Examinando por Autor "Altieri, B."

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Acceso Abierto
ALMA 1.3 mm Survey of Lensed Submillimeter Galaxies Selected by Herschel: Discovery of Spatially Extended SMGs and Implications
(IOP Science Publishing, 2021-02-24) Sun, F.; Egami, E.; Rawle, T. D.; Walth, G. L.; Smail, I.; Dessauges-Zavadsky, M.; Pérez González, P. G.; Richard, J.; Combes, F.; Ebeling, H.; Pelló, R.; Werf, P. V.; Altieri, B.; Boone, F.; Cava, A.; Chapman, S. C.; Clément, B.; Finoguenov, A.; Nakajima, K.; Rujopakarn, W.; Schaerer, D.; Valtchanov, I.; Science and Technology Facilities Council (STFC); National Aeronautics and Space Administration (NASA); Sun, F. [0000-0002-4622-6617]; Rawle, T. D. [0000-0002-7028-5588]; Walth, G. L. [0000-0002-6313-6808]; Smail, I. [0000-0003-3037-257X]; Dessauges-Zavadsky, M. [0000-0003-0348-2917]; Pérez González, P. G. [0000-0003-4528-5639]; Richard, J. [0000-0001-5492-1049]; Combes, F. [0000-0003-2658-7893]; Ebeling, H. [0000-0001-8249-2739]; Pelló, R. [0000-0003-0858-6109]; Werf, P. V. [0000-0001-5434-5942]; Altieri, B. [0000-0003-3936-0284]; Cava, A. [0000-0002-4821-1275]; Finoguenov, A. [0000-0002-4606-5403]; Nakajima, K. [0000-0003-2965-5070]; Rujopakarn, W. [0000-0002-0303-499X]; Schaerer, D. [0000-0001-7144-7182]; Valtchanov, I. [0000-0001-9930-7886]
We present an ALMA 1.3 mm (Band 6) continuum survey of lensed submillimeter galaxies (SMGs) at z = 1.0 to ∼3.2 with an angular resolution of ∼0farcs2. These galaxies were uncovered by the Herschel Lensing Survey and feature exceptionally bright far-infrared continuum emission (Speak ≳ 90 mJy) owing to their lensing magnification. We detect 29 sources in 20 fields of massive galaxy clusters with ALMA. Using both the Spitzer/IRAC (3.6/4.5 μm) and ALMA data, we have successfully modeled the surface brightness profiles of 26 sources in the rest-frame near- and far-infrared. Similar to previous studies, we find the median dust-to-stellar continuum size ratio to be small (Re,dust/Re,star = 0.38 ± 0.14) for the observed SMGs, indicating that star formation is centrally concentrated. This is, however, not the case for two spatially extended main-sequence SMGs with a low surface brightness at 1.3 mm (≲0.1 mJy arcsec−2), in which the star formation is distributed over the entire galaxy (Re,dust/Re,star > 1). As a whole, our SMG sample shows a tight anticorrelation between (Re,dust/Re,star) and far-infrared surface brightness (ΣIR) over a factor of ≃1000 in ΣIR. This indicates that SMGs with less vigorous star formation (i.e., lower ΣIR) lack central starburst and are likely to retain a broader spatial distribution of star formation over the whole galaxies (i.e., larger Re,dust/Re,star). The same trend can be reproduced with cosmological simulations as a result of central starburst and potentially subsequent "inside-out" quenching, which likely accounts for the emergence of compact quiescent galaxies at z ∼ 2.
Acceso Abierto
The XXL Survey XLIV. Sunyaev-Zel’dovich mapping of a low-mass cluster at z ∼ 1: a multi-wavelength approach
(EDP Sciences, 2020-10-13) Ricci, C.; Adam, R.; Eckert, Dominique; Ade, P.; André, P.; Andrianasolo, A.; Altieri, B.; Aussel, H.; Beelen, A.; Benoist, C.; Benoit, A.; Berta, S.; Bideaud, A.; Birkinshaw, M.; Bourrion, O.; Boutigny, D.; Bremer, M.; Calvo, M.; Cappi, A.; Chiappetti, L.; Catalano, A.; De Petris, M.; Désert, F. X.; Doyle, S.; Driessen, E. F. C.; Faccioli, L.; Ferrari, C.; Fotopoulou, S.; Gastaldello, F.; Giles, P.; Gómez, A.; Goupy, J.; Hahn, O.; Horellou, C.; Kéruzoré, F.; Koulouridis, E.; Kramer, C.; Ladjelate, B.; Lagache, G.; Leclercq, S.; Lestrade, J. F.; Marcías Pérez, J. F.; Maughan, B.; Maurogordato, S.; Mauskopf, P.; Monfardini, A.; Pacaud, F.; Perotto, L.; Pierre, M.; Pisano, G.; Pompei, E.; Ponthieu, N.; Revéret, V.; Ritacco, A.; Roussel, H.; Ruppin, F.; Sánchez Portal, M.; Schuster, K.; Sereno, M.; Shu, S.; Slievers, A.; Tucker, C.; Umetsu, K.; Romero Guzman, Catalina; European Research Council (ERC); Agenzia Spaziale Italiana (ASI); European Commission (EC); Umetsu, K. [0000-0002-7196-4822]; Koulouridis, E. [0000-0002-9423-3723]; Altieri, B. [0000-0003-3936-0284]; Giles, P. [0000-0003-4937-8453]; Ricci, M. [0000-0002-3645-9652]; Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737
High-mass clusters at low redshifts have been intensively studied at various wavelengths. However, while more distant objects at lower masses constitute the bulk population of future surveys, their physical state remain poorly explored to date. In this paper, we present resolved observations of the Sunyaev-Zel’dovich (SZ) effect, obtained with the NIKA2 camera, towards the cluster of galaxies XLSSC 102, a relatively low-mass system (M500 ∼ 2 × 1014 M⊙) at z = 0.97 detected from the XXL survey. We combine NIKA2 SZ data, XMM-Newton X-ray data, and Megacam optical data to explore, respectively, the spatial distribution of the gas electron pressure, the gas density, and the galaxies themselves. We find significant offsets between the X-ray peak, the SZ peak, the brightest cluster galaxy, and the peak of galaxy density. Additionally, the galaxy distribution and the gas present elongated morphologies. This is interpreted as the sign of a recent major merging event, which induced a local boost of the gas pressure towards the north of XLSSC 102 and stripped the gas out of the galaxy group. The NIKA2 data are also combined with XXL data to construct the thermodynamic profiles of XLSSC 102, obtaining relatively tight constraints up to about ∼r500, and revealing properties that are typical of disturbed systems. We also explore the impact of the cluster centre definition and the implication of local pressure substructure on the recovered profiles. Finally, we derive the global properties of XLSSC 102 and compare them to those of high-mass-and-low-redshift systems, finding no strong evidence for non-standard evolution. We also use scaling relations to obtain alternative mass estimates from our profiles. The variation between these different mass estimates reflects the difficulty to accurately measure the mass of low-mass clusters at z ∼ 1, especially with low signal-to-noise ratio data and for a disturbed system. However, it also highlights the strength of resolved SZ observations alone and in combination with survey-like X-ray data. This is promising for the study of high redshift clusters from the combination of eROSITA and high resolution SZ instruments and will complement the new generation of optical surveys from facilities such as LSST and Euclid.