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Hybrid photometric redshifts for sources in the COSMOS and XMM-LSS fields

ArXiv 2206.00748 (2022)

Authors:

PW Hatfield, MJ Jarvis, N Adams, RAA Bowler, B Häußler, KJ Duncan
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The star-formation rates of QSOs

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

Authors:

M Symeonidis, N Maddox, MJ Jarvis, MJ Michałowski, P Andreani, DL Clements, G De Zotti, S Duivenvoorden, J Gonzalez-Nuevo, E Ibar, RJ Ivison, L Leeuw, MJ Page, R Shirley, MWL Smith, M Vaccari

Abstract:

Abstract We examine the far-IR properties of a sample of 5391 optically selected QSOs in the 0.5 < z < 2.65 redshift range down to log [νLν, 2500(erg/s)] > 44.7, using SPIRE data from Herschel-ATLAS. We split the sample in a grid of 74 luminosity-redshift bins and compute the average optical–infrared spectral energy distribution (SED) in each bin. By normalising an intrinsic AGN template to the AGN optical power (at 5100Å) we decompose the total infrared emission (LIR; 8—1000μm) into an AGN (LIR, AGN) and star-forming component (LIR, SF). We find that the AGN contribution to LIR increases as a function of AGN power which manifests as a reduction of the ‘far-IR bump’ in the average QSO SEDs. We note that LIR, SF does not correlate with AGN power; the mean star formation rates (SFRs) of AGN host galaxies are a function of redshift only and they range from ∼6 M⊙/yr at z ∼ 0 to a plateau of ≲ 200 M⊙/yr at z ∼ 2.6. Our results indicate that the accuracy of far-IR emission as a proxy for SFR decreases with increasing AGN luminosity. We show that, at any given redshift, observed trends between infrared luminosity (whether monochromatic or total) and AGN power (in the optical or X-rays) can be explained by a simple model which is the sum of two components: (A) the infrared emission from star-formation, uncorrelated with AGN power and (B) the infrared emission from AGN, directly proportional to AGN power in the optical or X-rays.
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MIGHTEE - H I. The relation between the H I gas in galaxies and the cosmic web

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 513:2 (2022) 2168-2177

Authors:

Madalina N Tudorache, MJ Jarvis, I Heywood, AA Ponomareva, N Maddox, BS Frank, NJ Adams, RAA Bowler, IH Whittam, M Baes, H Pan, SHA Rajohnson, F Sinigaglia, K Spekkens
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Looking at the Distant Universe with the MeerKAT Array: Discovery of a Luminous OH Megamaser at z > 0.5

ASTROPHYSICAL JOURNAL LETTERS 931:1 (2022) ARTN L7

Authors:

Marcin Glowacki, Jordan D Collier, Amir Kazemi-Moridani, Bradley Frank, Hayley Roberts, Jeremy Darling, Hans-Rainer Kloeckner, Nathan Adams, Andrew J Baker, Matthew Bershady, Tariq Blecher, Sarah-Louise Blyth, Rebecca Bowler, Barbara Catinella, Laurent Chemin, Steven M Crawford, Catherine Cress, Romeel Dave, Roger Deane, Erwin de Blok, Jacinta Delhaize, Kenneth Duncan, Ed Elson, Sean February, Eric Gawiser, Peter Hatfield, Julia Healy, Patricia Henning, Kelley M Hess, Ian Heywood, Benne W Holwerda, Munira Hoosain, John P Hughes, Zackary L Hutchens, Matt Jarvis, Sheila Kannappan, Neal Katz, Dusan Keres, Marie Korsaga, Renee C Kraan-Korteweg, Philip Lah, Michelle Lochner, Natasha Maddox, Sphesihle Makhathini, Gerhardt R Meurer, Martin Meyer, Danail Obreschkow, Se-Heon Oh, Tom Oosterloo, Joshua Oppor, Hengxing Pan, DJ Pisano, Nandrianina Randriamiarinarivo, Swara Ravindranath, Anja C Schroeder, Rosalind Skelton, Oleg Smirnov, Mathew Smith, Rachel S Somerville, Raghunathan Srianand, Lister Staveley-Smith, Masayuki Tanaka, Mattia Vaccari, Wim van Driel, Marc Verheijen, Fabian Walter, John F Wu, Martin A Zwaan
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Deep extragalactic visible legacy survey (DEVILS): The emergence of bulges and decline of disk growth since z = 1.

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

Authors:

Abdolhosein Hashemizadeh, Simon P Driver, Luke JM Davies, Aaron SG Robotham, Sabine Bellstedt, Caroline Foster, Benne W Holwerda, Matt Jarvis, Steven Phillipps, Malgorzata Siudek, Jessica E Thorne, Rogier A Windhorst, Christian Wolf

Abstract:

Abstract We present a complete structural analysis of the ellipticals (E), diffuse bulges (dB), compact bulges (cB), and disks (D) within a redshift range 0 < z < 1, and stellar mass log10(M*/M⊙) ≥ 9.5 volume-limited sample drawn from the combined DEVILS and HST-COSMOS region. We use the ProFit code to profile over ∼35, 000 galaxies for which visual classification into single or double-component was predefined in Paper-I. Over this redshift range, we see a growth in the total stellar mass density (SMD) of a factor of 1.5. At all epochs we find that the dominant structure, contributing to the total SMD, is the disk, and holds a fairly constant share of $\sim 60{{\ \rm per\ cent}}$ of the total SMD from z = 0.8 to z = 0.2, dropping to $\sim 30{{\ \rm per\ cent}}$ at z = 0.0 (representing $\sim 33{{\ \rm per\ cent}}$ decline in the total disk SMD). Other classes (E, dB, and cB) show steady growth in their numbers and integrated stellar mass densities. By number, the most dramatic change across the full mass range is in the growth of diffuse bulges. In terms of total SMD, the biggest gain is an increase in massive elliptical systems, rising from 20 per cent at z = 0.8 to equal that of disks at z = 0.0 (30 per cent) representing an absolute mass growth of a factor of 2.5. Overall we see a clear picture of the emergence and growth of all three classes of spheroids over the past 8 Gyrs, and infer that in the later half of the Universe’s timeline spheroid forming-processes and pathways (secular evolution, mass-accretion, and mergers) appear to dominate mass transformation over quiescent disk growth.
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