Showing 2018 · astro-ph.GAShow all

26 papers · 2 filters

astro-ph.GA2018★ 13 cited

The infrared-luminous progenitors of high-z quasars

Michele Ginolfi, Raffaella Schneider, Rosa Valiante +4

Here we explore the infrared (IR) properties of the progenitors of high-z quasar host galaxies. Adopting the cosmological, data constrained semi-analytic model GAMETE/QSOdust, we s…

astro-ph.GA2018★ 144 cited

The MAGNUM survey: different gas properties in the outflowing and disk components in nearby active galaxies with MUSE

M. Mingozzi, G. Cresci, G. Venturi +17

We investigated the interstellar medium properties of the disc and outflowing gas in the central regions of nine nearby Seyfert galaxies, all characterised by prominent outflows. T…

astro-ph.GA2018★ 13 cited

The interstellar medium of dwarf galaxies: new insights from Machine Learning analysis of emission line spectra

Graziano Ucci, Andrea Ferrara, Simona Gallerani +6

Dwarf galaxies are ideal laboratories to study the physics of the interstellar medium (ISM). Emission lines have been widely used to this aim. Retrieving the full information encod…

astro-ph.GA2018★ 69 cited

Interstellar dimethyl ether gas-phase formation: a quantum chemistry and kinetics study

Dimitrios Skouteris, Nadia Balucani, Cecilia Ceccarelli +4

Dimethyl ether is one of the most abundant interstellar complex organic molecules. Yet its formation route remains elusive. In this work, we have performed electronic structure and…

astro-ph.GA2018★ 6 cited

UV background fluctuations traced by metal ions at

L. Graziani, A. Maselli, U. Maio

Here we investigate how LyC-opaque systems present in the intergalactic medium at can distort the spectral shape of a uniform UV background (UVB) through radiative tran…

astro-ph.GA2018★ 2 cited

Science with an ngVLA: [CII] 158m Emission from Galaxies

C. L. Carilli, E. J. Murphy, A. Ferrara +1

We consider the capabilities of ALMA and the ngVLA to detect and image the[CII] 158\,m line from galaxies into the cosmic `dark ages' ( to 20). The [CII] line may pro…

astro-ph.GA2018★ 193 cited

Titans of the Early Universe: The Prato Statement on the Origin of the First Supermassive Black Holes

Tyrone E. Woods, Bhaskar Agarwal, Volker Bromm +30

In recent years, the discovery of massive quasars at z~7 has provided a striking challenge to our understanding of the origin and growth of supermassive black holes in the early Un…

astro-ph.GA2018★ 30 cited

Barred galaxies in cosmological zoom-in simulations: the importance of feedback

Tommaso Zana, Pedro R. Capelo, Massimo Dotti +5

Bars are a key factor in the long-term evolution of spiral galaxies, in their unique role in redistributing angular momentum and transporting gas and stars on large scales. The Eri…

astro-ph.GA2018★ 120 cited

Gaia DR2 unravels incompleteness of nearby cluster population: New open clusters in the direction of Perseus

T. Cantat-Gaudin, A. Krone-Martins, N. Sedaghat +13

Open clusters (OCs) are popular tracers of the structure and evolutionary history of the Galactic disk. The OC population is often considered to be complete within 1.8 kpc of the S…

astro-ph.GA2018★ 18 cited

Probing the High-Redshift Universe with SPICA: Toward the Epoch of Reionization and Beyond

E. Egami, S. Gallerani, R. Schneider +36

With the recent discovery of a dozen dusty star-forming galaxies and around 30 quasars at z>5 that are hyper-luminous in the infrared ( L, where $μ…

astro-ph.GA2018★ 55 cited

Production of atomic hydrogen by cosmic rays in dark clouds

Marco Padovani, Daniele Galli, Alexei V. Ivlev +2

The presence of small amounts of atomic hydrogen, detected as absorption dips in the 21 cm line spectrum, is a well-known characteristic of dark clouds. The abundance of hydrogen a…

astro-ph.GA2018★ 25 cited

Radiative transfer of ionizing radiation through gas and dust: stellar source case

Martin Glatzle, Benedetta Ciardi, Luca Graziani

We present a new dust extension to the Monte Carlo radiative transfer code crash, which enables it to simulate the propagation of ionizing radiation through mixtures of gas and dus…

astro-ph.GA2018★ 260 cited

Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal

Jaehong Park, Andrei Mesinger, Bradley Greig +1

The properties of the first galaxies, expected to drive the Cosmic Dawn (CD) and the Epoch of Reionization (EoR), are encoded in the 3D structure of the cosmic 21-cm signal. Parame…

astro-ph.GA2018★ 16 cited

Hunting for Metals Using XQ-100 Legacy Survey Composite Spectra

S. Perrotta, V. D'Odorico, F. Hamann +10

We investigate the NV absorption signal along the line of sight of background quasars, in order to test the robustness of the use of this ion as criterion to select intrinsic (i.e.…

astro-ph.GA2018★ 5 cited

Dark-ages Reionization and Galaxy Formation Simulation - XV. Stellar evolution and feedback in dwarf galaxies at high redshift

Yuxiang Qin, Alan R. Duffy, Simon J. Mutch +3

We directly compare predictions of dwarf galaxy properties in a semi-analytic model (SAM) with those extracted from a high-resolution hydrodynamic simulation. We focus on galaxies…

astro-ph.GA2018★ 54 cited

Witnessing galaxy assembly at the edge of the reionization epoch

V. D'Odorico, C. Feruglio, A. Ferrara +8

We report the discovery of Serenity-18, a galaxy at z=5.939 for which we could measure the content of molecular gas, M(H_2)~ 5 x10^9 M_sun, traced by the CO(6-5) emission, together…

astro-ph.GA2018★ 57 cited

Spectroscopic investigation of a reionized galaxy overdensity at z=7

M. Castellano, L. Pentericci, E. Vanzella +17

We present deep spectroscopic follow-up observations of the Bremer Deep Field (BDF) where the two 7 bright Ly emitters (LAE) BDF521 and BDF3299 were previously discovered…

astro-ph.GA2018★ 5 cited

Growth problems of stellar black holes in early galaxies

Maria Carmela Orofino, Andrea Ferrara, Simona Gallerani

The nature of the seeds of the observed high-z super-massive black holes (SMBH) is unknown. Although different options have been proposed, involving e.g. intermediate mass direct c…

astro-ph.GA2018★ 15 cited

The rest-frame UV-to-optical spectroscopy of APM 08279+5255 - BAL classification and black hole mass estimates

F. G. Saturni, M. Bischetti, E. Piconcelli +9

We present the analysis of the rest-frame optical-to-UV spectrum of APM 08279+5255, a well-known lensed broad absorption line (BAL) quasar at . The spectroscopic data ar…

astro-ph.GA2018★ 65 cited

The Swift/BAT AGN Spectroscopic Survey -- IX. The Clustering Environments of an Unbiased Sample of Local AGN

M. C. Powell, N. Cappelluti, C. M. Urry +9

We characterize the environments of local accreting supermassive black holes by measuring the clustering of AGN in the Swift/BAT Spectroscopic Survey (BASS). With 548 AGN in the re…

astro-ph.GA2018★ 49 cited

The dense molecular gas in the QSO SDSS J231038.88+185519.7 resolved by ALMA

C. Feruglio, F. Fiore, S. Carniani +13

We present ALMA observations of the CO(6-5) and [CII] emission lines and the sub-millimeter continuum of the quasi-stellar object (QSO) SDSS J231038.88+185519.7. Compared…

astro-ph.GA2018★ 22 cited

GAME: GAlaxy Machine learning for Emission lines

Graziano Ucci, Andrea Ferrara, Andrea Pallottini +1

We present an updated, optimized version of GAME (GAlaxy Machine learning for Emission lines), a code designed to infer key interstellar medium physical properties from emission li…

astro-ph.GA2018★ 131 cited

Dusty galaxies in the Epoch of Reionization: simulations

C. Behrens, A. Pallottini, A. Ferrara +2

The recent discovery of dusty galaxies well into the Epoch of Reionization (redshift ) poses challenging questions about the properties of the interstellar medium in these pri…

astro-ph.GA2018★ 38 cited

The 500 ks Chandra observation of the z = 6.31 QSO SDSS J1030+0524

R. Nanni, R. Gilli, C. Vignali +23

We present the results from a ks Chandra observation of the QSO SDSS J1030+0524. This is the deepest X-ray observation to date of a QSO. The QSO is dete…