Zobrazeno 51 - 60
of 316
pro vyhledávání: '"ETTORI, STEFANO"'
Autor:
Fujita, Yutaka, Umetsu, Keiichi, Ettori, Stefano, Rasia, Elena, Okabe, Nobuhiro, Meneghetti, Massimo
Publikováno v:
The Astrophysical Journal, Volume 863, Issue 1, article id. 37, 9 pp. (2018)
Observations and numerical simulations have shown that the relation between the mass scaled with the critical density of the universe and the X-ray temperature of galaxy clusters is approximately represented by $M_\Delta \propto T_X^{3/2}$ (e.g. $\De
Externí odkaz:
http://arxiv.org/abs/1804.05070
Autor:
Umetsu, Keiichi, Sereno, Mauro, Tam, Sut-Ieng, Chiu, I-Non, Fan, Zuhui, Ettori, Stefano, Gruen, Daniel, Okumura, Teppei, Medezinski, Elinor, Donahue, Megan, Meneghetti, Massimo, Frye, Brenda, Koekemoer, Anton, Broadhurst, Tom, Zitrin, Adi, Balestra, Italo, Benitez, Narciso, Higuchi, Yuichi, Melchior, Peter, Mercurio, Amata, Merten, Julian, Molino, Alberto, Nonino, Mario, Postman, Marc, Rosati, Piero, Sayers, Jack, Seitz, Stella
Publikováno v:
ApJ, 860, 104 (2018)
We reconstruct the two-dimensional (2D) matter distributions in 20 high-mass galaxy clusters selected from the CLASH survey by using the new approach of performing a joint weak lensing analysis of 2D shear and azimuthally averaged magnification measu
Externí odkaz:
http://arxiv.org/abs/1804.00664
Autor:
Chiu, I-Non, Umetsu, Keiichi, Sereno, Mauro, Ettori, Stefano, Meneghetti, Massimo, Merten, Julian, Sayers, Jack, Zitrin, Adi
We perform a three-dimensional triaxial analysis of 16 X-ray regular and 4 high-magnification galaxy clusters selected from the CLASH survey by combining two-dimensional weak-lensing and central strong-lensing constraints. In a Bayesian framework, we
Externí odkaz:
http://arxiv.org/abs/1804.00676
Autor:
Sereno, Mauro, Umetsu, Keiichi, Ettori, Stefano, Sayers, Jack, Chiu, I-Non, Meneghetti, Massimo, Vega-Ferrero, Jesús, Zitrin, Adi
The $\Lambda$CDM model of structure formation makes strong predictions on concentration and shape of DM (dark matter) halos, which are determined by mass accretion processes. Comparison between predicted shapes and observations provides a geometric t
Externí odkaz:
http://arxiv.org/abs/1804.00667
Autor:
Lovisari, Lorenzo, Forman, William R., Jones, Christine, Ettori, Stefano, Andrade-Santos, Felipe, Arnaud, Monique, Démoclès, Jessica, Pratt, Gabriel W., Randall, Scott, Kraft, Ralph
X-ray observations show that galaxy clusters have a very large range of morphologies. The most disturbed systems which are good to study how clusters form and grow and to test physical models, may potentially complicate cosmological studies because t
Externí odkaz:
http://arxiv.org/abs/1708.02590
The possibly unbiased selection process in surveys of the Sunyaev Zel'dovich effect can unveil new populations of galaxy clusters. We performed a weak lensing analysis of the PSZ2LenS sample, i.e. the PSZ2 galaxy clusters detected by the Planck missi
Externí odkaz:
http://arxiv.org/abs/1703.06886
Autor:
Iqbal, Asif, Majumdar, Subhabrata, Nath, Biman B., Ettori, Stefano, Eckert, Dominique, Malik, Manzoor A.
Publikováno v:
MNRAS, 472, 713-726 (2017)
We estimate the "non-gravitational" entropy-injection profiles, $\Delta K$, and the resultant energy feedback profiles, $\Delta E$, of the intracluster medium for 17 clusters using their Planck SZ and ROSAT X-Ray observations, spanning a large radial
Externí odkaz:
http://arxiv.org/abs/1703.00028
Autor:
Sereno, Mauro, Ettori, Stefano, Meneghetti, Massimo, Sayers, Jack, Umetsu, Keiichi, Merten, Julian, Chiu, I-Non, Zitrin, Adi
Multi-wavelength techniques can probe the distribution and the physical properties of baryons and dark matter in galaxy clusters from the inner regions out to the peripheries. We present a full three-dimensional analysis combining strong and weak len
Externí odkaz:
http://arxiv.org/abs/1702.00795
Akademický článek
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Autor:
Iqbal, Asif, Majumdar, Subhabrata, Nath, Biman B., Ettori, Stefano, Eckert, Dominique, Malik, Manzoor A.
Publikováno v:
MNRASL , 464, L99-L103 (2017)
Non-gravitational feedback affects the nature of the intra-cluster medium (ICM). X-ray cooling of the ICM and in situ energy feedback from AGN's and SNe as well as {\it preheating} of the gas at epochs preceding the formation of clusters are proposed
Externí odkaz:
http://arxiv.org/abs/1606.00014