Zobrazeno 1 - 10
of 235
pro vyhledávání: '"Biffi V"'
Temperature of the hot gas in galaxy clusters is known to be a reliable proxy for the their total gravitating mass, allowing one to use spectroscopic X-ray observations for halo mass function measurements. Data of shallow wide area surveys, however,
Externí odkaz:
http://arxiv.org/abs/2408.12026
Autor:
Marini, I., Popesso, P., Lamer, G., Dolag, K., Biffi, V., Vladutescu-Zopp, S., Dev, A., Toptun, V., Bulbul, E., Comparat, J., Malavasi, N., Merloni, A., Mroczkowski, T., Ponti, G., Seppi, R., Shreeram, S., Zhang, Y.
Publikováno v:
A&A 689, A7 (2024)
The eROSITA will deliver an unprecedented volume of X-ray survey observations, 20-30 times more sensitive than ROSAT in the soft band (0.5-2 keV) and for the first time imaging in the hard band (2-10 keV) including galaxy clusters and groups along wi
Externí odkaz:
http://arxiv.org/abs/2404.12719
Autor:
Bahar, Y. E., Bulbul, E., Ghirardini, V., Sanders, J. S., Zhang, X., Liu, A., Clerc, N., Artis, E., Balzer, F., Biffi, V., Bose, S., Comparat, J., Dolag, K., Garrel, C., Hadzhiyska, B., Hernández-Aguayo, C., Hernquist, L., Kluge, M., Krippendorf, S., Merloni, A., Nandra, K., Pakmor, R., Popesso, P., Ramos-Ceja, M., Seppi, R., Springel, V., Weller, J., Zelmer, S.
We investigate the impact of AGN feedback, on the entropy and characteristic temperature measurements of galaxy groups detected in the SRG/eROSITA's first All-Sky Survey (eRASS1) to shed light on the characteristics of the feedback mechanisms. We ana
Externí odkaz:
http://arxiv.org/abs/2401.17276
Autor:
ZuHone, J., Bahar, Y. E., Biffi, V., Dolag, K., Sanders, J., Bulbul, E., Liu, T., Dauser, T., König, O., Zhang, X., Ghirardini, V.
Publikováno v:
A&A 675, A150 (2023)
The number density of galaxy clusters as a function of mass and redshift is a sensitive function of the cosmological parameters. To use clusters for cosmological parameter studies, it is necessary to determine their masses as accurately as possible,
Externí odkaz:
http://arxiv.org/abs/2212.11028
Autor:
Seppi, R., Comparat, J., Nandra, K., Dolag, K., Biffi, V., Bulbul, E., Liu, A., Ghirardini, V., Ider-Chitham, J.
Publikováno v:
A&A 671, A57 (2023)
The characterization of the dynamical state of clusters is key to study their evolution, their selection, and use them as a cosmological probe. The offsets between different definitions of the center have been used to estimate the cluster disturbance
Externí odkaz:
http://arxiv.org/abs/2212.10107
Autor:
Sanders, J. S., Biffi, V., Brüggen, M., Bulbul, E., Dennerl, K., Dolag, K., Erben, T., Freyberg, M., Gatuzz, E., Ghirardini, V., Hoang, D. N., Klein, M., Liu, A., Merloni, A., Pacaud, F., Ramos-Ceja, M. E., Reiprich, T. H., ZuHone, J. A.
Publikováno v:
A&A 661, A36 (2022)
Abell 3266 is one of the X-ray brightest galaxy clusters in the sky and is a well-known merging system. Using the ability of the eROSITA telescope onboard SRG (Spectrum R\"ontgen Gamma) to observe a wide field with a single pointing, we analysed a ne
Externí odkaz:
http://arxiv.org/abs/2106.14534
Autor:
Liu, A., Bulbul, E., Ghirardini, V., Liu, T., Klein, M., Clerc, N., Oezsoy, Y., Ramos-Ceja, M. E., Pacaud, F., Comparat, J., Okabe, N., Bahar, Y. E., Biffi, V., Brunner, H., Brueggen, M., Buchner, J., Chitham, J. Ider, Chiu, I., Dolag, K., Gatuzz, E., Gonzalez, J., Hoang, D. N., Lamer, G., Merloni, A., Nandra, K., Oguri, M., Ota, N., Predehl, P., Reiprich, T. H., Salvato, M., Schrabback, T., Sanders, J. S., Seppi, R., Thibaud, Q.
Publikováno v:
A&A 661, A2 (2022)
The eROSITA Final Equatorial-Depth Survey has been carried out during the PV phase of the SRG/eROSITA telescope and completed in November 2019. This survey is designed to provide the first eROSITA-selected sample of galaxy clusters and groups and to
Externí odkaz:
http://arxiv.org/abs/2106.14518
Autor:
Ghirardini, V., Bulbul, E., Hoang, D. N., Klein, M., Okabe, N., Biffi, V., Bruggen, M., Ramos-Ceja, M. E., Comparat, J., Oguri, M., Shimwell, T. W., Basu, K., Bonafede, A., Botteon, A., Brunetti, G., Cassano, R., de Gasperin, F., Dennerl, K., Gatuzz, E., Gastaldello, F., Intema, H., Merloni, A., Nandra, K., Pacaud, F., Predehl, P., Reiprich, T. H., Robrade, J., Röttgering, H., van Weeren, J. Sanders R. J., Williams, W. L.
Publikováno v:
A&A 647, A4 (2021)
We examine the X-ray, optical, and radio properties for the members clusters of a new supercluster discovered during the SRG/eROSITA Performance Verification phase. In the 140 deg2 eROSITA Final Equatorial Depth Survey (eFEDS) field we detect a previ
Externí odkaz:
http://arxiv.org/abs/2012.11607
Autor:
Reiprich, T. H., Veronica, A., Pacaud, F., Ramos-Ceja, M. E., Ota, N., Sanders, J., Kara, M., Erben, T., Klein, M., Erler, J., Kerp, J., Hoang, D. N., Brüggen, M., Marvil, J., Rudnick, L., Biffi, V., Dolag, K., Aschersleben, J., Basu, K., Brunner, H., Bulbul, E., Dennerl, K., Eckert, D., Freyberg, M., Gatuzz, E., Ghirardini, V., Käfer, F., Merloni, A., Migkas, K., Nandra, K., Predehl, P., Robrade, J., Salvato, M., Whelan, B., Diaz-Ocampo, A., Hernandez-Lang, D., Zenteno, A., Brown, M. J. I., Collier, J. D., Diego, J. M., Hopkins, A. M., Kapinska, A., Koribalski, B., Mroczkowski, T., Norris, R. P., O'Brien, A., Vardoulaki, E.
Publikováno v:
A&A 647, A2 (2021)
We used dedicated SRG/eROSITA X-ray, ASKAP/EMU radio, and DECam optical observations of a 15 sq.deg region around the interacting galaxy cluster system A3391/95 to study the warm-hot gas in cluster outskirts and filaments, the surrounding large-scale
Externí odkaz:
http://arxiv.org/abs/2012.08491
Autor:
Mernier, F., Cucchetti, E., Tornatore, L., Biffi, V., Pointecouteau, E., Clerc, N., Peille, P., Rasia, E., Barret, D., Borgani, S., Bulbul, E., Dauser, T., Dolag, K., Ettori, S., Gaspari, M., Pajot, F., Roncarelli, M., Wilms, J., Noûs, C.
Publikováno v:
A&A 642, A90 (2020)
The chemical enrichment of the Universe at all scales is related to stellar winds and explosive supernovae phenomena. Metals produced by stars and later spread at the mega-parsec scale through the intra-cluster medium (ICM) become a fossil record of
Externí odkaz:
http://arxiv.org/abs/2007.15910