Browsing by Author "Decarli, R."

Now showing 1 - 17 of 17
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    ALMA spectroscopic survey in the Hubble Ultra Deep Field: Continuum number counts, resolved 1.2-mm extragalactic background, and properties of the faintest dusty star forming galaxies
    (2016) Bauer, Franz Erik; Aravena, M.; Decarli, R.; Walter, F.; Da Cunha, E.; Carilli, C.; Daddi, E.; Elbaz, D.; Ivison, R.; Riechers, D.; Smail, I.; Weiss, A.; Anguita, T.; Bell, E.; Bertoldi, F.; Bacon, R.
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    ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Search for [CII] line and dust emission in 6 < z < 8 galaxies
    (2016) Aravena, M.; Decarli, R.; Walter, F.; Bouwens, R.; Oesch, P.; Carilli, C.; Bauer, Franz Erik; Da Cunha, E.; Daddi, E.; González, J.; Ivison, R.; Riechers, D.; Smail, I.; Swinbank, A.; Weiss, A.; Anguita, T.; Bacon, R.
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    Discovery of a galaxy overdensity around a powerful, heavily obscured FRII radio galaxy at z=1.7: star formation promoted by large-scale AGN feedback?
    (2019) Gilli, R.; Mignoli, M.; Peca, A.; Nanni, R.; Prandoni, I.; Liuzzo, E.; D'Amato, Q.; Brusa, M.; Calura, F.; Caminha, G. B.; Chiaberge, M.; Comastri, A.; Cucciati, O.; Cusano, F.; Grandi, P.; Decarli, R.; Lanzuisi, G.; Mannucci, F.; Pinna, E.; Tozzi, P.; Vanzella, E.; Vignali, C.; Vito, F.; Balmaverde, B.; Citro, A.; Cappelluti, N.; Zamorani, G.; Norman, C.
    We report the discovery of a galaxy overdensity around a Compton-thick Fanaroff-Riley type II (FRII) radio galaxy at z = 1:7 in the deep multiband survey around the z = 6.3 quasi-stellar object (QSO) SDSS J1030 +0524. Based on a 6 h VLT/MUSE and on a 4 h LBT/LUCI observation, we identify at least eight galaxy members in this structure with spectroscopic redshift z = 1 .687 1 .699, including the FRII galaxy at z = 1.699. Most members are distributed within 400 kpc from the FRII core. Nonetheless, the whole structure is likely much more extended, as one of the members was serendipitously found at similar to 800 kpc projected separation. The classic radio structure of the FRII itself extends for similar to 600 kpc across the sky. Most of the identified overdensity members are blue, compact galaxies that are actively forming stars at rates of similar to 8-60 M-circle dot yr(-1). For the brightest of them, a half-light radius of 2 .2 similar to 0 .8 kpc at 8000A rest-frame was determined based on adaptive optics-assisted observations with LBT/SOUL in the Ks band. We do not observe any strong galaxy morphological segregation or concentration around the FRII core. This suggests that the structure is far from being virialized and likely constitutes the progenitor of a local massive galaxy group or cluster caught in its main assembly phase. Based on a 500 ks Chandra ACIS-I observation, we found that the FRII nucleus hosts a luminous QSO (L2-10 keV = 1 .3 similar to 10(44) erg s(-1), intrinsic and rest-frame) that is obscured by Compton-thick absorption (N-H = 1.5 +/- 0 .6 x 10(24) cm(-2)). Under standard bolometric corrections, the total measured radiative power (L-rad similar to 4 x 10(45) erg s(-1)) is similar to the jet kinetic power that we estimated from radio observations at 150MHz (P-kin = 6.3 x 10(45) erg s(-1)), in agreement with what is observed in powerful jetted AGN. Our Chandra observation is the deepest so far for a distant FRII within a galaxy overdensity. It revealed significant di ffuse X-ray emission within the region that is covered by the overdensity. In particular, X-ray emission extending for similar to 240 kpc is found around the eastern lobe of the FRII. Four out of the six MUSE star-forming galaxies in the overdensity are distributed in an arc-like shape at the edge of this di ffuse X-ray emission. These objects are concentrated within 200 kpc in the plane of the sky and within 450 kpc in radial separation. Three of them are even more concentrated and fall within 60 kpc in both transverse and radial distance. The probability of observing four out of the six z = 1.7 sources by chance at the edge of the di ffuse emission is negligible. In addition, these four galaxies have the highest specific star formation rates of the MUSE galaxies in the overdensity and lie above the main sequence of field galaxies of equal stellar mass at z = 1.7. We propose that the di ffuse X-rays originate from an expanding bubble of gas that is shock heated by the FRII jet, and that star formation is promoted by the compression of the cold interstellar medium of the galaxies around the bubble, which may be remarkable evidence of positive AGN feedback on cosmological scales.
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    Chandra and Magellan/FIRE follow-up observations of PSO167-13: An X-ray weak QSO at z=6.515
    (2021) Vito, F.; Brandt, W. N.; Ricci, F.; Congiu, E.; Connor, T.; Banados, E.; Bauer, F. E.; Gilli, R.; Luo, B.; Mazzucchelli, C.; Mignoli, M.; Shemmer, O.; Vignali, C.; Calura, F.; Comastri, A.; Decarli, R.; Gallerani, S.; Nanni, R.; Brusa, M.; Cappelluti, N.; Civano, F.; Zamorani, G.
    Context. The discovery of hundreds of quasi-stellar objects (QSOs) in the first gigayear of the Universe powered by already grown supermassive black holes (SMBHs) challenges our knowledge of SMBH formation. In particular, investigations of z>6 QSOs that present notable properties can provide unique information on the physics of fast SMBH growth in the early Universe.Aims. We present the results of follow-up observations of the z=6.515 radio-quiet QSO PSO167-13, which is interacting with a close companion galaxy. The PSO167-13 system has recently been proposed to host the first heavily obscured X-ray source at high redshift. The goals of these new observations are to confirm the existence of the X-ray source and to investigate the rest-frame UV properties of the QSO.Methods. We observed the PSO167-13 system with Chandra/ACIS-S (177 ks) and obtained new spectroscopic observations (7.2 h) with Magellan/FIRE.Results. No significant X-ray emission is detected from the PSO167-13 system, suggesting that the obscured X-ray source previously tentatively detected was either due to a strong background fluctuation or is highly variable. The upper limit (90% confidence level) on the X-ray emission of PSO167-13 (L2-10 keV<8.3x10(43) erg s(-1)) is the lowest available for a z>6 QSO. The ratio between the X-ray and UV luminosity of alpha (ox)<-1.95 makes PSO167-13 a strong outlier from the (ox)-L-UV and L-X-L-bol relations. In particular, its X-ray emission is more than six times weaker than the expectation based on its UV luminosity. The new Magellan/FIRE spectrum of PSO167-13 is strongly affected by unfavorable sky conditions, but the tentatively detected C IV and Mg II emission lines appear strongly blueshifted.Conclusions. The most plausible explanations for the X-ray weakness of PSO167-13 are intrinsic weakness or small-scale absorption by Compton-thick material. The possible strong blueshift of its emission lines hints at the presence of nuclear winds, which could be related to its X-ray weakness.
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    The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field : CO Excitation and Atomic Carbon in Star-forming Galaxies at z=1-3
    (2020) Boogaard, L. A.; van der Werf, P.; Weiss, A.; Popping, G.; Decarli, R.; Walter, F.; Aravena, M.; Bouwens, R.; Riechers, D.; González López, Jorge; Smail, I.; Carilli, C.; Kaasinen, M.; Daddi, E.; Cox, P.; Diaz Santos, T.; Inami, H.; Cortes, P. C.; Wagg, J.
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    The ALMA spectroscopic survey in the hubble ultra deep field : evolution of the molecular gas in CO-selected galaxies
    (2019) Aravena, M.; Decarli, R.; González López, Jorge; Boogaard, L.; Walter, F.; Carilli, C.; Popping, G.; Weiss, A.; Assef, R.J.; Bacon, R.
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    The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field : The Nature of the Faintest Dusty Star-forming Galaxies
    (2020) Aravena, M.; Boogaard, L.; Gonzalez-Lopez, J.; Decarli, R.; Walter, F.; Carilli, C. L.; Smail, I.; Weiss, A.; Assef, R. J.; Bauer, Franz Erik; Bouwens, R. J.; Cortes, P. C.; Cox, P.; da Cunha, E.; Daddi, E.; Diaz Santos, T.; Inami, H.; Ivison, R.; Novak, M.; Popping, G.; Riechers, D.; van der Werf, P.; Wagg, J.
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    The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Constraining the Molecular Content at log (M-*/M-circle dot) ∼ 9.5 with CO Stacking of MUSE-detected z ∼ 1.5 Galaxies
    (2020) Inami, H.; Decarli, R.; Walter, F.; Weiss, A.; Carilli, C.; Aravena, M.; Boogaard, L.; González López, Jorge; Popping, G.; Bauer, Franz Erik; da Cunha, E.; Bacon, R.; Contini, T.; Cortes, P. C.; Cox, P.; Daddi, E.; Diaz Santos, T.; Kaasinen, M.; Riechers, D. A.; Wagg, J.; van der Werf, P.; Wisotzki, L.
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    The ALMA Spectroscopic Survey in the HUDF : A Model to Explain Observed 1.1 and 0.85 mm Dust Continuum Number Counts
    (2020) Popping, G.; Walter, F.; Behroozi, P.; Gozález López, José Ignacio; Hayward, C. C.; Somerville, R. S.; van der Werf, P.; Aravena, M.; Assef, R. J.; Boogaard, L.; Bauer, Franz Erik; Cortes, P. C.; Cox, P.; Díaz Santos, T.; Decarli, R.; Franco, M.; Ivison, R.; Riechers, D.; Rix, H. W.; Weiss, A.
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    The ALMA Spectroscopic Survey in the HUDF : Deep 1.2 mm Continuum Number Counts
    (2020) Gonzalez Lopez, J.; Novak, M.; Decarli, R.; Walter, F.; Aravena, M.; Carilli, C.; Boogaard, L.; Popping, G.; Weiss, A.; Bauer, Franz Erik; Assef, R. J.; Bouwens, R.; Cortes, P. C.; Cox, P.; Daddi, E.; Cunha, E.; Diaz Santos, T.; Ivison, R.; Magnelli, B.; Riechers, D.; Smail, I.; van der Werf, P.; Wagg, J.
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    The ALMA Spectroscopic Survey in the HUDF : Nature and Physical Properties of Gas-mass Selected Galaxies Using MUSE Spectroscopy
    (2019) Boogaard, L.A.; Decarli, R.; González López, Jorge; van der Werf, P.; Walter, F.; Bouwens, R.; Aravena, M.; Carilli, C.; Bauer, Franz Erik; Brinchmann, J.
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    The ALMA Spectroscopic Survey in the HUDF : The Cosmic Dust and Gas Mass Densities in Galaxies up to z ∼ 3
    (2020) Magnelli, B.; Boogaard, L.; Decarli, R.; Gonzalez Lopez, J.; Novak, M.; Popping, G.; Smail, I.; Walter, F.; Aravena, M.; Bauer, Franz Erik; Assef, R. J.; Bertoldi, F.; Carilli, C.; Cortes, P. C.; da Cunha, E.; Daddi, E.; Diaz Santos, T.; Inami, H.; Ivison, R. J.; Le Fevre, O.; Oesch, P.; Riechers, D.; Rix, H. W.; Sargent, M. T.; van der Werf, P.; Wagg, J.; Weiss, A.
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    The ALMA Spectroscopic Survey in the HUDF : the Molecular Gas Content of Galaxies and Tensions with IllustrisTNG and the Santa Cruz SAM
    (2019) Popping, G.; Pillepich, A.; Somerville, R.S.; Decarli, R.; Walter, F.; Aravena, M.; Carilli, C.; Cox, P.; Nelson, D.; González López, Jorge; Riechers, D.
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    The ALMA Spectroscopic Survey in the HUDF: CO Luminosity Functions and the Molecular Gas Content of Galaxies through Cosmic History
    (2019) Decarli, R.; Walter, F.; González López, Jorge; Aravenu, M.; Boogaard, L.; Carilli, C.; Cox, P.; Daddi, E.; Popping, G.; Riechers, D.
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    The ALMA Spectroscopic Survey in the HUDF: Constraining Cumulative CO Emission at 1 less than or similar to z less than or similar to 4 with Power Spectrum Analysis of ASPECS LP Data from 84 to 115 GHz
    (2019) Uzgil, B.; Carilli, C.; Lidz, A.; Walter, F.; Thyagarajan, N.; Decarli, R.; Aravena, M.; Bertoldi, F.; Cortes, P. C.; González López, Jorge
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    The Atacama Large Millimeter/submillimeter Array Spectroscopic Survey in the Hubble Ultra Deep Field: CO Emission Lines and 3 mm Continuum Sources
    (2019) González López, Jorge; Decarli, R.; Pavesi, R.; Walter, F.; Aravena, M.; Carilli, C.; Boogaard, L.; Popping, G.; Weiss, A.; Assef, R.J.
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    The evolution of the Baryons associated with Galaxies averaged over cosmic time and space
    (2020) Walter, F.; Carilli, C.; Neeleman, M.; Decarli, R.; Popping, G.; Somerville, R. S.; Aravena, M.; Bertoldi, F.; Boogaard, L.; Bauer, Franz Erik; Cox, P.; Cunha, E. da; Magnelli, B.; Obreschkow, D.; Riechers, D.; Rix, H. W.; Smail, I.; Weiss, A.; Assef, R. J.; Bouwens, R.; Contini, T.; Cortés, P. C.; Daddi, E.; Díaz Santos, T.; González López, Jorge; Hennawi, J.; Hodge, J. A.; Inami, H.; Ivison, R.; Oesch, P.; Sargent, M.; Werf, P. van der; Wagg, J.; Yung, L. Y. A.