Cosmology

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Population statistics of intermediate mass black holes in dwarf galaxies using the NewHorizon simulation

(2022)

Authors:

Rs Beckmann, Y Dubois, M Volonteri, Ca Dong-Páez, M Trebitsch, J Devriendt, S Kaviraj, T Kimm, S Peirani

Exhaustive Symbolic Regression

(2022)

Authors:

Deaglan J Bartlett, Harry Desmond, Pedro G Ferreira

The Dark Energy Survey supernova program: cosmological biases from supernova photometric classification

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 518:1 (2022) 1106-1127

Authors:

M Vincenzi, M Sullivan, A Möller, P Armstrong, BA Bassett, D Brout, D Carollo, A Carr, TM Davis, C Frohmaier, L Galbany, K Glazebrook, O Graur, L Kelsey, R Kessler, E Kovacs, GF Lewis, C Lidman, U Malik, RC Nichol, B Popovic, M Sako, D Scolnic, M Smith, G Taylor, BE Tucker, P Wiseman, M Aguena, S Allam, J Annis, J Asorey, D Bacon, E Bertin, D Brooks, DL Burke, A Carnero Rosell, J Carretero, FJ Castander, M Costanzi, LN da Costa, MES Pereira, J De Vicente, S Desai, HT Diehl, P Doel, S Everett, I Ferrero, B Flaugher, P Fosalba, J Frieman, J García-Bellido, DW Gerdes, D Gruen, G Gutierrez, SR Hinton, DL Hollowood, K Honscheid, DJ James, K Kuehn, N Kuropatkin, O Lahav, TS Li, M Lima, MAG Maia, JL Marshall, R Miquel, R Morgan, RLC Ogando, A Palmese, F Paz-Chinchón, A Pieres, AA Plazas Malagón, K Reil, A Roodman, E Sanchez, M Schubnell, S Serrano, I Sevilla-Noarbe, E Suchyta, G Tarle, C To, TN Varga, J Weller, RD Wilkinson

MIGHTEE: deep 1.4 GHz source counts and the sky temperature contribution of star forming galaxies and active galactic nuclei

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (2022)

Authors:

CL Hale, IH Whittam, MJ Jarvis, PN Best, NL Thomas, I Heywood, M Prescott, N Adams, J Afonso, Fangxia An, RAA Bowler, JD Collier, RHW Cook, R Davé, BS Frank, M Glowacki, PW Hatfield, S Kolwa, CC Lovell, N Maddox, L Marchetti, LK Morabito, E Murphy, I Prandoni, Z Randriamanakoto, AR Taylor

Abstract:

Abstract We present deep 1.4 GHz source counts from ∼5 deg2 of the continuum Early Science data release of the MeerKAT International Gigahertz Tiered Extragalactic Exploration (MIGHTEE) survey down to S1.4GHz ∼15 μJy. Using observations over two extragalactic fields (COSMOS and XMM-LSS), we provide a comprehensive investigation into correcting the incompleteness of the raw source counts within the survey to understand the true underlying source count population. We use a variety of simulations that account for: errors in source detection and characterisation, clustering, and variations in the assumed source model used to simulate sources within the field and characterise source count incompleteness. We present these deep source count distributions and use them to investigate the contribution of extragalactic sources to the sky background temperature at 1.4 GHz using a relatively large sky area. We then use the wealth of ancillary data covering a subset of the COSMOS field to investigate the specific contributions from both active galactic nuclei (AGN) and star forming galaxies (SFGs) to the source counts and sky background temperature. We find, similar to previous deep studies, that we are unable to reconcile the sky temperature observed by the ARCADE 2 experiment. We show that AGN provide the majority contribution to the sky temperature contribution from radio sources, but the relative contribution of SFGs rises sharply below 1 mJy, reaching an approximate 15-25 per cent contribution to the total sky background temperature (Tb ∼100 mK) at ∼15 μJy.

First insights into the ISM at z > 8 with JWST: possible physical implications of a high [O iii] λ4363/[O iii] λ5007

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 518:1 (2022) 592-603

Authors:

Harley Katz, Aayush Saxena, Alex J Cameron, Stefano Carniani, Andrew J Bunker, Santiago Arribas, Rachana Bhatawdekar, Rebecca AA Bowler, Kristan NK Boyett, Giovanni Cresci, Emma Curtis-Lake, Francesco D’Eugenio, Nimisha Kumari, Tobias J Looser, Roberto Maiolino, Hannah Übler, Chris Willott, Joris Witstok