Planck intermediate results. VIII. Filaments between interacting clusters by Collaboration, P, Ade, P, Aghanim, N, Arnaud, M, Ashdown, M, Atrio-Barandela, F, Aumont, J, Baccigalupi, C, Balbi, A, Banday, A, Barreiro, R, Bartlett, J, Battaner, E, Benabed, K, Benoît, A, Bernard, J, Bersanelli, M, Bhatia, R, Bikmaev, I, Böhringer, H, Bonaldi, A, Bond, JR, Borrill, J, Bouchet, F, Bourdin, H

“…Using the Planck data we construct a local map of the tSZ effect centered on each pair of galaxy clusters. ROSAT data is used to construct X-ray maps of these pairs. …”

Planck intermediate results. X. Physics of the hot gas in the Coma cluster by Collaboration, P, Ade, P, Aghanim, N, Arnaud, M, Ashdown, M, Atrio-Barandela, F, Aumont, J, Baccigalupi, C, Balbi, A, Banday, A, Barreiro, R, Bartlett, J, Battaner, E, Benabed, K, Benoît, A, Bernard, J, Bersanelli, M, Bikmaev, I, Böhringer, H, Bonaldi, A, Bond, JR, Borrill, J, Bouchet, F, Bourdin, H, Brown, M

“…These features are consistent with the presence of shock fronts at these radii, and indeed the western feature was previously noticed in the ROSAT PSPC mosaic as well as in the radio. Using Planck y profiles extracted from corresponding sectors we find pressure jumps of 4.5+0.4-0.2 and 5.0+1.3-0.1 in the west and southeast, respectively. …”

Planck Intermediate Results. IV. The XMM-Newton validation programme for new Planck galaxy clusters by Collaboration, P, Ade, P, Aghanim, N, Arnaud, M, Ashdown, M, Aumont, J, Baccigalupi, C, Balbi, A, Banday, A, Barreiro, R, Bartlett, J, Battaner, E, Benabed, K, Benoît, A, Bernard, J, Bersanelli, M, Bikmaev, I, Böhringer, H, Bonaldi, A, Bond, JR, Borgani, S, Borrill, J, Bouchet, F, Brown, M, Burigana, C

“…The candidates were selected using ancillary data flags derived from the ROSAT All Sky Survey (RASS) and Digitized Sky Survey all-sky maps, with the aim of pushing into the low SZ flux, high-z regime and testing RASS flags as indicators of candidate reliability. 14 new clusters were detected by XMM, including 2 double systems. …”