Search Publications
ALMA Lensing Cluster Survey: a strongly lensed multiply imaged dusty system at z ≥ 6
Wang, T.; Laporte, N.; Bauer, F. E. +20 more
We report the discovery of an intrinsically faint, quintuply-imaged, dusty galaxy MACS0600-z6 at a redshift z = 6.07 viewed through the cluster MACSJ0600.1-2008 (z = 0.46). A ≃ 4σ dust detection is seen at 1.2mm as part of the ALMA Lensing Cluster Survey (ALCS), an on-going ALMA Large programme, and the redshift is secured via [C II] 158 µm …
The VMC survey - XLI. Stellar proper motions within the Small Magellanic Cloud
Sun, Ning-Chen; de Grijs, Richard; Ripepi, Vincenzo +13 more
We used data from the near-infrared Visible and Infrared Telescope for Astronomy (VISTA) survey of the Magellanic Cloud system (VMC) to measure proper motions (PMs) of stars within the Small Magellanic Cloud (SMC). The data analysed in this study comprise 26 VMC tiles, covering a total contiguous area on the sky of ∼40 deg2. Using multi…
Exemplary Merging Clusters: Weak-lensing and X-Ray Analysis of the Double Radio Relic, Merging Galaxy Clusters MACS J1752.0+4440 and ZWCL 1856.8+6616
Dawson, William A.; Jones, Christine; Forman, William R. +8 more
The investigation of merging galaxy clusters that exhibit radio relics is strengthening our understanding of the formation and evolution of galaxy clusters, the nature of dark matter, the intracluster medium, and astrophysical particle acceleration. Each merging cluster provides only a single view of the cluster formation process, and the variety …
A Spatially Resolved Survey of Distant Quasar Host Galaxies. I. Dynamics of Galactic Outflows
Armus, Lee; Larkin, James E.; Wright, Shelley A. +6 more
We present observations of ionized gas outflows in 11 z = 1.39-2.59 radio-loud quasar host galaxies. Data were taken with the integral field spectrograph OSIRIS and the adaptive optics system at the W.M. Keck Observatory targeting nebular emission lines (Hβ, [O III], Hα, [N II], and [S II]) redshifted into the near-infrared (1-2.4 µm). Outfl…
Solar Orbiter's first Venus flyby: Observations from the Radio and Plasma Wave instrument
Maksimovic, M.; Bale, S. D.; Chust, T. +41 more
Context. On December 27, 2020, Solar Orbiter completed its first gravity assist manoeuvre of Venus (VGAM1). While this flyby was performed to provide the spacecraft with sufficient velocity to get closer to the Sun and observe its poles from progressively higher inclinations, the Radio and Plasma Wave (RPW) consortium, along with other operational…
Recovery and analysis of rest-frame UV emission lines in 2052 galaxies observed with MUSE at 1.5 < z < 6.4
Feltre, A.; Kollatschny, W.; Mahler, G. +17 more
Rest-frame ultraviolet (UV) emission lines probe electron densities, gas-phase abundances, metallicities, and ionization parameters of the emitting star-forming galaxies and their environments. The strongest main UV emission line, Lyα, has been instrumental in advancing the general knowledge of galaxy formation in the early universe. However, obse…
SUPER. V. ALMA continuum observations of z ∼ 2 AGN and the elusive evidence of outflows influencing star formation
Alexander, D. M.; Fiore, F.; Marconi, A. +24 more
We study the impact of active galactic nuclei (AGN) ionised outflows on star formation in high-redshift AGN host galaxies, by combining near-infrared integral field spectroscopic (IFS) observations, mapping the Hα emission and [O III]λ5007 outflows, with matched-resolution observations of the rest-frame far-infrared (FIR) emission. We present high…
Gaia view of a stellar sub-structure in front of the Small Magellanic Cloud
de Grijs, Richard; Cioni, Maria-Rosa L.; Bekki, Kenji +6 more
Recent observational studies identified a foreground stellar sub-structure traced by red clump (RC) stars (∼12 kpc in front of the main body) in the eastern regions of the Small Magellanic Cloud (SMC) and suggested that it formed during the formation of the Magellanic Bridge (MB), due to the tidal interaction of the Magellanic Clouds. Previous stu…
LAMOST J0140355 + 392651: an evolved cataclysmic variable donor transitioning to become an extremely low-mass white dwarf
Xiang, Maosheng; Rix, Hans-Walter; El-Badry, Kareem +6 more
We present LAMOST J0140355 + 392651 (hereafter J0140), a close (Porb = 3.81 h) binary containing a bloated, low-mass ($M \approx 0.15 \, \mathrm{M}_{\odot }$) proto-white dwarf (WD) and a massive ($M \approx 0.95\, \mathrm{M}_{\odot }$) WD companion. The system's optical light curve is dominated by large-amplitude ellipsoidal variabilit…
Targeting Bright Metal-poor Stars in the Disk and Halo Systems of the Galaxy
Casey, Andrew R.; Beers, Timothy C.; Lee, Young Sun +7 more
We present the results of spectroscopic follow-up for 1897 low-metallicity star candidates, selected from the Best & Brightest (B&B) Survey, carried out with the GMOS-N/S (Gemini North/South telescopes) and Goodman (SOAR Telescope) spectrographs. From these low-resolution (R ∼ 2000) spectra, we estimate stellar atmospheric parameters, as w…