Search Publications
Formation of hub-filament structure triggered by a cloud-cloud collision in the W33 complex
Liu, Hong-Li; Liu, Tie; Li, Shanghuo +6 more
Hub-filament systems are suggested to be the birth cradles of high-mass stars and clusters, but the formation of hub-filament structure is still unclear. Using FUGIN 13CO (1-0), C18O (1-0) and SEDIGISM 13CO (2-1) survey data, we investigate the formation of hub-filament structure in the W33 complex. The W33 complex…
Variability in a low-mass active galactic nucleus: oscillation or eruption?
Young, A. J.; Webbe, Robbie
Following the discovery of a new class of X-ray variability seen in four galaxies, dubbed quasi-periodic eruptions (QPEs), we reconsider the variability seen in the low-mass active galactic nucleus (AGN) 2XMM J123103.2+110648 to ascertain whether it should be considered a QPE host galaxy. We apply the autocorrelation function to two archival XMM-N…
Scrutiny of a very young, metal-poor star-forming Lyα emitter at z ≈ 3.7
Rodighiero, G.; Zanella, A.; Vanzella, E. +9 more
The origin of the Lyman α (Lyα) emission in galaxies is a long-standing issue: despite several processes known to originate this line (e.g. active galactic nucleus, star formation, cold accretion, shock heating), it is difficult to discriminate among these phenomena based on observations. Recent studies have suggested that the comparison of the ul…
Mapping the distribution of OB stars and associations in Auriga
Quintana, Alexis L.; Wright, Nicholas J.; Jeffries, Robin D.
OB associations are important probes of recent star formation and Galactic structure. In this study, we focus on the Auriga constellation, an important region of star formation due to its numerous young stars, star-forming regions, and open clusters. We show using Gaia data that its two previously documented OB associations, Aur OB1 and OB2, are t…
A DZ white dwarf with a 30 MG magnetic field
Hermes, J. J.; Hollands, M. A.; Stopkowicz, S. +3 more
Magnetic white dwarfs with field strengths below 10 MG are easy to recognize since the Zeeman splitting of spectral lines appears proportional to the magnetic field strength. For fields ≳100 MG, however, transition wavelengths become chaotic, requiring quantum-chemical predictions of wavelengths and oscillator strengths with a non-perturbative tre…
Splitting the lentils: Clues to galaxy/black hole coevolution from the discovery of offset relations for non-dusty versus dusty (wet-merger-built) lenticular galaxies in the Mbh-M*,spheroid and Mbh-M*,galaxy diagrams
Graham, Alister W.
This work advances the (galaxy morphology)-dependent (black hole mass, Mbh)-(spheroid/galaxy stellar mass, M*) scaling relations by introducing 'dust bins' for lenticular (S0) galaxies. Doing so has led to the discovery of Mbh-M*,sph and Mbh-M*,gal relations for dusty S0 galaxies - …
The Magellanic Edges Survey - IV. Complex tidal debris in the SMC outskirts
Da Costa, G. S.; Koposov, S. E.; Mackey, A. D. +2 more
We use data from the Magellanic Edges Survey (MagES) in combination with Gaia EDR3 to study the extreme southern outskirts of the Small Magellanic Cloud (SMC), focussing on a field at the eastern end of a long arm-like structure which wraps around the southern periphery of the Large Magellanic Cloud (LMC). Unlike the remainder of this structure, w…
The VLT MUSE NFM view of outflows and externally photoevaporating discs near the orion bar★
Bally, John; Reiter, Megan; Manara, Carlo F. +10 more
We present Very Large Telescope/Multi-Unit Spectroscopic Explorer Narrow Field Mode observations of a pair of disc-bearing young stellar objects towards the Orion Bar: 203-504 and 203-506. Both of these discs are subject to external photoevaporation, where winds are launched from their outer regions due to environmental irradiation. Intriguingly, …
The clumpy structure of ϵ Eridani's debris disc revisited by ALMA
Cruz-Sáenz de Miera, Fernando; Dent, William R. F.; Wyatt, Mark C. +8 more
ϵ Eridani is the closest star to our Sun known to host a debris disc. Prior observations in the (sub-)millimetre regime have potentially detected clumpy structure in the disc and attributed this to interactions with an (as yet) undetected planet. However, the prior observations were unable to distinguish between structure in the disc and backgroun…
Type II-P supernova progenitor star initial masses and SN 2020jfo: direct detection, light-curve properties, nebular spectroscopy, and local environment
Kilpatrick, Charles D.; Izzo, Luca; Bentley, Rory O. +23 more
We present optical, ultraviolet, and infrared data of the type II supernova (SN II) 2020jfo at 14.5 Mpc. This wealth of multiwavelength data allows us to compare different metrics commonly used to estimate progenitor masses of SN II for the same object. Using its early light curve, we infer SN 2020jfo had a progenitor radius of ≈700 R⊙,…