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Ground-based detection of G star superflares with NGTS

CEH member James Jackman leads a recent study of flares in G-type stars, as observed using NGTS. The study shows that G-stars can have flares many times the energy of the Carrington event, and the primary detection is one of the largest amplitude superflares detected from a bright G star.

This work was published in Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 4, p.4655-4664

Open access link: arXiv

CEH members involved: James Jackman (lead), Peter Wheatley, Chloe Pugh, Boris Gänsicke, Anne-Marie Broomhall, David Armstrong & James McCormac


Cool DZ white dwarfs II: compositions and evolution of old remnant planetary systems

CEH member Mark Hollands leads a new study which examines pollution of cool DZ white dwarfs.

This work was published in Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 1, p.93-111

Open access link: arXiv

CEH members involved: Mark Hollands (lead), Boris Gänsicke


Automatic vetting of planet candidates from ground based surveys: Machine learning with NGTS

CEH member David Armstrong has published a new study on automatic vetting of exoplanet candidates using machine learning techniques. In this work he applies it to candidates from NGTS, but the technique is extendable to other transiting exoplanet surveys.

This work was published in Monthly Notices of the Royal Astronomical Society, Volume 478, Issue 3, August 2018, Pages 4225–4237

Open access link: arXiv

CEH members involved: David Armstrong (lead), James McCormac, Daniel Bayliss, Tom Louden, Don Pollacco, Richard West & Peter Wheatley


Unmasking the hidden NGTS-3Ab: a hot Jupiter in an unresolved binary system

The Next Generation Transit Survey, which is led by CEH member Peter Wheatley, has publised its third planet discovery. NGTS-3Ab is in an unresolved binary system, and vetting the planet was a challenging task that produced new insights in BIS correlations in exoplanet observations.

This work was published in Monthly Notices of the Royal Astronomical Society, Volume 478, Issue 4, August 2018, Pages 4720–4737

Open access link: arXiv

CEH members involved: James McCormac, David Armstrong, Benjamin Cooke, Boris Gänsicke, Tom Louden, Don Pollacco & Peter Wheatley


Unstable low-mass planetary systems as drivers of white dwarf pollution

A new study examining white dwarf pollution, and featuring contributions from CEH members Dimitri Veras and Boris Gänsicke, concludes that if planet-planet scattering is responsible for the phenomenon then many such objects can be expected to host (currently undetectable) super-Earth planets on orbits of several au and beyond.

This work was published in Monthly Notices of the Royal Astronomical Society, Volume 476, Issue 3, p.3939-3955

Open access link: arXiv

CEH members involved: Dimitri Veras & Boris Gänsicke


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