Search Publications
A large population of strongly lensed faint submillimetre galaxies in future dark energy surveys inferred from JWST imaging
Conselice, Christopher J.; Ho, Luis C.; Babul, Arif +13 more
Bright galaxies at submillimetre wavelengths from Herschel are now well known to be predominantly strongly gravitationally lensed. The same models that successfully predicted this strongly lensed population also predict about 1 per cent of faint 450 µm-selected galaxies from deep James Clerk Maxwell Telescope (JCMT) surveys will also be stro…
MUSEQuBES: mapping the distribution of neutral hydrogen around low-redshift galaxies
Wisotzki, Lutz; Chen, Hsiao-Wen; Cantalupo, Sebastiano +5 more
We present a detailed study of cool, neutral gas traced by Lyα around 4595 z < 0.5 galaxies using stacks of background quasar spectra. The galaxies are selected from our MUSEQuBES low-z survey along with data from the literature. These galaxies, with a median stellar mass of ${\rm log}_{10}(M_*/\rm {\rm M}_{\odot })$ =10.0, are probed by 184 ba…
KAOSS: turbulent, but disc-like kinematics in dust-obscured star-forming galaxies at z 1.3-2.6
Scott, D.; Smail, Ian; Farrah, D. +13 more
We present spatially resolved kinematics of 27 ALMA-identified dust-obscured star-forming galaxies (DSFGs) at z ~ 1.3-2.6, as traced by Hα emission using VLT/KMOS near-infrared integral field spectroscopy from the 'KMOS-ALMA Observations of Submillimetre Sources' (KAOSS) Large Programme. We derive Hα rotation curves and velocity dispersion profile…
Protoclusters as drivers of stellar mass growth in the early Universe, a case study: Taralay - a massive protocluster at z 4.57
Shen, Lu; Giavalisco, Mauro; Hathi, Nimish +26 more
Simulations predict that the galaxy populations inhabiting protoclusters may contribute considerably to the total amount of stellar mass growth of galaxies in the early universe. In this study, we test these predictions observationally, using the Taralay protocluster (formerly PCl J1001+0220) at z ~ 4.57 in the COSMOS field. With the Charting Clus…
The enigmatic origin of two dormant BH binaries: Gaia BH1 and Gaia BH2
Kotko, I.; Belczynski, K.; Banerjee, S.
The two systems, namely, Gaia BH1 and Gaia BH2, that have been confirmed as dormant (i.e. no X-ray emission detected) black hole (BH) - low-mass star binaries in the latest Gaia mission data release are intriguing in the context of their formation and evolution. Both systems consist of
Properties of the brightest young stellar clumps in extremely lensed galaxies at redshifts 4 to 5
Richard, Johan; Adamo, Angela; Messa, Matteo +2 more
We study the populations of stellar clumps in three high-redshift galaxies, at z = 4.92, 4.88, and 4.03, gravitationally lensed by the foreground galaxy clusters MS1358, RCS0224, and MACS0940, respectively. The lensed galaxies consist of multiple counter-images with large magnifications, mostly above $\mu > 5$ and in some cases reaching $\mu &g…
TESS Cycle 2 observations of roAp stars with 2-min cadence data
Handler, G.; Derekas, A.; Niemczura, E. +47 more
We present the results of a systematic search of the Transiting Exoplanet Survey Satellite (TESS) 2-min cadence data for new rapidly oscillating Ap (roAp) stars observed during the Cycle 2 phase of its mission. We find seven new roAp stars previously unreported as such and present the analysis of a further 25 roAp stars that are already known. Thr…
GHOST commissioning science results - II: a very metal-poor star witnessing the early galactic assembly
Hayes, Christian R.; Sestito, Federico; Jensen, Jaclyn +25 more
This study focuses on Pristine$\_180956.78$-294759.8 (hereafter P180956, [Fe/H] = -1.95 ± 0.02), a star selected from the Pristine Inner Galaxy Survey (PIGS), and followed-up with the recently commissioned Gemini High-resolution Optical SpecTrograph (GHOST) at the Gemini South telescope. The GHOST spectrograph's high efficiency in the blue spectra…
Unveiling energy pathways in AGN accretion flows with the warm corona model for the soft excess
Bianchi, S.; Petrucci, P. -O.; De Marco, B. +9 more
The soft excess in active galactic nuclei (AGNs) may arise through a combination of relativistic reflection and the effects of a warm corona at the surface of the accretion disc. Detailed examination of the soft excess can therefore constrain models of the transport and dissipation of accretion energy. Here, we analyse 34 XMM-Newton observations f…
Extremely strong C IV λ1550 nebular emission in the extremely low-metallicity star-forming galaxy J2229+2725
Schaerer, D.; Thuan, T. X.; Izotov, Y. I. +2 more
Using Hubble Space Telescope/Cosmic Origins Spectrograph observations of one of the most metal-poor dwarf star-forming galaxies (SFGs) in the local Universe, J2229+2725, we have discovered an extremely strong nebular C IV λλ1549, 1551 emission-line doublet, with an equivalent width of 43 Å, several times higher than the value observed so far in lo…