Cambridge – Kavli Institute Pre-Print Publications

ANDES, the high-resolution spectrograph for the ELT: design and performance analysis of the YJH spectrograph

Posted by klaurent July 24, 2026July 27, 2026Cambridge, This Week: Astrophysics

Kavli Affiliate: Roberto Maiolino | Summary:The ArmazoNes high Dispersion Echelle Spectrograph (ANDES) is a powerful second-generation high-resolution spectroscopic instrument for the Extremely Large Telescope (ELT). The UBV, RIZ, and YJH modules comprise fibre-fed spectrographs of the ANDES baseline design and will offer continuous wavelength coverage of 0.35-1.8 $μ$m, with the addition of a K-band channel […]

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Outflows in super-Eddington quasars drive clumpy circumgalactic medium and extended H$α$ nebulae at $z gtrsim 6$

Posted by klaurent July 23, 2026July 27, 2026Cambridge, This Week: Astrophysics

Kavli Affiliate: Debora Sijacki | Summary:The discovery of gargantuan black holes with masses exceeding a billion solar masses at $zgtrsim6$ suggests rapid black hole growth and significant energy input into their host galaxies in the early Universe. With JWST probing previously unseen phases of the interstellar (ISM) and circumgalactic (CGM) medium around $z > 6$ […]

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Ringing of the Reionization: A first direct measurement of the intergalactic pressure smoothing scale at redshift z>4.2 as imprinted onto small-scale peculiar velocities in the Lyman-alpha forest

Posted by klaurent July 22, 2026July 27, 2026Cambridge, This Week: Astrophysics

Kavli Affiliate: Martin Haehnelt | Summary:The epoch of reionization leaves detectable imprints in the thermal history of the Universe. In particular, the fast ionization fronts passing over cold gas in the cosmic web overpressurize the gas, leading to the well-established phenomenon of pressure smoothing due to the hydrodynamic response of the gas. Although the effect […]

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An (in)complete NIRSpec census of Balmer absorption in Type 1 AGN — radiation-driven outflows in little red dots, quasars and variable stars

Posted by klaurent July 21, 2026July 27, 2026Cambridge, This Week: Astrophysics

Kavli Affiliate: Roberto Maiolino | Summary:A notable achievement of the first generation of JWST surveys was the discovery of an abundance of faint high-redshift ($z > 4$) broad-line active galactic nuclei (AGN) in the $L_rm bol < 10^45$~erg~s$^-1$ regime, previously only accessible at $z < 1$. The high prevalence of absorption features in their broad […]

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The Azahar Project: Non-Thermal Physics Drives Star Formation Burstiness and the Evolution of the UV Luminosity Density at Cosmic Dawn

Posted by klaurent July 16, 2026July 27, 2026Cambridge

Kavli Affiliate: Debora Sijacki | Summary:JWST observations, which have pushed the discovery and characterization of galaxies to cosmic dawn, have revealed significant deficiencies in state-of-the-art galaxy formation simulations, motivating the need for novel, physically grounded models. We present the first results from the Azahar suite of ten high-resolution ($sim$20 pc), large-volume zoom-in cosmological simulations, which […]

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The JADES Transient Survey III: Linking Core-Collapse Supernova Rates to Cosmic Star Formation

Posted by klaurent July 13, 2026July 27, 2026Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:We investigate how core-collapse supernova (CCSN) rates trace the star-formation rate densities (SFRDs) over the redshift range $0 le z le 5$. For this we use new high-redshift results from the James Webb Space Telescope Advanced Deep Extragalactic Survey (JADES) Transient Survey (JTS, see the companion paper by DeCoursey et […]

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The JADES Transient Survey II: Volumetric Supernova Rates out to z~5

Posted by klaurent July 13, 2026July 27, 2026Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:The JADES Transient Survey (JTS) identified 83 supernova (SN) candidates in the JADES Deep Field, a $sim$25 arcmin$^2$ region with deep ($sim$30 mag) multi-band, multi-epoch JWST/NIRCam coverage. We use this sample to derive the first volumetric core-collapse (CC) SN and Type Ia (SN Ia) rates in the $z$$sim$2-5 range. Many […]

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The Era of Precision in Computational Models of Gravitational Waves

Posted by klaurent July 7, 2026July 20, 2026Cambridge

Kavli Affiliate: Ulrich Sperhake | Summary:Einstein’s equations of general relativity are one of the most complicated set of equations in all of physics and, for all but idealized physical settings, can only be solved by numerical methods on high-performance computing systems. Generating such solutions is a veritable Odyssey in its own right with adventures across […]

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BlackTHUNDER Reveals a Massive Filament around a Compact AGN at $zsimeq5.23$

Posted by klaurent July 6, 2026July 20, 2026Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:Despite the growing number of compact active galactic nuclei (AGN) at $z>4$ discovered by JWST, their formation and evolution remain poorly understood. This paper investigates the large-scale environment of GN-77652, a compact AGN at $z=5.229$ observed as part of the JWST NIRSpec IFU Large Program BlackTHUNDER and complemented by deep […]

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Globular cluster abundance patterns inherited from giant molecular clouds

Posted by klaurent July 6, 2026July 20, 2026Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:Globular clusters exhibit large star-to-star variations and anticorrelations in their light element abundances that are commonly interpreted in terms of in-cluster self-enrichment, in which ejecta from early-forming cluster stars pollute the gas from which later stars form over millions of years. Yet proposed self-enrichment scenarios suffer from a severe mass-budget […]

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