Zobrazeno 1 - 10
of 1 096
pro vyhledávání: '"Nulsen, P"'
Autor:
Ubertosi, F., Gong, Y., Nulsen, P., Leahy, J. P., Gitti, M., McNamara, B. R., Gaspari, M., Singha, M., O'Dea, C., Baum, S.
We present a detailed analysis of jet activity in the radio galaxy 3C348 at the center of the galaxy cluster Hercules A. We use archival Chandra data to investigate the jet-driven shock front, the radio-faint X-ray cavities, the eastern jet, and the
Externí odkaz:
http://arxiv.org/abs/2411.12804
Autor:
Poliszczuk, Artem, Wilkins, Dan, Allen, Steven W., Miller, Eric D., Chattopadhyay, Tanmoy, Schneider, Benjamin, Darve, Julien Eric, Bautz, Marshall, Falcone, Abe, Foster, Richard, Grant, Catherine E., Herrmann, Sven, Kraft, Ralph, Morris, R. Glenn, Nulsen, Paul, Orel, Peter, Schellenberger, Gerrit, Stueber, Haley R.
Traditional cosmic ray filtering algorithms used in X-ray imaging detectors aboard space telescopes perform event reconstruction based on the properties of activated pixels above a certain energy threshold, within 3x3 or 5x5 pixel sliding windows. Th
Externí odkaz:
http://arxiv.org/abs/2407.16768
Autor:
Wilkins, D. R., Poliszczuk, A., Schneider, B., Miller, E. D., Allen, S. W., Bautz, M., Chattopadhyay, T., Falcone, A. D., Foster, R., Grant, C. E., Herrmann, S., Kraft, R., Morris, R. G., Nulsen, P., Orel, P., Schellenberger, G.
Publikováno v:
Proc. SPIE, 2024, 13093-65
Bringing artificial intelligence (AI) alongside next-generation X-ray imaging detectors, including CCDs and DEPFET sensors, enhances their sensitivity to achieve many of the flagship science cases targeted by future X-ray observatories, based upon lo
Externí odkaz:
http://arxiv.org/abs/2407.16764
Autor:
Domínguez-Fernández, Paola, ZuHone, John, Weinberger, Rainer, Bellomi, Elena, Hernquist, Lars, Nulsen, Paul, Brunetti, Gianfranco
AGN bubbles in cool-core galaxy clusters are believed to significantly facilitate the transport of cosmic ray electrons (CRe) throughout the cluster. Recent radio observations are revealing complex morphologies of cluster diffuse emission, potentiall
Externí odkaz:
http://arxiv.org/abs/2406.19681
Autor:
Liu, Wenhao, Sun, Ming, Voit, G. Mark, Lal, Dharam Vir, Nulsen, Paul, Gaspari, Massimo, Sarazin, Craig, Ehlert, Steven, Zheng, Xianzhong
Strong AGN heating provides an alternative means for the disruption of cluster cool cores (CCs) to cluster mergers. In this work we present a systematic Chandra study of a sample of 108 nearby ($z<0.1$) galaxy clusters, to investigate the effect of A
Externí odkaz:
http://arxiv.org/abs/2405.09738
Autor:
Romero, Charles E., Gaspari, Massimo, Schellenberger, Gerrit, Benson, Bradford A., Bleem, Lindsey E., Bulbul, Esra, Klein, Matthias, Kraft, Ralph, Nulsen, Paul, Reichardt, Christian L., Salvati, Laura, Somboonpanyakul, Taweewat, Su, Yuanyuan
Studies of surface brightness fluctuations in the intracluster medium (ICM) present an indirect probe of turbulent properties such as the turbulent velocities, injection scales, and the slope of the power spectrum of fluctuations towards smaller scal
Externí odkaz:
http://arxiv.org/abs/2404.04373
We apply a toy model based on 'pendulum waves' to gas sloshing in galaxy clusters. Starting with a galaxy cluster potential filled with a hydrostatic intra-cluster medium (ICM), we perturb all ICM by an initial small, unidirectional velocity, i.e., a
Externí odkaz:
http://arxiv.org/abs/2402.18632
Autor:
Russell, H. R., Nulsen, P. E. J., Fabian, A. C., Braben, T. E., Brandt, W. N., Clews, L., McDonald, M., Reynolds, C. S., Sanders, J. S., Veilleux, S.
H1821+643 is the nearest quasar hosted by a galaxy cluster. The energy output by the quasar, in the form of intense radiation and radio jets, is captured by the surrounding hot atmosphere. Here we present a new deep Chandra observation of H1821+643 a
Externí odkaz:
http://arxiv.org/abs/2401.03022
Autor:
Sarkar, Arnab, Andrade-Santos, Felipe, van Weeren, Reinout J., Kraft, Ralph P., Hoang, Duy N., Shimwell, Timothy W., Nulsen, Paul, Forman, William, Randall, Scott, Su, Yuanyuan, Chakraborty, Priyanka, Jones, Christine, Miller, Eric, Bautz, Mark, Grant, Catherine E.
We present a 368 ks deep Chandra observation of Abell~1240, a binary merging galaxy cluster at a redshift of 0.195 with two Brightest Cluster Galaxies (BCGs) may have passed each other 0.3 Gyr ago. Building upon previous investigations involving GMRT
Externí odkaz:
http://arxiv.org/abs/2401.02000
Autor:
Omoruyi, Osase, Tremblay, Grant R., Combes, Francoise, Davis, Timothy A., Gladders, Michael D., Vikhlinin, Alexey, Nulsen, Paul, Kharb, Preeti, Baum, Stefi A., O'Dea, Christopher P., Sharon, Keren, Terrazas, Bryan A., Nevin, Rebecca, Schechter, Aimee L., Zuhone, John A., McDonald, Michael, Dahle, Håkon, Bayliss, Matthew B., Connor, Thomas, Florian, Michael, Rigby, Jane R., Vaddi, Sravani
With two central galaxies engaged in a major merger and a remarkable chain of 19 young stellar superclusters wound around them in projection, the galaxy cluster SDSS J1531+3414 ($z=0.335$) offers an excellent laboratory to study the interplay between
Externí odkaz:
http://arxiv.org/abs/2312.06762