Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Ogrean, G. A."'
Autor:
Balestra, I., Mercurio, A., Sartoris, B., Girardi, M., Grillo, C., Nonino, M., Rosati, P., Biviano, A., Ettori, S., Forman, W., Jones, C., Koekemoer, A., Medezinski, E., Merten, J., Ogrean, G. A., Tozzi, P., Umetsu, K., Vanzella, E., Weeren, R. J. van, Zitrin, A., Annunziatella, M., Caminha, G. B., Broadhurst, T., Coe, D., Donahue, M., Fritz, A., Frye, B., Kelson, D., Lombardi, M., Maier, C., Meneghetti, M., Monna, A., Postman, M., Scodeggio, M., Seitz, S., Ziegler, B.
We present VIMOS-Very Large Telescope (VLT) spectroscopy of the Frontier Fields cluster MACS. J0416.1-2403 (z = 0.397). Taken as part of the CLASH-VLT survey, the large spectroscopic campaign provided more than 4000 reliable redshifts over similar to
Externí odkaz:
http://hdl.handle.net/10150/621406
http://arizona.openrepository.com/arizona/handle/10150/621406
http://arizona.openrepository.com/arizona/handle/10150/621406
Autor:
Bonafede, A., Cassano, R., Brüggen, M., Ogrean, G. A., Riseley, C. J., Cuciti, V., de Gasperin, F., Golovich, N., Kale, R., Venturi, T., van Weeren, R. J, Wik, D. R., Wittman, D.
Pairs of radio relics are believed to form during cluster mergers, and are best observed when the merger occurs in the plane of the sky. Mergers can also produce radio halos, through complex processes likely linked to turbulent re-acceleration of cos
Externí odkaz:
http://arxiv.org/abs/1706.04203
Autor:
van Weeren, R. J., Ogrean, G. A., Jones, C., Forman, W. R., Andrade-Santos, F., Pearce, Connor J. J., Bonafede, A., Brüggen, M., Bulbul, E., Clarke, T. E., Churazov, E., David, L., Dawson, W. A., Donahue, M., Goulding, A., Kraft, R. P., Mason, B., Merten, J., Mroczkowski, T., Nulsen, P. E. J., Rosati, P., Roediger, E., Randall, S. W., Sayers, J., Umetsu, K., Vikhlinin, A., Zitrin, A.
To investigate the relationship between thermal and non-thermal components in merger galaxy clusters, we present deep JVLA and Chandra observations of the HST Frontier Fields cluster MACS J0717.5+3745. The Chandra image shows a complex merger event,
Externí odkaz:
http://arxiv.org/abs/1701.04096
Autor:
Ogrean, G. A., van Weeren, R. J., Jones, C., Forman, W., Dawson, W. A., Golovich, N., Andrade-Santos, F., Murray, S. S., Nulsen, P., Roediger, E., Zitrin, A., Bulbul, E., Kraft, R., Goulding, A., Umetsu, K., Mroczkowski, T., Bonafede, A., Randall, S., Sayers, J., Churazov, E., David, L., Merten, J., Donahue, M., Mason, B., Rosati, P., Vikhlinin, A., Ebeling, H.
The HST Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal the most distant col
Externí odkaz:
http://arxiv.org/abs/1603.06010
Autor:
van Weeren, R. J., Williams, W. L., Hardcastle, M. J., Shimwell, T. W., Rafferty, D. A., Sabater, J., Heald, G., Sridhar, S. S., Dijkema, T. J., Brunetti, G., Brüggen, M., Andrade-Santos, F., Ogrean, G. A., Röttgering, H. J. A., Dawson, W. A., Forman, W. R., de Gasperin, F., Jones, C., Miley, G. K., Rudnick, L., Sarazin, C. L., Bonafede, A., Best, P. N., Bîrzan, L., Cassano, R., Chyży, K. T., Croston, J. H., Ensslin, T., Ferrari, C., Hoeft, M., Horellou, C., Jarvis, M. J., Kraft, R. P., Mevius, M., Intema, H. T., Murray, S. S., Orrú, E., Pizzo, R., Simionescu, A., Stroe, A., van der Tol, S., White, G. J.
LOFAR, the Low-Frequency Array, is a powerful new radio telescope operating between 10 and 240 MHz. LOFAR allows detailed sensitive high-resolution studies of the low-frequency radio sky. At the same time LOFAR also provides excellent short baseline
Externí odkaz:
http://arxiv.org/abs/1601.05422
Autor:
van Weeren, R. J., Brunetti, G., Brüggen, M., Andrade-Santos, F., Ogrean, G. A., Williams, W. L., Röttgering, H. J. A., Dawson, W. A., Forman, W. R., de Gasperin, F., Hardcastle, M. J., Jones, C., Miley, G. K., Rafferty, D. A., Rudnick, L., Sabater, J., Sarazin, C. L., Shimwell, T. W., Bonafede, A., Best, P. N., Bîrzan, L., Cassano, R., Chyży, K. T., Croston, J. H., Dijkema, T. J., Ensslin, T., Ferrari, C., Heald, G., Hoeft, M., Horellou, C., Jarvis, M. J., Kraft, R. P., Mevius, M., Intema, H. T., Murray, S. S., Orrú, E., Pizzo, R., Sridhar, S. S., Simionescu, A., Stroe, A., van der Tol, S., White, G. J.
We present deep LOFAR observations between 120-181 MHz of the "Toothbrush" (RX J0603.3+4214), a cluster that contains one of the brightest radio relic sources known. Our LOFAR observations exploit a new and novel calibration scheme to probe 10 times
Externí odkaz:
http://arxiv.org/abs/1601.06029
Autor:
van Weeren, R. J., Ogrean, G. A., Jones, C., Forman, W. R., Andrade-Santos, F., Bonafede, A., Brüggen, M., Bulbul, E., Clarke, T. E., Churazov, E., David, L., Dawson, W. A., Donahue, M., Goulding, A., Kraft, R. P., Mason, B., Merten, J., Mroczkowski, T., Murray, S. S., Nulsen, P. E. J., Rosati, P., Roediger, E., Randall, S. W., Sayers, J., Umetsu, K., Vikhlinin, A., Zitrin, A.
We report on high-resolution JVLA and Chandra observations of the HST Frontier Cluster MACS J0717.5+3745. MACS J0717.5+3745 offers the largest contiguous magnified area of any known cluster, making it a promising target to search for lensed radio and
Externí odkaz:
http://arxiv.org/abs/1512.04527
Autor:
Balestra, I., Mercurio, A., Sartoris, B., Girardi, M., Grillo, C., Nonino, M., Rosati, P., Biviano, A., Ettori, S., Forman, W., Jones, C., Koekemoer, A., Medezinski, E., Merten, J., Ogrean, G. A., Tozzi, P., Umetsu, K., Vanzella, E., van Weeren, R. J., Zitrin, A., Annunziatella, M., Caminha, G. B., Broadhurst, T., Coe, D., Donahue, M., Fritz, A., Frye, B., Kelson, D., Lombardi, M., Maier, C., Meneghetti, M., Monna, A., Postman, M., Scodeggio, M., Seitz, S., Ziegler, B.
We present VIMOS-VLT spectroscopy of the Frontier Fields cluster MACS~J0416.1-2403 (z=0.397). Taken as part of the CLASH-VLT survey, the large spectroscopic campaign provided more than 4000 reliable redshifts, including ~800 cluster member galaxies.
Externí odkaz:
http://arxiv.org/abs/1511.02522
Autor:
Akamatsu, H., van Weeren, R. J., Ogrean, G. A., Kawahara, H., Stroe, A., Sobral, D., Hoeft, M., Röttgering, H., Brüggen, M., Kaastra, J. S.
Publikováno v:
A&A 582, A87 (2015)
Content: We present the results from $Suzaku$ observations of the merging cluster of galaxies CIZA J2242.8+5301 at $z$=0.192. Aims. To study the physics of gas heating and particle acceleration in cluster mergers, we investigated the X-ray emission f
Externí odkaz:
http://arxiv.org/abs/1507.02285
Autor:
Ogrean, G., van Weeren, R., Jones, C., Clarke, T. E., Sayers, J., Mroczkowski, T., Nulsen, P. E. J., Forman, W., Murray, S. S., Pandey-Pommier, M., Randall, S., Churazov, E., Bonafede, A., Kraft, R., David, L., Andrade-Santos, F., Merten, J., Zitrin, A., Umetsu, K., Goulding, A., Roediger, E., Bagchi, J., Bulbul, E., Donahue, M., Ebeling, H., Johnston-Hollitt, M., Mason, B., Rosati, P., Vikhlinin, A.
Merging galaxy clusters leave long-lasting signatures on the baryonic and non-baryonic cluster constituents, including shock fronts, cold fronts, X-ray substructure, radio halos, and offsets between the dark matter and the gas components. Using obser
Externí odkaz:
http://arxiv.org/abs/1505.05560