Search Results - "Schneider, Raffaella"

Transition of the initial mass function in the metal-poor environments by Chon, Sunmyon, Omukai, Kazuyuki, Schneider, Raffaella

“…ABSTRACT We study star cluster formation in a low-metallicity environment using three-dimensional hydrodynamic simulations. Starting from a turbulent cloud…”
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Impact of the cosmic background radiation on the initial mass function of metal-poor stars by Chon, Sunmyon, Ono, Haruka, Omukai, Kazuyuki, Schneider, Raffaella

“…ABSTRACT We study star cluster formation at low metallicities of Z/Z⊙ = 10−4–10−1 using three-dimensional hydrodynamics simulations. Particular emphasis is put…”
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From the first stars to the first black holes by Valiante, Rosa, Schneider, Raffaella, Volonteri, Marta, Omukai, Kazuyuki

“…The growth of the first supermassive black holes (SMBHs) at z > 6 is still a major challenge for theoretical models. If it starts from black hole (BH) remnants…”
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Dust formation and survival in supernova ejecta by Bianchi, Simone, Schneider, Raffaella

“…The presence of dust at high redshift requires efficient condensation of grains in supernova (SN) ejecta, in accordance with current theoretical models. Yet…”
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The low-end of the black hole mass function at cosmic dawn by Trinca, Alessandro, Schneider, Raffaella, Valiante, Rosa, Graziani, Luca, Zappacosta, Luca, Shankar, Francesco

“…ABSTRACT Understanding the formation and growth of supermassive black holes (SMBHs) at high redshift represents a major challenge for theoretical models. In…”
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The origin of the dust in high-redshift quasars: the case of SDSS J1148+5251 by Valiante, Rosa, Schneider, Raffaella, Salvadori, Stefania, Bianchi, Simone

“…We present a semi-analytical model for the formation and evolution of a high-redshift quasar (QSO). We reconstruct a set of hierarchical merger histories of a…”
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Decoding the stellar fossils of the dusty Milky Way progenitors by de Bennassuti, Matteo, Schneider, Raffaella, Valiante, Rosa, Salvadori, Stefania

“…We investigate the metallicity distribution function (MDF) in the Galactic halo and the relative fraction of carbon-normal and carbon-rich stars. To this aim,…”
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The dust content of the most metal-poor star-forming galaxies by Schneider, Raffaella, Hunt, Leslie, Valiante, Rosa

“…Although dust content is usually assumed to depend uniquely on metallicity, recent observations of two extremely metal-poor dwarf galaxies have suggested that…”
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The first low-mass stars: critical metallicity or dust-to-gas ratio? by Schneider, Raffaella, Omukai, Kazuyuki, Bianchi, Simone, Valiante, Rosa

“…We explore the minimal conditions which enable the formation of metal-enriched solar and subsolar-mass stars. Using a one-zone semi-analytical model, we…”
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Light, medium-weight, or heavy? The nature of the first supermassive black hole seeds by Sassano, Federica, Schneider, Raffaella, Valiante, Rosa, Inayoshi, Kohei, Chon, Sunmyon, Omukai, Kazuyuki, Mayer, Lucio, Capelo, Pedro R

“…ABSTRACT Observations of hyper-luminous quasars at z>6 reveal the rapid growth of supermassive black holes (SMBHs ${\gt}10^9 \,\rm M_{\odot }$) whose origin is…”
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Chasing the observational signatures of seed black holes at z > 7: candidate statistics by Valiante, Rosa, Schneider, Raffaella, Graziani, Luca, Zappacosta, Luca

“…Abstract Supermassive black holes (SMBHs) of 109–1010 M⊙ were already in place ∼13 Gyr ago, at z > 6. Super-Eddington growth of low-mass BH seeds (∼100 M⊙) or…”
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The dust mass in z > 6 normal star-forming galaxies by Mancini, Mattia, Schneider, Raffaella, Graziani, Luca, Valiante, Rosa, Dayal, Pratika, Maio, Umberto, Ciardi, Benedetta, Hunt, Leslie K.

“…We interpret recent ALMA observations of z > 6 normal star-forming galaxies by means of a seminumerical method, which couples the output of a cosmological…”
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Chasing the observational signatures of seed black holes at z > 7: candidate observability by Valiante, Rosa, Schneider, Raffaella, Zappacosta, Luca, Graziani, Luca, Pezzulli, Edwige, Volonteri, Marta

“…Abstract Observing the light emitted by the first accreting black holes (BHs) would dramatically improve our understanding of the formation of quasars at…”
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On the Stellar Populations of Galaxies at z = 9–11: The Growth of Metals and Stellar Mass at Early Times by Tacchella, Sandro, Finkelstein, Steven L., Bagley, Micaela, Dickinson, Mark, Ferguson, Henry C., Giavalisco, Mauro, Graziani, Luca, Grogin, Norman A., Hathi, Nimish, Hutchison, Taylor A., Jung, Intae, Koekemoer, Anton M., Larson, Rebecca L., Papovich, Casey, Pirzkal, Norbert, Rojas-Ruiz, Sofía, Song, Mimi, Schneider, Raffaella, Somerville, Rachel S., Wilkins, Stephen M., Yung, L. Y. Aaron

“…We present a detailed stellar population analysis of 11 bright (H < 26.6) galaxies at z=9−11 (three spectroscopically confirmed) to constrain the chemical…”
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A hint on the metal-free star formation rate density from 21-cm-EDGES data by Chatterjee, Atrideb, Dayal, Pratika, Choudhury, Tirthankar Roy, Schneider, Raffaella

“…ABSTRACT We aim to provide here the first data-constrained estimate of the metal-free (Population III; Pop III) star formation rate density $\dot{\rho…”
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Metals, dust and the cosmic microwave background: fragmentation of high-redshift star-forming clouds by Schneider, Raffaella, Omukai, Kazuyuki

“…We investigate the effects of the cosmic microwave background (CMB) radiation field on the collapse of pre-stellar clouds. Using a semi-analytic model to…”
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Super-critical accretion of medium-weight seed black holes in gaseous proto-galactic nuclei by Sassano, Federica, Capelo, Pedro R, Mayer, Lucio, Schneider, Raffaella, Valiante, Rosa

“…ABSTRACT Accretion at sustained or episodic super-Eddington (SE) rates has been proposed as a pathway to grow efficiently light seeds produced by Pop-III…”
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The ALMA REBELS Survey: specific star formation rates in the reionization era by Topping, Michael W, Stark, Daniel P, Endsley, Ryan, Bouwens, Rychard J, Schouws, Sander, Smit, Renske, Stefanon, Mauro, Inami, Hanae, Bowler, Rebecca A A, Oesch, Pascal, Gonzalez, Valentino, Dayal, Pratika, da Cunha, Elisabete, Algera, Hiddo, van der Werf, Paul, Pallottini, Andrea, Barrufet, Laia, Schneider, Raffaella, De Looze, Ilse, Sommovigo, Laura, Whitler, Lily, Graziani, Luca, Fudamoto, Yoshinobu, Ferrara, Andrea

“…ABSTRACT We present specific star formation rates (sSFRs) for 40 ultraviolet (UV)-bright galaxies at z ∼ 7–8 observed as part of the Reionization Era Bright…”
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The ALMA REBELS survey: the dust-obscured cosmic star formation rate density at redshift 7 by Algera, Hiddo S B, Inami, Hanae, Oesch, Pascal A, Sommovigo, Laura, Bouwens, Rychard J, Topping, Michael W, Schouws, Sander, Stefanon, Mauro, Stark, Daniel P, Aravena, Manuel, Barrufet, Laia, da Cunha, Elisabete, Dayal, Pratika, Endsley, Ryan, Ferrara, Andrea, Fudamoto, Yoshinobu, Gonzalez, Valentino, Graziani, Luca, Hodge, Jacqueline A, Hygate, Alexander P S, de Looze, Ilse, Nanayakkara, Themiya, Schneider, Raffaella, van der Werf, Paul P

“…ABSTRACT Cosmic dust is an essential component shaping both the evolution of galaxies and their observational signatures. How quickly dust builds up in the…”
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The formation and coalescence sites of the first gravitational wave events by Schneider, Raffaella, Graziani, Luca, Marassi, Stefania, Spera, Mario, Mapelli, Michela, Alparone, Matteo, Bennassuti, Matteo de

“…Abstract We present a novel theoretical model to characterize the formation and coalescence sites of compact binaries in a cosmological context. This is based…”
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