The 700 ks Chandra Spiderweb Field I: evidence for widespread nuclear activity in the Protocluster
| Autor: | Tozzi, P., Pentericci, L., Gilli, R., Pannella, M., Fiore, F., Miley, G., Nonino, M., Röttgering, H. J.A., Strazzullo, V., Anderson, C. S., Borgani, S., Calabrò, A., Carilli, C., Dannerbauer, H., Di Mascolo, L., Feruglio, C., Gobat, R., Jin, S., Liu, A., Mroczkowski, T., Norman, C., Rasia, E., Rosati, P., Saro, A. |
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| Přispěvatelé: | ITA |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Astronomy & Astrophysics, 662:A54 Tozzi, P, Pentericci, L, Gilli, R, Pannella, M, Fiore, F, Miley, G, Nonino, M, Röttgering, H J A, Strazzullo, V, Anderson, C S, Borgani, S, Calabrò, A, Carilli, C, Dannerbauer, H, Di Mascolo, L, Feruglio, C, Gobat, R, Jin, S, Liu, A, Mroczkowski, T, Norman, C, Rasia, E, Rosati, P & Saro, A 2022, ' The 700 ks Chandra Spiderweb Field : I. Evidence for widespread nuclear activity in the protocluster ', Astronomy and Astrophysics, vol. 662, A54 . https://doi.org/10.1051/0004-6361/202142333 |
| DOI: | 10.1051/0004-6361/202142333 |
| Popis: | (Abridged) We present an analysis of the 700 ks Chandra ACIS-S observation of the field around the Spiderweb Galaxy at z=2.156, focusing on the nuclear activity in the associated large-scale environment. We identify unresolved X-ray sources down to flux limits of 1.3X10^{-16} and 3.9X10^{-16} erg/s/cm^2 in the soft and hard band, respectively. We search for counterparts in the optical, NIR and submm bands to identify X-ray sources belonging to the protocluster. We detect 107 X-ray unresolved sources within 5 arcmin (corresponding to 2.5 Mpc) of J1140-2629, among which 13 have optical counterparts with spectroscopic redshift 2.11~1.84+-0.04. The best-fit intrinsic absorption for 5 protocluster X-ray members is N_H>10^{23} cm^{-2}, while other 6 have upper limits of the order of fewX10^{22} cm^{-2}. Two sources can only be fitted with very flat \Gamma10.5, corresponding to an enhancement of 6.0^{+9.0}_{-3.0} with respect to the COSMOS field at comparable redshifts and stellar mass range. We conclude that the galaxy population in the Spiderweb Protocluster is characterized by enhanced X-ray nuclear activity triggered by environmental effects on Mpc scales. Comment: Astronomy & Astrophysics. Minor changes in this version. Version accepted in A&A |
| Databáze: | OpenAIRE |
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