All Outputs (12)

The Age of Taurus: Environmental Effects on Disc Lifetimes (2015)
Journal Article
Rees, J. M., Wilson, T., Bell, C. P. M., Jeffries, R. D., & Naylor, T. (2015). The Age of Taurus: Environmental Effects on Disc Lifetimes. Proceedings of the International Astronomical Union, 10(S314), 205-206. https://doi.org/10.1017/s1743921315006286

Using semi-empirical isochrones, we find the age of the Taurus star-forming region to be 3-4 Myr. Comparing the disc fraction in Taurus to young massive clusters suggests discs survive longer in this low density environment. We also present a method... Read More about The Age of Taurus: Environmental Effects on Disc Lifetimes.

Spectroscopic confirmation of M-dwarf candidate members of the Beta Pictoris and AB Doradus Moving Groups (2015)
Journal Article
Binks, A., & Jeffries, R. (2016). Spectroscopic confirmation of M-dwarf candidate members of the Beta Pictoris and AB Doradus Moving Groups. Monthly Notices of the Royal Astronomical Society, 455(3), 3345-3358. https://doi.org/10.1093/mnras/stv2431

Optical spectroscopic observations are reported for 24 and 23, nearby, proper-motion-selected M-dwarf candidate members of the Beta Pictoris and AB Doradus moving groups (BPMG and ABDMG). Using kinematic criteria, the presence of both Halpha emission... Read More about Spectroscopic confirmation of M-dwarf candidate members of the Beta Pictoris and AB Doradus Moving Groups.

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.

The Gaia-ESO Survey: empirical determination of the precision of stellar radial velocities and projected rotation velocities (2015)
Journal Article
Jeffries, & Jackson, R. (2015). The Gaia-ESO Survey: empirical determination of the precision of stellar radial velocities and projected rotation velocities. Astronomy and Astrophysics Supplement Series, https://doi.org/10.1051/0004-6361/201526248

Context. The Gaia-ESO Survey (GES) is a large public spectroscopic survey at the European Southern Observatory Very Large Telescope.

Aims. A key aim is to provide precise radial velocities (RVs) and projected equatorial velocities (vsini) for repr... Read More about The Gaia-ESO Survey: empirical determination of the precision of stellar radial velocities and projected rotation velocities.

A kinematically unbiased search for nearby young stars in the Northern hemisphere selected using SuperWASP rotation periods (2015)
Journal Article
Binks, A., Jeffries, R., & Maxted, P. (2015). A kinematically unbiased search for nearby young stars in the Northern hemisphere selected using SuperWASP rotation periods. Monthly Notices of the Royal Astronomical Society, 452(1), 173-192. https://doi.org/10.1093/mnras/stv1309

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 ROSAT All-Sky... Read More about A kinematically unbiased search for nearby young stars in the Northern hemisphere selected using SuperWASP rotation periods.

The Gaia-ESO Survey: N-body modelling of the Gamma Velorum cluster (2015)
Journal Article
Mapelli, M., Vallenari, A., Jeffries, R. D., Gavagnin, E., Cantat-Gaudin, T., Sacco, G. G., …Worley, C. C. (2015). The Gaia-ESO Survey: N-body modelling of the Gamma Velorum cluster. Astronomy & Astrophysics, 578, A35. https://doi.org/10.1051/0004-6361/201425514

The Gaia-ESO Survey has recently unveiled the complex kinematic signature of the Gamma Velorum cluster: this cluster is composed of two kinematically distinct populations (hereafter, population A and B), showing two different velocity dispersions and... Read More about The Gaia-ESO Survey: N-body modelling of the Gamma Velorum cluster.

Gaia-ESO Survey: Analysis of pre-main sequence stellar spectra (2015)
Journal Article
Lanzafame, A. C., Frasca, A., Damiani, F., Franciosini, E., Cottaar, M., Sousa, S. G., …Zaggia, S. (2015). Gaia-ESO Survey: Analysis of pre-main sequence stellar spectra. Astronomy & Astrophysics, 576, Article A80. https://doi.org/10.1051/0004-6361/201424759

Context. The Gaia-ESO Public Spectroscopic Survey is obtaining high-quality spectroscopy of some 100 000 Milky Way stars using the FLAMES spectrograph at the VLT, down to V = 19 mag, systematically covering all the main components of the Milky Way an... Read More about Gaia-ESO Survey: Analysis of pre-main sequence stellar spectra.

The Gaia-ESO Survey: A globular cluster escapee in the Galactic halo (2015)
Journal Article
Jeffries. (2015). The Gaia-ESO Survey: A globular cluster escapee in the Galactic halo. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201425554

A small fraction of the halo field is made up of stars that share the light element (Z = 13) anomalies characteristic of second generation globular cluster (GC) stars. The ejected stars shed light on the formation of the Galactic halo by tracing the... Read More about The Gaia-ESO Survey: A globular cluster escapee in the Galactic halo.

TheGaia-ESO Survey: Chromospheric emission, accretion properties, and rotation inγVelorum and Chamaeleon I (2015)
Journal Article
Frasca, A., Biazzo, K., Lanzafame, A. C., Alcalá, J. M., Brugaletta, E., Klutsch, A., …Worley, C. C. (2015). TheGaia-ESO Survey: Chromospheric emission, accretion properties, and rotation inγVelorum and Chamaeleon I. Astronomy & Astrophysics, 575, A4. https://doi.org/10.1051/0004-6361/201424409

Aims. One of the goals of the Gaia-ESO Survey (GES), which is conducted with FLAMES at the VLT, is the census and the characterization of the low-mass members of very young clusters and associations. We conduct a comparative study of the main propert... Read More about TheGaia-ESO Survey: Chromospheric emission, accretion properties, and rotation inγVelorum and Chamaeleon I.

The Gaia-ESO survey: Discovery of a spatially extended low-mass population in the Vela OB2 association (2015)
Journal Article
Jeffries. (2015). The Gaia-ESO survey: Discovery of a spatially extended low-mass population in the Vela OB2 association. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201425367

The nearby (distance ~ 350–400 pc), rich Vela OB2 association, includes ?2 Velorum, one of the most massive binaries in the solar neighbourhood and an excellent laboratory for investigating the formation and early evolution of young clusters. Recent... Read More about The Gaia-ESO survey: Discovery of a spatially extended low-mass population in the Vela OB2 association.

The Gaia-ESO Survey: Kinematics of seven Galactic globular clusters (2015)
Journal Article
Lardo, C., Pancino, E., Bellazzini, M., Bragaglia, A., Donati, P., Gilmore, G., …Worley, C. C. (2015). The Gaia-ESO Survey: Kinematics of seven Galactic globular clusters. Astronomy & Astrophysics, 573, Article A115. https://doi.org/10.1051/0004-6361/201425036

The Gaia-ESO survey is a large public spectroscopic survey aimed at investigating the origin and formation history of our Galaxy by collecting spectroscopy of representative samples (about 105 Milky Way stars) of all Galactic stellar populations, in... Read More about The Gaia-ESO Survey: Kinematics of seven Galactic globular clusters.

The Gaia-ESO Survey: CNO abundances in the open clusters Trumpler 20, NGC 4815, and NGC 6705 (2015)
Journal Article
Jeffries. (2015). The Gaia-ESO Survey: CNO abundances in the open clusters Trumpler 20, NGC 4815, and NGC 6705. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201424989

Context. The Gaia-ESO Public Spectroscopic Survey will observe a large sample of clusters and cluster stars, covering a wide age-distance-metallicity-position-density parameter space.

Aims. We aim to determine C, N, and O abundances in stars of Ga... Read More about The Gaia-ESO Survey: CNO abundances in the open clusters Trumpler 20, NGC 4815, and NGC 6705.