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Jun 26, 2024 | 
iopscience.iop.org | Bingjie Wang |Joel Leja |Anna de Graaff |Max-Planck-Institut für Astronomie
In the cores of the most massive galaxies in the local Universe, stars have inferred stellar age of ∼13 Gyr and high α-element abundance, suggesting that their stellar components are formed at z ≳ 5 in a spectacular and short burst of star formation (e.g., Thomas et al. 2005).
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May 14, 2024 | 
aanda.org | Stefano Carniani |Giacomo Venturi |Eleonora Parlanti |Anna de Graaff
We find evidence for ionised outflows in 25%−40% of the 52 galaxies of the sample, where the incidence rate depends on the S/N. This incidence rate may be caused by the geometry of the outflowing gas. When the outflows have a biconical morphology with an opening angle of ∼45 deg, we expect an incidence rate of ∼30%, which is consistent with our observations.
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Feb 14, 2024 | 
nature.com | Lukas J. Furtak |Ivo Labbe |Adi Zitrin |Anna de Graaff |Rachel Bezanson |Gabriel Brammer | +14 more
AbstractEarly JWST observations have uncovered a new population of red sources that might represent a previously overlooked phase of supermassive black hole growth1−−3. One of the most intriguing examples is an extremely red, point-like object that was found to be triply-imaged by the strong lensing (SL) cluster Abell 27444. Here we present deep JWST/NIRSpec observations of this object, Abell2744-QSO1.
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Jan 17, 2024 | 
nature.com | Roberto Maiolino |Joris Witstok |Stefano Carniani |Anna de Graaff |Hannah Übler |Sandro Tacchella | +20 more
AbstractMultiple theories have been proposed to describe the formation of black hole seeds in the early Universe and to explain the emergence of very massive black holes observed in the first billion years after Big Bang1–3. Models consider different seeding and accretion scenarios4–7, which require the detection and characterisation of black holes in the first few hundred million years after Big Bang to be validated.
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Jan 17, 2024 | nature.com | Roberto Maiolino |Joris Witstok |Stefano Carniani |Anna de Graaff |Hannah Übler |Sandro Tacchella | +20 more
AbstractMultiple theories have been proposed to describe the formation of black hole seeds in the early Universe and to explain the emergence of very massive black holes observed in the first billion years after Big Bang1–3. Models consider different seeding and accretion scenarios4–7, which require the detection and characterisation of black holes in the first few hundred million years after Big Bang to be validated.
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Jan 17, 2024 | nature.com | Roberto Maiolino |Joris Witstok |Stefano Carniani |Anna de Graaff |Hannah Übler |Sandro Tacchella | +20 more
AbstractMultiple theories have been proposed to describe the formation of black hole seeds in the early Universe and to explain the emergence of very massive black holes observed in the first billion years after Big Bang1–3. Models consider different seeding and accretion scenarios4–7, which require the detection and characterisation of black holes in the first few hundred million years after Big Bang to be validated.
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Aug 21, 2023 | 
zenodo.org | Anna de Graaff
Reference data needed for forward modelling of NIRSpec MSA data, as described in de Graaff et al. 2023 (https://arxiv.org/abs/2308.09742). This dataset contains a library of traces for each NIRSpec filter/disperser combination, providing a mapping from a microshutter s_{i,j} and wavelength to the position in the detector plane, and includes the rotation angle of the slitlet with respect to the trace in the detector plane.
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Jul 19, 2023 | 
nature.com | Joris Witstok |Renske Smit |Stefano Carniani |Emma Curtis-Lake |Pierre Ferruit |Santiago Arribas | +21 more
Author notesThese authors contributed equally: Irene Shivaei, Renske SmitAuthors and AffiliationsKavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge, UKJoris Witstok, Roberto Maiolino, Mirko Curti, Francesco D’Eugenio, Tobias J. Looser, William M. Baker, Lester Sandles, Jan Scholtz & Sandro TacchellaCavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge, UKJoris Witstok, Roberto Maiolino, Mirko Curti, Francesco D’Eugenio, Tobias J.
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Jul 19, 2023 | nature.com | Joris Witstok |Renske Smit |Stefano Carniani |Emma Curtis-Lake |Pierre Ferruit |Santiago Arribas | +21 more
Author notesThese authors contributed equally: Irene Shivaei, Renske SmitAuthors and AffiliationsKavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge, UKJoris Witstok, Roberto Maiolino, Mirko Curti, Francesco D’Eugenio, Tobias J. Looser, William M. Baker, Lester Sandles, Jan Scholtz & Sandro TacchellaCavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge, UKJoris Witstok, Roberto Maiolino, Mirko Curti, Francesco D’Eugenio, Tobias J.
