Galaxy formation and evolution

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Gravitationally lensed quasars in Gaia – IV. 150 new lenses, quasar pairs, and projected quasars

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 520:3 (2023) 3305-3328

Authors:

C Lemon, T Anguita, MW Auger-Williams, F Courbin, A Galan, R McMahon, F Neira, M Oguri, P Schechter, A Shajib, T Treu, A Agnello, C Spiniello

JADES Imaging of GN-z11: Revealing the Morphology and Environment of a Luminous Galaxy 430 Myr After the Big Bang

(2023)

Authors:

Sandro Tacchella, Daniel J Eisenstein, Kevin Hainline, Benjamin D Johnson, William M Baker, Jakob M Helton, Brant Robertson, Katherine A Suess, Zuyi Chen, Erica Nelson, Dávid Puskás, Fengwu Sun, Stacey Alberts, Eiichi Egami, Ryan Hausen, George Rieke, Marcia Rieke, Irene Shivaei, Christina C Williams, Christopher NA Willmer, Andrew Bunker, Alex J Cameron, Stefano Carniani, Stephane Charlot, Mirko Curti, Emma Curtis-Lake, Tobias J Looser, Roberto Maiolino, Michael V Maseda, Tim Rawle, Hans-Walter Rix, Renske Smit, Hannah Übler, Chris Willott, Joris Witstok, Stefi Baum, Rachana Bhatawdekar, Kristan Boyett, A Lola Danhaive, Anna de Graaff, Ryan Endsley, Zhiyuan Ji, Jianwei Lyu, Lester Sandles, Aayush Saxena, Jan Scholtz, Michael W Topping, Lily Whitler

JADES NIRSpec Spectroscopy of GN-z11: Lyman-$\alpha$ emission and possible enhanced nitrogen abundance in a $z=10.60$ luminous galaxy

(2023)

Authors:

Andrew J Bunker, Aayush Saxena, Alex J Cameron, Chris J Willott, Emma Curtis-Lake, Peter Jakobsen, Stefano Carniani, Renske Smit, Roberto Maiolino, Joris Witstok, Mirko Curti, Francesco D'Eugenio, Gareth C Jones, Pierre Ferruit, Santiago Arribas, Stephane Charlot, Jacopo Chevallard, Giovanna Giardino, Anna de Graaff, Tobias J Looser, Nora Luetzgendorf, Michael V Maseda, Tim Rawle, Hans-Walter Rix, Bruno Rodriguez Del Pino, Stacey Alberts, Eiichi Egami, Daniel J Eisenstein, Ryan Endsley, Kevin Hainline, Ryan Hausen, Benjamin D Johnson, George Rieke, Marcia Rieke, Brant E Robertson, Irene Shivaei, Daniel P Stark, Fengwu Sun, Sandro Tacchella, Mengtao Tang, Christina C Williams, Christopher NA Willmer, William M Baker, Stefi Baum, Rachana Bhatawdekar, Rebecca Bowler, Kristan Boyett, Zuyi Chen, Chiara Circosta, Jakob M Helton, Zhiyuan Ji, Jianwei Lyu, Erica Nelson, Eleonora Parlanti, Michele Perna, Lester Sandles, Jan Scholtz, Katherine A Suess, Michael W Topping, Hannah Uebler, Imaan EB Wallace, Lily Whitler

GA-NIFS: A massive black hole in a low-metallicity AGN at $z\sim5.55$ revealed by JWST/NIRSpec IFS

(2023)

Authors:

Hannah Übler, Roberto Maiolino, Emma Curtis-Lake, Pablo G Pérez-González, Mirko Curti, Michele Perna, Santiago Arribas, Stéphane Charlot, Madeline A Marshall, Francesco D'Eugenio, Jan Scholtz, Andrew Bunker, Stefano Carniani, Pierre Ferruit, Peter Jakobsen, Hans-Walter Rix, Bruno Rodríguez Del Pino, Chris J Willott, Torsten Böker, Giovanni Cresci, Gareth C Jones, Nimisha Kumari, Tim Rawle

INSPIRE: INvestigating Stellar Population In RElics

Astronomy & Astrophysics EDP Sciences 672 (2023) A17-A17

Authors:

G D’Ago, C Spiniello, L Coccato, C Tortora, F La Barbera, M Arnaboldi, D Bevacqua, A Ferré-Mateu, A Gallazzi, J Hartke, LK Hunt, I Martín-Navarro, NR Napolitano, C Pulsoni, M Radovich, P Saracco, D Scognamiglio, S Zibetti

Abstract:

Context. The project called INvestigating Stellar Population In RElics (INSPIRE) is based on VLT/X-shooter data from the homonymous on-going ESO Large Program. It targets 52 ultra-compact massive galaxies at 0.1 < z < 0.5 with the goal of constraining their kinematics and stellar population properties in great detail and of analysing their relic nature. Aims. This is the second INSPIRE data release (DR2), comprising 21 new systems with observations completed before March 2022. For each system, we release four one-dimensional (1D) spectra to the ESO Science Archive, one spectrum for each arm of the X-Shooter spectrograph. They are at their original resolution. We also release a combined and smoothed spectrum with a full width at half maximum resolution of 2.51 Å. In this paper, we focus on the line-of-sight velocity distribution, measuring integrated stellar velocity dispersions from the spectra, and assessing their robustness and the associated uncertainties. Methods. For each of the 21 new systems, we systematically investigated the effect of the parameters and set-ups of the full spectral fitting on the stellar velocity dispersion (σ) measurements. In particular, we tested how σ changes when several parameters of the fit as well as the resolution and spectral coverage of the input spectra are varied. Results. We found that the effect that causes the largest systematic uncertainties on σ is the wavelength range used for the fit, especially for spectra with a lower signal-to-noise ratio (S/N ≤ 30). When using blue wavelengths (UVB arm) one generally underestimates the velocity dispersion (by ~15 km s−1). The values obtained from the near-IR (NIR) arm present a larger scatter because the quality of the spectra is lower. We finally compared our results with those in literature, finding a very good agreement overall. Conclusions. Joining results obtained in DR1 with those presented here, INSPIRE contains 40 ultra-compact massive galaxies, corresponding to 75% of the whole survey. By plotting these systems in a stellar mass-velocity dispersion diagram, we identify at least four highly reliable relic candidates among the new systems. Their velocity dispersion is larger than that of normal-sized galaxies of similar stellar mass.