Outputs (26)

A WISE-based search for debris discs amongst M-dwarfs in nearby, young, moving groups (2017)
Journal Article
Binks, A. S., & Jeffries, R. (2017). A WISE-based search for debris discs amongst M-dwarfs in nearby, young, moving groups. Monthly Notices of the Royal Astronomical Society, 496(1), 579-593. https://doi.org/10.1093/mnras/stx838

We present a search for debris discs amongst M-dwarf members of nearby, young (5–150 Myr) moving groups (MGs) using infrared (IR) photometry, primarily from the Wide Infrared Survey Explorer (WISE). A catalogue of 100 MG M dwarfs that have suitable W... Read More about A WISE-based search for debris discs amongst M-dwarfs in nearby, young, moving groups.

The Gaia-ESO Survey: the inner disk, intermediate-age open cluster Trumpler 23 (2017)
Journal Article
Jeffries. (2017). The Gaia-ESO Survey: the inner disk, intermediate-age open cluster Trumpler 23. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/201629345

Context. Trumpler 23 is a moderately populated, intermediate-age open cluster within the solar circle at a RGC ~ 6 kpc. It is in a crowded field very close to the Galactic plane and the color–magnitude diagram shows significant field contamination an... Read More about The Gaia-ESO Survey: the inner disk, intermediate-age open cluster Trumpler 23.

The Gaia-ESO Survey: revisiting the Li-rich giant problem (2016)
Journal Article
Casey, A., Ruchti, G., Masseron, T., Randich, S., Gilmore, G., Lind, K., …Valentini, M. (2016). The Gaia-ESO Survey: revisiting the Li-rich giant problem. Monthly Notices of the Royal Astronomical Society, 461(3), 3336 - 3352. https://doi.org/10.1093/mnras/stw1512

The discovery of lithium-rich giants contradicts expectations from canonical stellar evolution. Here we report on the serendipitous discovery of 20 Li-rich giants observed during the Gaia-ESO Survey, which includes the first nine Li-rich giant stars... Read More about The Gaia-ESO Survey: revisiting the Li-rich giant problem.

The Gaia-ESO Survey: Lithium depletion in the Gamma Velorum cluster and inflated radii in low-mass pre-main-sequence stars (2016)
Journal Article
Jeffries. (2016). The Gaia-ESO Survey: Lithium depletion in the Gamma Velorum cluster and inflated radii in low-mass pre-main-sequence stars. Monthly Notices of the Royal Astronomical Society, 1456-1465. https://doi.org/10.1093/mnras/stw2458

We show that non-magnetic models for the evolution of pre-main-sequence (PMS) stars cannot simultaneously describe the colour–magnitude diagram (CMD) and the pattern of lithium depletion seen in the cluster of young, low-mass stars surrounding ?2 Vel... Read More about The Gaia-ESO Survey: Lithium depletion in the Gamma Velorum cluster and inflated radii in low-mass pre-main-sequence stars.

The Gaia-ESO Survey: Pre-Main Sequence Stars in the Young Open Cluster NGC 3293 (2016)
Journal Article
Delgado, A., Sampedro, L., Alfaro, E., Costado, M., Yun, J., Frasca, A., …Magrini, L. (2016). The Gaia-ESO Survey: Pre-Main Sequence Stars in the Young Open Cluster NGC 3293. Monthly Notices of the Royal Astronomical Society, 460(3), 3305-3315. https://doi.org/10.1093/mnras/stw1217

The young open cluster NGC3293 is included in the observing program of the Gaia-ESO survey (GES). The radial velocity values provided have been used to assign cluster membership probabilities by means of a single-variable parametric analysis. These m... Read More about The Gaia-ESO Survey: Pre-Main Sequence Stars in the Young Open Cluster NGC 3293.

The Gaia-ESO Survey: A lithium-rotation connection at 5 Myr? (2016)
Journal Article
Bouvier, J., Lanzafame, A., Venuti, L., Klutsch, A., Jeffries, R., Frasca, A., …Zwitter, T. (2016). The Gaia-ESO Survey: A lithium-rotation connection at 5 Myr?. Astronomy and Astrophysics, 590, Article A78. https://doi.org/10.1051/0004-6361/201628336

Context The evolution of lithium abundance in cool dwarfs provides a unique probe of nonstandard processes in stellar evolution. Aims We investigate the lithium content of young low-mass stars in the 5 Myr old, star forming region NGC 2264 and i... Read More about The Gaia-ESO Survey: A lithium-rotation connection at 5 Myr?.

The Gaia-ESO Survey: membership and initial mass function of the. Velorum cluster (2016)
Journal Article
Jeffries. (2016). The Gaia-ESO Survey: membership and initial mass function of the. Velorum cluster. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201527875

Context. Understanding the properties of young open clusters, such as the initial mass function (IMF), star formation history, and dynamic evolution, is crucial for obtaining reliable theoretical predictions of the mechanisms involved in the star for... Read More about The Gaia-ESO Survey: membership and initial mass function of the. Velorum cluster.

The Gaia-ESO Survey: Dynamical analysis of the L1688 region in Ophiuchus (2016)
Journal Article
Jeffries, R., & Wright, N. J. (2016). The Gaia-ESO Survey: Dynamical analysis of the L1688 region in Ophiuchus. Astronomy and Astrophysics Supplement Series, https://doi.org/10.1051/0004-6361/201527253

The Gaia ESO Public Spectroscopic Survey (GES) is providing the astronomical community with high-precision measurements of many stellar parameters including radial velocities (RVs) of stars belonging to several young clusters and star-forming regions... Read More about The Gaia-ESO Survey: Dynamical analysis of the L1688 region in Ophiuchus.

The Gaia-ESO Survey: Stellar radii in the young open clusters NGC 2264, NGC 2547, and NGC 2516 (2016)
Journal Article
Jackson, R. J., Jeffries, R. D., Randich, S., Bragaglia, A., Carraro, G., Costado, M., …Zaggia, S. (2016). The Gaia-ESO Survey: Stellar radii in the young open clusters NGC 2264, NGC 2547, and NGC 2516. Astronomy and Astrophysics Supplement Series, 586, Article A52. https://doi.org/10.1051/0004-6361/201527507

Context. Rapidly rotating, low-mass members of eclipsing binary systems have measured radii that are significantly larger than predicted by standard evolutionary models. It has been proposed that magnetic activity is responsible for this radius infla... Read More about The Gaia-ESO Survey: Stellar radii in the young open clusters NGC 2264, NGC 2547, and NGC 2516.

The Gaia-ESO Survey: chemical signatures of rocky accretion in a young solar-type star (2015)
Journal Article
Jeffries. (2015). The Gaia-ESO Survey: chemical signatures of rocky accretion in a young solar-type star. Astronomy and Astrophysics Supplement Series, https://doi.org/10.1051/0004-6361/201526896

It is well known that newly formed planetary systems undergo processes of orbital reconfiguration and planetary migration. As a result, planets or protoplanetary objects may accrete onto the central star, being fused and mixed into its external layer... Read More about The Gaia-ESO Survey: chemical signatures of rocky accretion in a young solar-type star.