Search Publications
The disrupting and growing open cluster spiral arm patterns of the Milky Way
Luo, Yangping; Wang, Kun; Liu, Xiaochen +1 more
Star clusters provide unique advantages for investigating Galactic spiral arms, particularly due to their precise ages, positions, and kinematic properties, which are further enhanced by ongoing updates from the astrometric data. In this study, we employ the latest extensive catalogue of open clusters from Gaia DR3 to examine the positional deviat…
The VMC Survey - LI. Classifying extragalactic sources using a probabilistic random forest supervised machine learning algorithm
Maitra, Chandreyee; Aird, James; de Grijs, Richard +10 more
We used a supervised machine learning algorithm (probabilistic random forest) to classify
Simultaneous optical and X-ray detection of a thermonuclear burst in the 2024 outburst of EXO 0748-676
Ingram, Adam; Roberts, Timothy P.; Middleton, Matthew +5 more
The neutron star low-mass X-ray binary, EXO 0748-676, recently returned to outburst after a
A coronal mass ejection encountered by four spacecraft within 1 au from the Sun: ensemble modelling of propagation and magnetic structure
Al-Haddad, Nada; Riley, Pete; Richter, Ingo +11 more
Understanding and predicting the structure and evolution of coronal mass ejections (CMEs) in the heliosphere remains one of the most sought-after goals in heliophysics and space weather research. A powerful tool for improving current knowledge and capabilities consists of multispacecraft observations of the same event, which take place when two or…
NGTS-33b: a young super-Jupiter hosted by a fast-rotating massive hot star
Ramsay, Gavin; Wheatley, Peter J.; Moyano, Maximiliano +22 more
In the last few decades, planet search surveys have been focusing on solar-type stars, and only recently the high-mass regimes. This is mostly due to challenges arising from the lack of instrumental precision, and more importantly, the inherent active nature of fast-rotating massive stars. Here, we report NGTS-33b (TOI-6442b), a super-Jupiter plan…
NGTS-EB-7, an eccentric, long-period, low-mass eclipsing binary
Trifonov, Trifon; Henning, Thomas; de Mooij, Ernst J. W. +35 more
Despite being the most common types of stars in the Galaxy, the physical properties of late M dwarfs are often poorly constrained. A trend of radius inflation compared to evolutionary models has been observed for earlier type M dwarfs in eclipsing binaries, possibly caused by magnetic activity. It is currently unclear whether this trend also exten…
Reflection-dominated Compton-thick AGN candidates in the SRG/eROSITA Lockman Hole survey
Gilfanov, M. R.; Medvedev, P. S.; Sunyaev, R. A. +2 more
We search for reflection-dominated Compton-thick active galactic nuclei (CT AGN) candidates in the Lockman Hole (LH) region using the data of SRG/eROSITA LH survey. We selected sources with anomalously hard photon indices in the 0.3-8.0 keV band, untypical for Type I AGN. In particular, we required that the upper end of the 90 per cent error inter…
A comprehensive study of the dust declines in R Coronae Borealis stars
Bedding, Timothy R.; Lee, Chung-Uk; Clayton, Geoffrey C. +4 more
The R Coronae Borealis (RCB) variables are rare, hydrogen-deficient, carbon-rich supergiants known for large, erratic declines in brightness due to dust formation. Recently, the number of known RCB stars in the Milky Way and Magellanic Clouds has increased from
Optical flares detected on a contact binary: the first photometric and spectroscopic analysis of a long-period low mass ratio contact binary HAT 307-0007476
Esamdin, Ali; Li, Kai; Gao, Xing +12 more
This paper presents the photometric and spectroscopic analysis of a long-period totally eclipsing contact binary (HAT 307-0007476) for the first time. This system is a low mass ratio (
An optically led search for kilonovae to z~0.3 with the Kilonova and Transients Programme (KNTraP)
Rest, Armin; Auchettl, Katie; Valdes, Francisco +15 more
Compact binary mergers detectable in gravitational waves can be accompanied by a kilonova, an electromagnetic transient powered by radioactive decay of newly synthesised r-process elements. A few kilonova candidates have been observed during short gamma-ray burst follow-up, and one found associated with a gravitational wave detection, GW170817. Ho…