Zobrazeno 1 - 10
of 443
pro vyhledávání: '"Voit, M."'
Autor:
Rose, Tom, Edge, A. C., Combes, F., Gaspari, M., Hamer, S., Nesvadba, N., Russell, H., Tremblay, G. R., Baum, S. A., O'Dea, C., Peck, A. B., Sarazin, C., Vantyghem, A., Bremer, M., Donahue, M., Fabian, A. C., Ferland, G., McNamara, B. R., Mittal, R., Oonk, J. B. R., Salomé, P., Swinbank, A. M., Voit, M.
Active galactic nuclei play a crucial role in the accretion and ejection of gas in galaxies. Although their outflows are well studied, finding direct evidence of accretion has proved very difficult and has so far been done for very few sources. A pro
Externí odkaz:
http://arxiv.org/abs/1902.01863
Autor:
Sparks, W. B., Pringle, J. E., Carswell, R. F., Donahue, M., Martin, R., Voit, M., Cracraft, M., Manset, N., Hough, J. H.
The physical relationship between low-excitation gas filaments at ~10^4 K, seen in optical line emission, and diffuse X-ray emitting coronal gas at ~10^7 K in the centers of many galaxy clusters is not understood. It is unclear whether the ~10^4 K fi
Externí odkaz:
http://arxiv.org/abs/1203.5097
Autor:
Sparks, W. B., Pringle, J. E., Donahue, M., Carswell, R., Voit, M., Cracraft, M., Martin, R. G.
Publikováno v:
Astrophys.J.704:L20-L24,2009
Gas at intermediate temperature between the hot X-ray emitting coronal gas in galaxies at the centers of galaxy clusters, and the much cooler optical line emitting filaments, yields information on transport processes and plausible scenarios for the r
Externí odkaz:
http://arxiv.org/abs/0909.2063
Autor:
Myers, S. T., Pfrommer, C., Aguirre, J., Bond, J. R., Burns, J. O., Clarke, T., Devlin, M., Evrard, A., Golwala, S., Habib, S., Heitmann, K., Holzapfel, W. L., Kassim, N. E., Kravtsov, A., Lee, A. T., Markevich, M., Marrone, D., Nagai, D., Page, L., Pierpaoli, E., Rudnick, L., Sievers, J., Taylor, G., Voit, M.
We are learning much about how structure forms, in particular how clusters as nodes in the cosmic web evolve and accrete matter, and about the physical processes within these objects. In the next decade, the study of clusters will enable us to tackle
Externí odkaz:
http://arxiv.org/abs/0903.0401
Autor:
Sharon, Keren, Gal-Yam, A., Maoz, D., Donahue, M., Ebeling, H., Ellis, R., Filippenko, A., Foley, R., Freedman, W., Kirshner, R., Kneib, J. -P., Matheson, T., Mulchaey, J., Sarajedini, V., Voit, M.
Publikováno v:
AIPConf.Proc.924:460-463,2007
We describe our ongoing program designed to measure the SN-Ia rate in a sample of massive z=0.5-0.9 galaxy clusters. The SN-Ia rate is a poorly known observable, especially at high z, and in cluster environments. The SN rate and its redshift dependen
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611920
Publikováno v:
Astrophys.J.657:197-231,2007
We present a systematic investigation of X-ray thermal coronae in 157 early-type galaxies and 22 late-type galaxies from a survey of 25 hot (kT>3 keV), nearby (z<0.05) clusters, based on CHANDRA archival data. Cool galactic coronae (kT=0.5-1.1 keV ge
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606184
We present the discovery of a 70 kpc X-ray tail behind the small late-type galaxy ESO137-001 in the nearby, hot (T=6.5 keV) merging cluster A3627, from both Chandra and XMM observations. The tail has a length-to-width ratio of ~ 10. It is luminous (L
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511516
Autor:
Haiman, Z., Allen, S., Bahcall, N., Bautz, M., Boehringer, H., Borgani, S., Bryan, G., Cabrera, B., Canizares, C., Citterio, O., Evrard, A., Finoguenov, A., Griffiths, R., Hasinger, G., Henry, P., Jahoda, K., Jernigan, G., Kahn, S., Lamb, D., Majumdar, S., Mohr, J., Molendi, S., Mushotzky, R., Pareschi, G., Peterson, J., Petre, R., Predehl, P., Rasmussen, A., Ricker, G., Ricker, P., Rosati, P., Sanderson, A., Stanford, A., Voit, M., Wang, S., White, N., White, S.
The amount and nature of dark energy (DE) can be tightly constrained by measuring the spatial correlation features and evolution of a sample of ~ 100,000 galaxy clusters over the redshift range 0
Externí odkaz:
http://arxiv.org/abs/astro-ph/0507013
Autor:
McNamara, B. R., Wise, M. W., Nulsen, P. E. J., David, L. P., Carilli, C. L., Sarazin, C. L., O'Dea, C. P., Houck, J., Donahue, M., Baum, S., Voit, M., O'Connell, R. W., Koekemoer, A.
Publikováno v:
Astrophys.J. 562 (2001) L149
A Chandra image of the central 100 kpc of the Abell 2597 cluster of galaxies shows bright, irregular, X-ray emission within the central dominant cluster galaxy (CDG), and two low surface brightness cavities located 30 kpc from the CDG's nucleus. Unli
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110554
Autor:
Mathur, S., Green, P. J., Arav, N., Brotherton, M., Crenshaw, M., deKool, M., Elvis, M., Goodrich, R. W., Hamann, F., Hines, D. C., Kashyap, V., Korista, K., Peterson, B. M., Shields, J., Shlosman, I., van Breugel, W., Voit, M.
We present a deep ASCA observation of a Broad Absorption Line Quasar (BALQSO) PG0946+301. The source was clearly detected in one of the gas imaging spectrometers, but not in any other detector. If BALQSOs have intrinsic X-ray spectra similar to norma
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002054