxy NGC 4388, with simultaneous coverage from 0.85 - 2.5 $\mu$m. Several spatially-extended emission lines are detected for the first time, both in the obscured and unobscured portion of the op
Externí odkaz:
http://arxiv.org/abs/1610.03925
Autor:
Lopez-Rodriguez, E., Packham, C., Jones, T. J., Siebenmorgen, R., Roche, P. F., Levenson, N. A., Alonso-Herrero, A., Perlman, E., Ichikawa, K., Almeida, C. Ramos, Gonzalez-Martin, O., Nikutta, R., Martinez-Paredes, M., Shenoy, D., Gordon, M. S., Telesco, C. M.
We present high-angular (0.17$-$0.35 arcsec) resolution imaging polarimetric observations of Mrk 231 in the 3.1 $\mu$m filter using MMT-Pol on the 6.5-m MMT, and in the 8.7 $\mu$m, 10.3 $\mu$m, and 11.6 $\mu$m filters using CanariCam on the 10.4-m Gr
Externí odkaz:
http://arxiv.org/abs/1609.09012
Autor:
García-Bernete, I., Almeida, C. Ramos, Acosta-Pulido, J. A., Alonso-Herrero, A., González-Martín, O., Hernán-Caballero, A., Pereira-Santaella, M., Levenson, N. A., Packham, C., Perlman, E. S., Ichikawa, K., Esquej, P., Díaz-Santos, T.
We present subarcsecond resolution mid-infrared (MIR) images obtained with 8-10 m-class ground-based telescopes of a complete volume-limited (DL<40 Mpc) sample of 24 Seyfert galaxies selected from the Swift/BAT nine month catalog. We use those MIR im
Externí odkaz:
http://arxiv.org/abs/1608.06513