The irreducible mass and the horizon area of LIGO’s black holes

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Davide Gerosa, Cecilia Maria Fabbri, Ulrich Sperhake, , | Summary: The mass of a Kerr black hole can be separated into irreducible and rotational components -the former is a lower limit to the energy that cannot be possibly extracted from the event horizon and is related to […]


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Emulation of the Cosmic Dawn 21-cm Power Spectrum and Classification of Excess Radio Models Using an Artificial Neural Network

Kavli Affiliate: George Efstathiou | First 5 Authors: Sudipta Sikder, Rennan Barkana, Itamar Reis, Anastasia Fialkov, | Summary: The cosmic 21-cm line of hydrogen is expected to be measured in detail by the next generation of radio telescopes. The enormous dataset from future 21-cm surveys will revolutionize our understanding of early cosmic times. We present […]


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The quenching of galaxies, bulges, and disks since cosmic noon: A machine learning approach for identifying causality in astronomical data

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Asa F. L. Bluck, Roberto Maiolino, Simcha Brownson, Christopher J. Conselice, Sara L. Ellison | Summary: We present an analysis of the quenching of star formation in galaxies, bulges, and disks throughout the bulk of cosmic history, from $z=2-0$. We utilise observations from the SDSS and MaNGA […]


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ALMaQUEST — VII: Star Formation Scaling Relations of Green Valley Galaxies

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Lihwai Lin, Sara L. Ellison, Hsi-An Pan, Mallory Thorp, Po-Chieh Yu | Summary: We utilize the ALMA-MaNGA QUEnch and STar formation (ALMaQUEST) survey to investigate the kpc-scale scaling relations, presented as the resolved star forming main sequence (rSFMS: $Sigma_{rm SFR}$ vs. $Sigma_{*}$), the resolved Schmidt-Kennicutt relation (rSK: […]


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The ALMaQUEST Survey IX: The nature of the resolved star forming main sequence

Kavli Affiliate: Roberto Maiolino | First 5 Authors: William M. Baker, Roberto Maiolino, Asa F. L. Bluck, Lihwai Lin, Sara L. Ellison | Summary: We investigate the nature of the scaling relations between the surface density of star formation rate ($Sigma _{rm SFR}$), stellar mass ($Sigma _*$), and molecular gas mass ($Sigma _{rm H_2}$), aiming […]


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GRChombo: An adaptable numerical relativity code for fundamental physics

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Tomas Andrade, Llibert Areste Salo, Josu C. Aurrekoetxea, Jamie Bamber, Katy Clough | Summary: GRChombo is an open-source code for performing Numerical Relativity time evolutions, built on top of the publicly available Chombo software for the solution of PDEs. Whilst GRChombo uses standard techniques in NR, it […]


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What drives galaxy quenching? A deep connection between galaxy kinematics and quenching in the local Universe

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Simcha Brownson, Asa F. L. Bluck, Roberto Maiolino, Gareth C. Jones, | Summary: We develop a 2D inclined rotating disc model, which we apply to the stellar velocity maps of 1862 galaxies taken from the MaNGA survey (SDSS public Data Release 15). We use a random forest […]


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Lessons for adaptive mesh refinement in numerical relativity

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Miren Radia, Ulrich Sperhake, Amelia Drew, Katy Clough, Pau Figueras | Summary: We demonstrate the flexibility and utility of the Berger-Rigoutsos Adaptive Mesh Refinement (AMR) algorithm used in the open-source numerical relativity code GRChombo for generating gravitational waveforms from binary black-hole inspirals, and for studying other problems […]


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Note on the absence of the second clock effect in Weyl gauge theories of gravity

Kavli Affiliate: Anthony Lasenby | First 5 Authors: Michael Hobson, Anthony Lasenby, , , | Summary: We reconsider the status of the so-called second clock effect in Weyl gauge theories of gravity, which are invariant both under local Poincar’e transformations and local changes of scale. In particular, we revisit and extend our previous demonstration that […]


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