478 citations · 20.2k across the 337 of their papers we have counts for
21 papers · 2 filters
On the Detection of Supermassive Primordial Stars
Marco Surace, Daniel J. Whalen, Tilman Hartwig +6
The collapse of supermassive primordial stars in hot, atomically-cooled halos may have given birth to the first quasars at 15 - 20. Recent numerical simulations of these r…
On the resolution requirements for modelling molecular gas formation in solar neighbourhood conditions
P. R. Joshi, S. Walch, D. Seifried +3
The formation of molecular hydrogen (H) and carbon monoxide (CO) is sensitive to the volume and column density distribution of the turbulent interstellar medium. In this paper,…
Efficacy of early stellar feedback in low gas surface density environments
Rahul Kannan, Federico Marinacci, Christine M. Simpson +2
We present a suite of high resolution radiation hydrodynamic simulations of a small patch () of the inter-stellar medium (ISM) performed with Arepo-RT, with the ai…
Feedback in W49A diagnosed with radio recombination lines and models
M. R. Rugel, D. Rahner, H. Beuther +20
We present images of radio recombination lines (RRLs) at wavelengths around 17 cm from the star-forming region W49A to determine the kinematics of ionized gas in the THOR survey (T…
The Influence of Streaming Velocities on the Formation of the First Stars
Anna T. P. Schauer, Simon C. O. Glover, Ralf S. Klessen +1
How, when and where the first stars formed are fundamental questions regarding the epoch of Cosmic Dawn. A second order effect in the fluid equations was recently found to make a s…
A SOFIA Survey of [CII] in the galaxy M51 I. [CII] as a tracer of Star Formation
Jorge L. Pineda, Christian Fischer, Maria Kapala +12
We present a [CII] 158um map of the entire M51 (including M51b) grand--design spiral galaxy observed with the FIFI-LS instrument on SOFIA. We compare the [CII] emission with the to…
Do Spectroscopic Dense Gas Fractions Track Molecular Cloud Surface Densities?
Molly J. Gallagher, Adam K. Leroy, Frank Bigiel +22
We use ALMA and IRAM 30-m telescope data to investigate the relationship between the spectroscopically-traced dense gas fraction and the cloud-scale (120 pc) molecular gas surface…
WARPFIELD 2.0: Feedback-regulated minimum star formation efficiencies of giant molecular clouds
Daniel Rahner, Eric W. Pellegrini, Simon C. O. Glover +1
Star formation is an inefficient process and in general only a small fraction of the gas in a giant molecular cloud (GMC) is turned into stars. This is partly due to the negative e…
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…
FirstLight III: Rest-frame UV-optical spectral energy distributions of simulated galaxies at cosmic dawn
Daniel Ceverino, Ralf Klessen, Simon Glover
Using the FirstLight database of 300 zoom-in cosmological simulations we provide rest-frame UV-optical spectral energy distributions of galaxies with complex star-formation histori…
Synthetic [CII] emission maps of a simulated molecular cloud in formation
A. Franeck, S. Walch, D. Seifried +10
The C ion is an important coolant of interstellar gas, and so the [CII] fine structure line is frequently observed in the interstellar medium. However, the physical and chemi…
Shape and Spin of Minihaloes: From Large Scales to the Centres
Maik Druschke, Anna T. P. Schauer, Simon C. O. Glover +1
The spin and shape of galaxies at the present day have been well-studied both observationally and theoretically. At high redshifts, however, we have to rely on numerical simulation…
Histogram of oriented gradients: a technique for the study of molecular cloud formation
J. D. Soler, H. Beuther, M. Rugel +22
We introduce the histogram of oriented gradients (HOG), a tool developed for machine vision that we propose as a new metric for the systematic characterization of observations of a…
Tracing the formation of molecular clouds via [CII], [CI] and CO emission
Paul C. Clark, Simon C. O. Glover, Sarah E. Ragan +1
Our understanding of how molecular clouds form in the interstellar medium (ISM) would be greatly helped if we had a reliable observational tracer of the gas flows responsible for f…
Radio continuum emission in the northern Galactic plane: Sources and spectral indices from the THOR survey
Y. Wang, S. Bihr, M. Rugel +15
Radio continuum surveys of the Galactic plane can find and characterize HII regions, supernova remnants (SNRs), planetary nebulae (PNe), and extragalactic sources. A number of surv…
The SILCC project - V. The impact of magnetic fields on the chemistry and the formation of molecular clouds
Philipp Girichidis, Daniel Seifried, Thorsten Naab +5
Magnetic fields are ubiquitously observed in the interstellar medium (ISM) of present-day star-forming galaxies with dynamically relevant energy densities. Using three-dimensional…
A dynamical mechanism for the origin of nuclear rings
Mattia C. Sormani, Emanuele Sobacchi, Francesca Fragkoudi +4
We develop a dynamical theory for the origin of nuclear rings in barred galaxies. In analogy with the standard theory of accretion discs, our theory is based on shear viscous force…
Non-Equilibrium Chemistry and Destruction of CO by X-ray Flares
Jonathan Mackey, Stefanie Walch, Daniel Seifried +3
Sources of X-rays such as active galactic nuclei and X-ray binaries are often variable by orders of magnitude in luminosity over timescales of years. During and after these flares…
OH absorption in the first quadrant of the Milky Way as seen by THOR
M. R. Rugel, H. Beuther, S. Bihr +20
The hydroxyl radical (OH) is present in the diffuse molecular and partially atomic phases of the interstellar medium (ISM), but its abundance relative to hydrogen is not clear. We…
FirstLight II: Star formation rates of primeval galaxies from z=5-15
Daniel Ceverino, Ralf Klessen, Simon Glover
In the FirstLight project, we have used ~300 cosmological, zoom-in simulations to determine the star-formation histories of distinct first galaxies with stellar masses between Ms=1…
Descendants of the first stars: the distinct chemical signature of second generation stars
Tilman Hartwig, Naoki Yoshida, Mattis Magg +9
Extremely metal-poor (EMP) stars in the Milky Way (MW) allow us to infer the properties of their progenitors by comparing their chemical composition to the metal yields of the firs…