Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Shields, J. C."'
Autor:
Molina, M., Eracleous, M., Barth, A. J., Maoz, D., Runnoe, J. C., Ho, L. C., Shields, J. C., Walsh, J. L.
The majority of low-ionization nuclear emission-line regions (LINERs) harbor supermassive black holes with very low accretion rates. However, the accretion flows do not produce enough ionizing photons to power the emission lines emitted on scales of
Externí odkaz:
http://arxiv.org/abs/1804.06888
Quasar outflows have long been recognized as potential contributors to the co-evolution between supermassive black holes (SMBHs) and their host galaxies. The role of outflows in AGN feedback processes can be better understood by placing observational
Externí odkaz:
http://arxiv.org/abs/1712.04715
Autor:
Moravec, E. A., Hamann, F., Capellupo, D. M., McGraw, S. M., Shields, J. C., Hidalgo, P. Rodríguez
Publikováno v:
2017MNRAS.468.4539M
Quasar outflows have been posited as a mechanism to couple super-massive black holes to evolution in their host galaxies. We use multi-epoch spectra from the Hubble Space Telescope and ground-based observatories to study the outflows in seven quasars
Externí odkaz:
http://arxiv.org/abs/1703.10691
Autor:
McGraw, S. M., Shields, J. C., Hamann, F. W., Capellupo, D. M., Gallagher, S. C., Brandt, W. N.
FeLoBALs are a rare class of quasar outflows with low-ionization broad absorption lines (BALs), large column densities, and potentially large kinetic energies that might be important for `feedback' to galaxy evolution. In order to probe the physical
Externí odkaz:
http://arxiv.org/abs/1507.07247
Autor:
Peterson, B. M., Grier, C. J., Horne, Keith, Pogge, R. W., Bentz, M. C., De Rosa, G., Denney, K. D., Martini, Paul, Sergeev, S. G., Kaspi, S., Minezaki, T., Zu, Y., Kochanek, C. S., Siverd, R. J., Shappee, B., Salvo, C. Araya, Beatty, T. G., Bird, J. C., Bord, D. J., Borman, G. A., Che, X., Chen, C. T., Cohen, S. A., Dietrich, M., Doroshenko, V. T., Drake, T., Efimov, Yu. S., Free, N., Ginsburg, I., Henderson, C. B., King, A. L., Koshida, S, Mogren, K., Molina, M., Mosquera, A. M., Motohara, K., Nazarov, S. V., Okhmat, D. N., Pejcha, O., Rafter, S., Shields, J. C., Skowron, D. M., Skowron, J., Valluri, M., van Saders, J. L., Yoshii, Y.
A large reverberation mapping study of the Seyfert 1 galaxy NGC 7469 has yielded emission-line lags for Hbeta 4861 and He II 4686 and a central black hole mass measurement of about 10 million solar masses, consistent with previous measurements. A ver
Externí odkaz:
http://arxiv.org/abs/1409.4448
Autor:
Grier, C. J., Peterson, B. M., Horne, Keith, Bentz, M. C., Pogge, R. W., Denney, K. D., De Rosa, G., Martini, Paul, Kochanek, C. S., Zu, Y., Shappee, B., Siverd, R., Beatty, T. G., Sergeev, S. G., Kaspi, S., Salvo, C. Araya, Bird, J. C., Bord, D. J., Borman, G. A., Che, X., Chen, C., Cohen, S. A., Dietrich, M., Doroshenko, V. T., Efimov, Yu. S., Free, N., Ginsburg, I., Henderson, C. B., King, A. L., Mogren, K., Molina, M., Mosquera, A. M., Nazarov, S. V., Okhmat, D. N., Pejcha, O., Rafter, S., Shields, J. C., Skowron, J., Szczygiel, D. M., Valluri, M., van Saders, J. L.
We present velocity-resolved reverberation results for five active galactic nuclei. We recovered velocity-delay maps using the maximum-entropy method for four objects: Mrk 335, Mrk 1501, 3C120, and PG2130+099. For the fifth, Mrk 6, we were only able
Externí odkaz:
http://arxiv.org/abs/1210.2397
Autor:
Grier, C. J., Peterson, B. M., Pogge, R. W., Denney, K. D., Bentz, M. C., Martini, Paul, Sergeev, S. G., Kaspi, S., Minezaki, T., Zu, Y., Kochanek, C. S., Siverd, R., Shappee, B., Stanek, K. Z., Salvo, C. Araya, Beatty, T. G., Bird, J. C., Bord, D. J., Borman, G. A., Che, X., Chen, C., Cohen, S. A., Dietrich, M., Doroshenko, V. T., Drake, T., Efimov, Yu. S., Free, N., Ginsburg, I., Henderson, C. B., King, A. L., Koshida, S., Mogren, K., Molina, M., Mosquera, A. M., Nazarov, S. V., Okhmat, D. N., Pejcha, O., Rafter, S., Shields, J. C., Skowron, J., Szczygiel, D. M., Valluri, M., van Saders, J. L.
We present the results from a detailed analysis of photometric and spectrophotometric data on five Seyfert 1 galaxies observed as a part of a recent reverberation mapping program. The data were collected at several observatories over a 140-day span b
Externí odkaz:
http://arxiv.org/abs/1206.6523
Autor:
Grier, C. J., Peterson, B. M., Pogge, R. W., Denney, K. D., Bentz, M. C., Martini, Paul, Sergeev, S. G., Kaspi, S., Zu, Y., Kochanek, C. S., Shappee, B. J., Stanek, K. Z., Salvo, C. Araya, Beatty, T. G., Bird, J. C., Bord, D. J., Borman, G. A., Che, X., Chen, C., Cohen, S. A., Dietrich, M., Doroshenko, V. T., Efimov, Yu. S., Free, N., Ginsburg, I., Henderson, C. B., Horne, Keith, King, A. L., Mogren, K., Molina, M., Mosquera, A. M., Nazarov, S. V., Okhmat, D. N., Pejcha, O., Rafter, S., Shields, J. C., Skowron, J., Szczygiel, D. M., Valluri, M., van Saders, J. L.
We present the first results from a detailed analysis of photometric and spectrophotometric data on the narrow-line Seyfert 1 galaxy Mrk 335, collected over a 120-day span in the fall of 2010. From these data we measure the lag in the He II 4686 broa
Externí odkaz:
http://arxiv.org/abs/1110.6179
Autor:
Gorjian, V., Brodwin, M., Kochanek, C. S., Murray, S., Stern, D., Brand, K., Eisenhardt, P. R., Ashby, M. L. N., Barmby, P., Brown, M. J. I., Dey, A., Forman, W., Jannuzi, B. T., Jones, C., Kenter, A. T., Pahre, M. A., Shields, J. C., Werner, M. W., Willner, S. P.
We combine the results of the Spitzer IRAC Shallow Survey and the Chandra XBootes Survey of the 8.5 square degrees Bootes field of the NOAO Deep Wide- Field Survey to produce the largest comparison of mid-IR and X-ray sources to date. The comparison
Externí odkaz:
http://arxiv.org/abs/0803.0357
Context: BL Lacertae objects have been the targets for numerous recent multiwavelength campaigns, continuum spectral variability studies, and theoretical spectral and variability modeling. A meaningful interpretation of the results of such studies re
Externí odkaz:
http://arxiv.org/abs/0711.2089