Explanipedia

The Age and High Energy Environment of the Very Young Transiting Exoplanet TOI 1227b Open

Attila Varga, Joel H. Kastner, A. S. Binks, Simon J. Murphy · 2025

The mid-M star TOI~1227 hosts among the youngest known transiting exoplanets. We have conducted new X-ray imaging and optical spectroscopic observations of TOI 1227 aimed at ascertaining its age and the influence of its high-energy radiati…

A Long-duration Superflare on the K Giant HD 251108 Open

Hans Moritz Günther, Dheeraj R. Pasham, A. S. Binks, S. Czesla, Teruaki Enoto , et al. · 2024

Many giant stars are magnetically active, which causes rotational variability, chromospheric emission lines, and X-ray emission. Large outbursts in these emission features can set limits on the magnetic field strength and thus constrain th…

Walking the Line: Young Stars on the Boundary of the Epsilon Cha and Lower Centaurus Crux Associations Open

Attila Varga, Joel H. Kastner, D. Annie Dickson-Vandervelde, A. S. Binks · 2024

Gaia Data Release 3 (DR3) has provided the largest and most astrometrically precise catalog of nearby stars to date, allowing for a more complete membership census of nearby, young stellar moving groups. These loose associations of young (…

A long-duration superflare on the K giant HD 251108 Open

Hans Moritz Günther, Dheeraj R. Pasham, A. S. Binks, Stefan Czesla, Teruaki Enoto , et al. · 2024

Many giant stars are magnetically active, which causes rotational variability, chromospheric emission lines, and X-ray emission. Large outbursts in these emission features can set limits on the magnetic field strength and thus constrain th…

Spectroscopic Observations of the GALEX Nearby Young Star Survey Sample. I. Nearby Moving Group Candidates Open

Navya Nagananda, Laura Vican, B. Zuckerman, David Rodríguez, A. S. Binks , et al. · 2024

The GALEX Nearby Young Star Search (GALNYSS) yielded the identification of more than 2000 late-type stars that, based on their ultraviolet and infrared colors and pre-Gaia proper motions, are potentially of age Pic and AB Dor moving groups…

tessilator: a one-stop shop for measuring TESS rotation periods Open

A. S. Binks, Hans Moritz Günther · 2024

We present a software package designed to produce photometric light curves and measure rotation periods from full-frame images taken by the Transiting Exoplanet Survey Satellite (TESS), which we name ‘tessilator’. tessilator is the only pu…

TESSILATOR: a one-stop shop for measuring TESS rotation periods Open

A. S. Binks, Hans Moritz Guenther · 2024

We present a software package designed to produce photometric lightcurves and measure rotation periods from full-frame images taken by the Transiting Exoplanet Survey Satellite (TESS), which we name ``TESSILATOR''. TESSILATOR is the only p…

A revised age greater than 50 Myr for the young cluster IC 4665 Open

R. D. Jeffries, R. J. Jackson, A. S. Binks · 2023

IC 4665 is one of only a dozen young open clusters with a ‘lithium depletion boundary’ (LDB) age. Using an astrometrically and spectroscopically filtered sample of cluster members, we show that both the positions of its low-mass stars in G…

A revised age greater than 50 Myr for the young cluster IC 4665 Open

R. D. Jeffries, R. J. Jackson, A. S. Binks · 2023

IC 4665 is one of only a dozen young open clusters with a ``lithium depletion boundary" (LDB) age. Using an astrometrically and spectroscopically filtered sample of cluster members, we show that both the positions of its low mass stars in …

The Gaia-ESO survey: Constraining evolutionary models and ages for young low mass stars with measurements of lithium depletion and rotation Open

A. S. Binks, R. D. Jeffries, G. G. Sacco, R. J. Jackson, Lyra Cao , et al. · 2022

A growing disquiet has emerged in recent years that standard stellar models are at odds with observations of the colour-magnitude diagrams (CMDs) and lithium depletion patterns of pre main sequence (PMS) stars in clusters. In this work we …

The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy Open

S. Randich, G. Gilmore, L. Magrini, G. G. Sacco, R. J. Jackson , et al. · 2022

Context. In the last 15 years different ground-based spectroscopic surveys have been started (and completed) with the general aim of delivering stellar parameters and elemental abundances for large samples of Galactic stars, complementing …

The Gaia-ESO survey: a lithium depletion boundary age for NGC 2232 Open

A. S. Binks, R. D. Jeffries, R. J. Jackson, E. Franciosini, G. G. Sacco , et al. · 2021

Astrometry and photometry from Gaia and spectroscopic data from the Gaia-ESO Survey (GES) are used to identify the lithium depletion boundary (LDB) in the young cluster NGC 2232. A specialized spectral line analysis procedure was used to r…

A kinematically hot population of young stars in the solar neighbourhood Open

A. S. Binks, R. D. Jeffries, N. J. Wright · 2020

In the last three decades several hundred nearby members of young stellar moving groups (MGs) have been identified, but there has been less systematic effort to quantify or characterize young stars that do not belong to previously identifi…

A kinematically unbiased, all-sky search for nearby, young, low-mass stars Open

A. S. Binks, Matthieu Chalifour, Joel H. Kastner, David R. Rodriguez, Simon J. Murphy , et al. · 2019

The past two decades have seen dramatic progress in our knowledge of the population of young stars of age $\lt \!200\,$ Myr that lie within $150\,$ pc of the Sun. These nearby, young stars, most of which are found in loose, comoving groups…

Searching for new young stars in the Northern hemisphere: the Pisces moving group Open

A. S. Binks, R. D. Jeffries, Jacob L. Ward · 2017

Using the kinematically unbiased technique described in Binks, Jeffries & Maxted (2015), we present optical spectra for a further 122 rapidly-rotating (rotation periods < 6 days), X-ray active FGK stars, selected from the SuperWASP survey.…

A WISE-based search for debris discs amongst M dwarfs in nearby, young, moving groups Open

A. S. Binks, R. D. Jeffries · 2017

We present a search for debris discs amongst M-dwarf members of nearby, young\n(5-150 Myr) moving groups (MGs) using infrared (IR) photometry, primarily from\nthe Wide Infrared Survey Explorer (WISE). A catalogue of 100 MG M-dwarfs that\nh…

Spectroscopic confirmation of M-dwarf candidate members of the Beta Pictoris and AB Doradus Moving Groups Open

A. S. Binks, R. D. Jeffries · 2015

Optical spectroscopic observations are reported for 24 and 23, nearby,\nproper-motion-selected M-dwarf candidate members of the Beta Pictoris and AB\nDoradus moving groups (BPMG and ABDMG). Using kinematic criteria, the presence\nof both H…

A kinematically unbiased search for nearby young stars in the Northern hemisphere selected using SuperWASP rotation periods Open

A. S. Binks, R. D. Jeffries, P. F. L. Maxted · 2015

We present a kinematically-unbiased search to identify young, nearby low-mass members of kinematic moving groups (MGs). Objects with both rotation periods shorter than 5 d in the SuperWASP All-Sky Survey and X-ray counterparts in the ROSAT…

A Kinematically Unbiased Search for Nearby Young Stars in the Northern Hemisphere Selected Using SuperWASP Rotation Periods Open

A. S. Binks, R. D. Jeffries, P. F. L. Maxted · 2015

We present a kinematically-unbiased search to identify young, nearby low-mass members of kinematic moving groups (MGs). Objects with both rotation periods shorter than 5 days in the SuperWASP All-Sky Survey and X-ray counterparts in the RO…

Identifying and characterising young, nearby, low-mass members of stellar moving groups Open

A. S. Binks · 2015

Since the early 1990s, several groups of comoving, coeval stars younger than 100Myr and within 100 pc have been revealed. Studying and identifying members in these ‘Nearby Young Moving Groups’ (MGs) is vital because they provide: well char…

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