Cambridge – Kavli Institute Pre-Print Publications

Witnessing the onset of Reionisation via Lyman-$α$ emission at redshift 13

Posted by dbos Cambridge, This Week: Astrophysics

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Joris Witstok, Peter Jakobsen, Roberto Maiolino, Jakob M. Helton, Benjamin D. Johnson | Summary: $require{mediawiki-texvc}$Cosmic Reionisation commenced when ultraviolet (UV) radiation produced in the first galaxies began illuminating the cold, neutral gas that filled the primordial Universe. Recent James Webb Space Telescope (JWST) observations have shown that […]

Continue..

Narrow line AGN selection in CEERS: spectroscopic selection, physical properties, X-ray and radio analysis

Posted by dbos August 28, 2024September 3, 2024Cambridge, This Week: Astrophysics

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Giovanni Mazzolari, Jan Scholtz, Roberto Maiolino, Roberto Gilli, Alberto Traina | Summary: In this work, we spectroscopically select narrow-line AGN (NLAGN) among the $sim 300$ publicly available medium-resolution spectra of the CEERS Survey. Using both traditional and newly identified emission line NLAGN diagnostics diagrams, we identified 52 […]

Continue..

From Halos to Galaxies. VI. Improved halo mass estimation for SDSS groups and measurement of the halo mass function

Posted by dbos August 22, 2024Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Dingyi Zhao, Yingjie Peng, Yipeng Jing, Xiaohu Yang, Luis C. Ho | Summary: In $Lambda$CDM cosmology, galaxies form and evolve in their host dark matter (DM) halos. Halo mass is crucial for understanding the halo-galaxy connection. The abundance matching (AM) technique has been widely used to derive […]

Continue..

Evolving Dark Energy or Supernovae Systematics?

Posted by dbos August 13, 2024Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: George Efstathiou, , , , | Summary: Recent results from the Dark Energy Spectroscopic Instrument (DESI) collaboration have been interpreted as evidence for evolving dark energy. However, this interpretation is strongly dependent on which Type Ia supernova (SN) sample is combined with DESI measurements of baryon acoustic […]

Continue..

JWST/NIRSpec WIDE survey: a z=4.6 low-mass star-forming galaxy hosting a jet-driven shock with low ionisation and solar metallicity

Posted by dbos August 7, 2024August 19, 2024Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Francesco D’Eugenio, Roberto Maiolino, Vijay H. Mahatma, Giovanni Mazzolari, Stefano Carniani | Summary: We present NIRSpec/MSA observations from the JWST large-area survey WIDE, targeting the rest-frame UV-optical spectrum of Ulema, a radio-AGN host at redshift z=4.6348. The low-resolution prism spectrum displays high equivalent width nebular emission, with […]

Continue..

JADES Ultra-red Flattened Objects: Morphologies and Spatial Gradients in Color and Stellar Populations

Posted by dbos August 5, 2024August 19, 2024Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Justus L. Gibson, Erica Nelson, Christina C. Williams, Sedona H. Price, Katherine E. Whitaker | Summary: One of the more surprising findings after the first year of JWST observations is the large number of spatially extended galaxies (ultra-red flattened objects, or UFOs) among the optically-faint galaxy population […]

Continue..

GA-NIFS: Multi-phase outflows in a star-forming galaxy at $z sim 5.5$

Posted by dbos July 26, 2024Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Eleonora Parlanti, Stefano Carniani, Giacomo Venturi, Rodrigo Herrera-Camus, Santiago Arribas | Summary: Galactic outflows driven by star formation or active galactic nuclei are typically formed by multi-phase gas whose temperature spans over 4 orders of magnitude. Probing the different outflow components requires multi-wavelength observations and long exposure […]

Continue..

Stirring the cosmic pot: how black hole feedback shapes the matter power spectrum in the Fable simulations

Posted by dbos July 25, 2024August 5, 2024Cambridge

Kavli Affiliate: Debora Sijacki | First 5 Authors: Sergio Martin-Alvarez, Vid Iršič, Sophie Koudmani, Martin Bourne, Leah Bigwood | Summary: Understanding the impact of baryonic physics on cosmic structure formation is crucial for accurate cosmological predictions, especially as we usher in the era of large galaxy surveys with the Rubin Observatory as well as the […]

Continue..

PKS 2131-021 — Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary

Posted by dbos July 12, 2024Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Sebastian Kiehlmann, Philipe Vergara De La Parra, Andrew Sullivan, A. Synani, Ioannis Liodakis | Summary: Haystack and Owens Valley Radio Observatory (OVRO) observations recently revealed strong sinusoidal total flux density variations that maintained coherence between 1975 and 2021 in the blazar PKS 2131-021 ($z=1.283)$. This was interpreted […]

Continue..

JADES — The Rosetta Stone of JWST-discovered AGN: deciphering the intriguing nature of early AGN

Posted by dbos July 11, 2024July 22, 2024Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Ignas Juodžbalis, Xihan Ji, Roberto Maiolino, Francesco D’Eugenio, Jan Scholtz | Summary: JWST has discovered a large population of Active Galactic Nuclei (AGN) at high redshift. Many of these newly discovered AGN have broad permitted lines (typically H$alpha$), but are extremely weak in the X-rays. Here we […]

Continue..