Zobrazeno 1 - 10
of 432
pro vyhledávání: '"Macchetto, F."'
Autor:
Morishita, T., Chiaberge, M., Hilbert, B., Lambrides, E., Blecha, L., Baum, S., Bianchi, S., Capetti, A., Castignani, G., Macchetto, F. D., Miley, G. K., O'Dea, C. P., Norman, C. A.
3C186, a radio-loud quasar at $z=1.0685$, was previously reported to have both velocity and spatial offsets from its host galaxy, and has been considered as a promising candidate for a gravitational wave recoiling black hole triggered by a black hole
Externí odkaz:
http://arxiv.org/abs/2204.12499
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:
Hilbert, Bryan, Chiaberge, Marco, Kotyla, JohnPaul, Tremblay, Grant R., Stanghellini, Carlo, Sparks, William B., Baum, Stefi A., Capetti, Alessandro, Macchetto, F. Duccio, Miley, George K., O'Dea, Christopher P., Perlman, Eric S., Quillen, Alice C.
We present new rest frame UV and visible observations of 22 high-redshift (1 < z < 2.5) 3C radio galaxies and QSOs obtained with the Hubble Space Telescope's (HST) Wide Field Camera 3 (WFC3) instrument. Using a custom data reduction strategy in order
Externí odkaz:
http://arxiv.org/abs/1605.03196
Autor:
Kotyla, John Paul, Chiaberge, Marco, Baum, Stefi A., Capetti, Alessandro, Hilbert, Bryan, Macchetto, F. Duccio, Miley, George K., O'Dea, Christopher P., Perlman, Eric S., Sparks, William B., Tremblay, Grant. R.
We study the cluster environment for a sample of 21 radio loud AGN from the 3CR catalog at z>1, 12 radio galaxies and 9 quasars with HST images in the optical and IR. We use two different approaches to determine cluster candidates. We identify the ea
Externí odkaz:
http://arxiv.org/abs/1605.03161
Autor:
Massaro, F., Tremblay, G. R., Harris, D. E., Kharb, P., Axon, D., Balmaverde, B., Baum, S. A., Capetti, A., Chiaberge, M., Gilli, R., Giovannini, G., Grandi, P., Macchetto, F. D., O'Dea, C. P., Risaliti, G., Sparks, W., Torresi, E.
We report on the second round of Chandra observations of the 3C snapshot survey developed to observe the complete sample of 3C radio sources with z<0.3 for 8 ksec each. In the first paper, we illustrated the basic data reduction and analysis procedur
Externí odkaz:
http://arxiv.org/abs/1210.6027
Autor:
Balmaverde, B., Capetti, A., Grandi, P., Torresi, E., Chiaberge, M., Zaurin, J. Rodriguez, Tremblay, G. R., Axon, D. J., Baum, S. A., Giovannini, G., Kharb, P., Macchetto, F. D., Dea, C. P. O, Sparks, W.
We analyze Chandra observations of diffuse soft X-ray emission associated with a complete sample of 3CR radio galaxies at z < 0.3. In this paper we focus on the properties of the spectroscopic sub-classes of high excitation galaxies (HEGs) and broad
Externí odkaz:
http://arxiv.org/abs/1208.6515
Autor:
Capetti, Alessandro, Buttiglione, Sara, Axon, David J., Robinson, Andrew, Celotti, Annalisa, Baldi, Ranieri D., Chiaberge, Marco, Macchetto, F. Duccio, Sparks, William B.
From an optical spectroscopic survey of 3CR radio galaxies with z<0.3, we discovered a new spectroscopic class of powerful radio-loud AGN. The defining characteristics of these galaxies are that compared with radio galaxies of similar radio luminosit
Externí odkaz:
http://arxiv.org/abs/1101.1787
The 1.6 micron near infrared nuclei of 3C radio galaxies: Jets, thermal emission or scattered light?
Autor:
Baldi, R. D., Chiaberge, M., Capetti, A., Sparks, W., Macchetto, F. D., O'Dea, C. P., Axon, D. J., Baum, S. A., Quillen, A. C.
Using HST NICMOS 2 observations we have measured 1.6-micron near infrared nuclear luminosities of 100 3CR radio galaxies with z<0.3, by modeling and subtracting the extended emission from the host galaxy. We performed a multi-wavelength statistical a
Externí odkaz:
http://arxiv.org/abs/1010.5277
Autor:
Buttiglione, Sara, Capetti, Alessandro, Celotti, Annalisa, Axon, David J., Chiaberge, Marco, Macchetto, F. Duccio, Sparks, William B.
We present optical nuclear spectra for nine 3CR radio sources obtained with the Telescopio Nazionale Galileo, that complete our spectroscopic observations of the sample up to redshifts $<$ 0.3. We measure emission line luminosities and ratios, and de
Externí odkaz:
http://arxiv.org/abs/1010.1650
Autor:
Massaro, F., Harris, D. E., Tremblay, G., Axon, D., Baum, S., Capetti, A., Chiaberge, M., Gilli, R., Giovannini, G., Grandi, P., Macchetto, F. D., O'Dea, C., Risaliti, G., Sparks, W.
We report on our Chandra Cycle 9 program to observe half of the 60 (unobserved by Chandra) 3C radio sources at z<0.3 for 8 ksec each. Here we give the basic data: the X-ray intensity of the nuclei and any features associated with radio structures suc
Externí odkaz:
http://arxiv.org/abs/1003.2438