Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Wik, D. R."'
Temperature measurements of galaxy clusters are used to determine their masses, which in turn are used to determine cosmological parameters. However, systematic differences between the temperatures measured by different telescopes imply a significant
Externí odkaz:
http://arxiv.org/abs/2211.00672
Autor:
Giacintucci, S., Markevitch, M., Johnston-Hollitt, M., Wik, D. R., Wang, Q. H. S., Clarke, T. E.
The Ophiuchus galaxy cluster exhibits a curious concave gas density discontinuity at the edge of its cool core. It was discovered in the Chandra X-ray image by Werner and collaborators, who considered a possibility of it being a boundary of an AGN-in
Externí odkaz:
http://arxiv.org/abs/2002.01291
Autor:
Cova, F., Gastaldello, F., Wik, D. R., Boschin, W., Botteon, A., Brunetti, G., Buote, D. A., De Grandi, S., Eckert, D., Ettori, S., Feretti, L., Gaspari, M., Ghizzardi, S., Giovannini, G., Ghirardi, M., Govoni, F., Molendi, S., Murgia, M., Rossetti, M., Vacca, V.
Publikováno v:
A&A 628, A83 (2019)
We present the results of a joint XMM-Newton and NuSTAR observation (200 ks) of the galaxy cluster Abell 523 at $z=0.104$. The peculiar morphology of the cluster radio halo and its outlier position in the radio power P(1.4 GHz) - X-ray luminosity pla
Externí odkaz:
http://arxiv.org/abs/1906.07730
Autor:
Vulic, N., Hornschemeier, A. E., Antoniou, V., Basu-Zych, A. R., Binder, B., Fornasini, F. M., Furst, F., Haberl, F., Heida, M., Lehmer, B. D., Maccarone, T. J., Ptak, A. F., Sivakoff, G. R., Tzanavaris, P., Wik, D. R., Williams, B. F., Wilms, J., Yukita, M., Zezas, A.
What are the most important conditions and processes governing the growth of stellar-origin compact objects? The identification of compact object type as either black hole (BH) or neutron star (NS) is fundamental to understanding their formation and
Externí odkaz:
http://arxiv.org/abs/1903.09858
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:
Santra, R., Kale, R., Giacintucci, S., Wik, D. R., Venturi, T., Dallacasa, D., Cassano, R., Brunetti, G., Joshi, D. C.
Publikováno v:
Astrophysical Journal; 11/20/2024, Vol. 976 Issue 1, p1-12, 12p
Autor:
Yukita, M., Hornschemeier, A. E., Lehmer, B. D., Ptak, A., Wik, D. R., Zezas, A., Antoniou, V., Maccarone, T. J., Replicon, V., Tyler, J. B., Venters, T., Argo, M. K., Bechtol, K., Boggs, S., Christensen, F. E., Craig, W. W., Hailey, C., Harrison, F., Krivonos, R., Kuntz, K., Stern, D., Zhang, W. W.
We present results from sensitive, multi-epoch NuSTAR observations of the late-type star-forming galaxy M83 (d=4.6 Mpc), which is the first investigation to spatially resolve the hard (E>10 keV) X-ray emission of this galaxy. The nuclear region and ~
Externí odkaz:
http://arxiv.org/abs/1604.07441
Autor:
Civano, F., Hickox, R. C., Puccetti, S., Comastri, A., Mullaney, J. R., Zappacosta, L., LaMassa, S. M., Aird, J., Alexander, D. M., Ballantyne, D. R., Bauer, F. E., Brandt, W. N., Boggs, S. E., Christensen, F. E., Craig, W. W., Del-Moro, A., Elvis, M., Forster, K., Gandhi, P., Grefenstette, B. W., Hailey, C. J., Harrison, F. A., Lansbury, G. B., Luo, B., Madsen, K., Saez, C., Stern, D., Treister, E., Urry, M. C., Wik, D. R., Zhang, W.
Publikováno v:
ApJ, 808, 185 (2015)
To provide the census of the sources contributing to the X-ray background peak above 10 keV, NuSTAR is performing extragalactic surveys using a three-tier "wedding cake" approach. We present the NuSTAR survey of the COSMOS field, the medium sensitivi
Externí odkaz:
http://arxiv.org/abs/1511.04185
Autor:
Mullaney, J. R., Del-Moro, A., Aird, J., Alexander, D. M., Civano, F. M., Hickox, R. C., Lansbury, G. B., Ajello, M., Assef, R., Ballantyne, D. R., Balokovic, M., Bauer, F. E., Brandt, W. N., Boggs, S. E., Brightman, M., Christensen, F. E., Comastri, A., Craig, W. W., Elvis, M., Forster, K., Gandhi, P., Grefenstette, B. W., Hailey, C. J., Harrison, F. A., Koss, M., LaMassa, S. M., Luo, B., Madsen, K. K., Puccetti, S., Saez, C., Stern, D., Treister, E., Urry, C. M., Wik, D. R., Zappacosta, L., Zhang, W.
Publikováno v:
ApJ , 808, 184 (2015)
We present initial results and the source catalog from the NuSTAR survey of the Extended Chandra Deep Field South (hereafter, ECDFS) - currently the deepest contiguous component of the NuSTAR extragalactic survey program. The survey covers the full ~
Externí odkaz:
http://arxiv.org/abs/1511.04186
Autor:
Aird, J., Alexander, D. M., Ballantyne, D. R., Civano, F., Del-Moro, A., Hickox, R. C., Lansbury, G. B., Mullaney, J. R., Bauer, F. E., Brandt, W. N., Comastri, A., Fabian, A. C., Gandhi, P., Harrison, F. A., Luo, B., Stern, D., Treister, E., Zappacosta, L., Ajello, M., Assef, R., Boggs, S. E., Brightman, M., Christensen, F. E., Craig, W. W., Elvis, M., Forster, K., Balokovic, M., Grefenstette, B. W., Hailey, C. J., Koss, M., LaMassa, S. M., Madsen, K. K., Puccetti, S., Saez, C., Urry, C. M., Wik, D. R., Zhang, W.
We present the first direct measurements of the rest-frame 10-40 keV X-ray luminosity function (XLF) of Active Galactic Nuclei (AGNs) based on a sample of 94 sources at 0.1 < z <3, selected at 8-24 keV energies from sources in the NuSTAR extragalacti
Externí odkaz:
http://arxiv.org/abs/1511.04184