Dynamical signature of a stellar bulge in a quasar host galaxy at $zsimeq 6$

Kavli Affiliate: Roberto Maiolino | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: We present a dynamical analysis of a quasar-host galaxy at $zsimeq 6$ (SDSS J2310+1855) using a high-resolution ALMA observation of the [CII] emission line. The observed rotation curve is fitted with mass models that consider the gravitational contribution of a […]


Continue.. Dynamical signature of a stellar bulge in a quasar host galaxy at $zsimeq 6$

Strong 21-cm fluctuations and anisotropy due to the line-of-sight effect of radio galaxies at cosmic dawn

Kavli Affiliate: George Efstathiou | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: The reported detection of the global 21-cm signal by the EDGES collaboration is significantly stronger than standard astrophysical predictions. One possible explanation is an early radio excess above the cosmic microwave background. Such a radio background could have been produced […]


Continue.. Strong 21-cm fluctuations and anisotropy due to the line-of-sight effect of radio galaxies at cosmic dawn

The fundamental signature of star formation quenching from AGN feedback: A critical dependence of quiescence on supermassive black hole mass not accretion rate

Kavli Affiliate: Roberto Maiolino | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: We identify the intrinsic dependence of star formation quenching on a variety of galactic and environmental parameters, utilizing a machine learning approach with Random Forest classification. We have previously demonstrated the power of this technique to isolate causality, not mere […]


Continue.. The fundamental signature of star formation quenching from AGN feedback: A critical dependence of quiescence on supermassive black hole mass not accretion rate

Joint analysis constraints on the physics of the first galaxies with low frequency radio astronomy data

Kavli Affiliate: George Efstathiou | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: Observations of the first billion years of cosmic history are currently limited. We demonstrate the synergy between observations of the sky-averaged 21-cm signal from neutral hydrogen and interferometric measurements of the corresponding spatial fluctuations. By jointly analysing data from SARAS3 […]


Continue.. Joint analysis constraints on the physics of the first galaxies with low frequency radio astronomy data

Radio jet-ISM interaction and positive radio-mechanical feedback in Abell 1795

Kavli Affiliate: Roberto Maiolino | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: We present XSHOOTER observations with previous ALMA, MUSE and $HST$ observations to study the nature of radio-jet triggered star formation and the interaction of radio jets with the interstellar medium in the brightest cluster galaxy (BCG) in the Abell 1795 […]


Continue.. Radio jet-ISM interaction and positive radio-mechanical feedback in Abell 1795

Anticipating a New-Physics Signal in Upcoming 21-cm Power Spectrum Observations

Kavli Affiliate: George Efstathiou | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: Dark matter-baryon interactions can cool the baryonic fluid, which has been shown to modify the cosmological 21-cm global signal. We show that in a two-component dark sector with an interacting millicharged component, dark matter-baryon scattering can produce a 21-cm power […]


Continue.. Anticipating a New-Physics Signal in Upcoming 21-cm Power Spectrum Observations

Unequal-mass boson-star binaries: Initial data and merger dynamics

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: We present a generalization of the curative initial data construction derived for equal-mass compact binaries in Refs.[1,2] to arbitrary mass ratios. We demonstrate how these improved initial data avoid substantial spurious artifacts in the collision dynamics of unequal-mass boson-star binaries […]


Continue.. Unequal-mass boson-star binaries: Initial data and merger dynamics

Spectroscopy of four metal-poor galaxies beyond redshift ten

Kavli Affiliate: Roberto Maiolino | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: Finding and characterising the first galaxies that illuminated the early Universe at cosmic dawn is pivotal to understand the physical conditions and the processes that led to the formation of the first stars. In the first few months of operations, […]


Continue.. Spectroscopy of four metal-poor galaxies beyond redshift ten

The Molecular-Gas Main Sequence and Schmidt-Kennicutt relation are fundamental, the Star-Forming Main Sequence is a (useful) byproduct

Kavli Affiliate: Roberto Maiolino | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: We investigate the relationship between the star formation rate (SFR), stellar mass ($M_*$) and molecular gas mass ($M_{H_2}$) for local star-forming galaxies. We further investigate these relationships for high-z (z=1-3) galaxies and for the hosts of a local sample of […]


Continue.. The Molecular-Gas Main Sequence and Schmidt-Kennicutt relation are fundamental, the Star-Forming Main Sequence is a (useful) byproduct

Radiation from Global Topological Strings using Adaptive Mesh Refinement: Massive Modes

Kavli Affiliate: E. P. S. Shellard | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: We implement adaptive mesh refinement (AMR) simulations of global topological strings using the public code, GRChombo. We perform a quantitative investigation of massive radiation from single sinusoidally displaced string configurations, studying a range of string widths defined by […]


Continue.. Radiation from Global Topological Strings using Adaptive Mesh Refinement: Massive Modes