Search Publications
Gas conditions of a star-formation selected sample in the first billion years
Carniani, Stefano; Fujimoto, Seiji; Vallini, Livia +20 more
We present Atacama Large Millimetre/submillimetre Array (ALMA) observations of the [O III] 88 $\mu {\rm m}$ emission of a sample of thirteen galaxies at $z = 6$ to 7.6 selected as [C II]-emitting companion sources of quasars. To disentangle the origins of the luminous Oxygen line in the $z\, \gt\, 6$ Universe, we looked at emission-line galaxies t…
A-SLOTH reveals the nature of the first stars
Glover, Simon C. O.; Klessen, Ralf S.; Hartwig, Tilman +1 more
The first generation of stars (Pop III) are too dim to be observed directly and probably too short-lived to have survived for local observations. Hence, we rely on simulations and indirect observations to constrain the nature of the first stars. In this study, we calibrate the semi-analytical model A-SLOTH (Ancient Stars and Local Observables by T…
The frequency of metal enrichment of cool helium-atmosphere white dwarfs using the DESI early data release
Brooks, D.; Doel, P.; Honscheid, K. +35 more
There is an overwhelming evidence that white dwarfs host planetary systems; revealed by the presence, disruption, and accretion of planetary bodies. A lower limit on the frequency of white dwarfs that host planetary material has been estimated to be ≃ 25-50 per cent; inferred from the ongoing or recent accretion of metals on to both hydrogen-atmos…
Two-dimensional kinematics and dynamical modelling of the 'Jackpot' gravitational lens from deep MUSE observations
Collett, Thomas E.; Smith, Russell J.; Turner, Hannah C.
We present results from the first spatially resolved kinematic and dynamical modelling analysis of the unique SDSSJ0946+1006 ('Jackpot') triple-source lens system, where a single massive foreground $z\, =\, 0.222$ galaxy multiple-images three background sources at different redshifts. Deep integral field unit spectroscopic data were obtained using…
WISDOM Project - XVI. The link between circumnuclear molecular gas reservoirs and active galactic nucleus fuelling
Williams, Thomas G.; Cappellari, Michele; Davis, Timothy A. +8 more
We use high-resolution data from the millimetre-Wave Interferometric Survey of Dark Object Masses (WISDOM) project to investigate the connection between circumnuclear gas reservoirs and nuclear activity in a sample of nearby galaxies. Our sample spans a wide range of nuclear activity types including radio galaxies, Seyfert galaxies, low-luminosity…
Deciphering cometary outbursts: linking gas composition changes to trigger mechanisms
Mall, Urs; De Keyser, Johan; Berthelier, Jean-Jacques +9 more
Dust and gas outbursts are recurrent cometary phenomena, playing a crucial role in shaping the coma. Proposed outburst trigger mechanisms include cliff collapse, pressure pockets, and amorphous-to-crystalline phase transition of water ice; however, the underlying processes remain inadequately understood. In this study, we analyse Rosetta/ROSINA da…
An outburst and FU Ori-type disc of a former low-luminosity protostar
Herczeg, Gregory J.; Jose, Jessy; Johnstone, Doug +5 more
Strong accretion outbursts on to protostars are associated with emission dominated by a viscously heated disc, which is characterized by high luminosities. We report the discovery and characterization of a strong mid-IR (3.4, 4.6 µm) outburst in the embedded protostar SSTgbs J21470601+4739394 (hereafter SSTgbsJ214706). SSTgbsJ214706 has stea…
TESS giants transiting giants V - two hot Jupiters orbiting red giant hosts
Hellier, Coel; Quinn, Samuel N.; Zhou, George +24 more
In this work, we present the discovery and confirmation of two hot Jupiters orbiting red giant stars, TOI-4377 b and TOI-4551 b, observed by Transiting Exoplanet Survey Satellite in the Southern ecliptic hemisphere and later followed-up with radial-velocity (RV) observations. For TOI-4377 b, we report a mass of $0.957^{+0.089}_{-0.087} \ M_\mathrm…
FLASH: Faint Lenses from Associated Selection with Herschel
Serjeant, Stephen; Eales, Stephen; Bakx, Tom J. L. C. +5 more
We report the ALMA Band 7 observations of 86 Herschel sources that likely contain gravitationally lensed galaxies. These sources are selected with relatively faint 500 µm flux densities between 15 and 85 mJy in an effort to characterize the effect of lensing across the entire million-source Herschel catalogue. These lensed candidates were id…
A huge-amplitude white-light superflare on a L0 brown dwarf discovered by GWAC survey
Wang, Jing; Ren, Bin; Liang, En-Wei +21 more
White-light superflares from ultra-cool stars are thought to be resulted from magnetic reconnection, but the magnetic dynamics in a fully convective star is not clear yet. In this paper, we report a stellar superflare detected with the ground wide angle camera (GWAC), along with rapid follow-ups with the F60A, Xinglong 2.16-m, and LCOGT telescopes…