Pre-main-sequence isochrones -- III. The Cluster Collaboration isochrone server

Abstract

We present an isochrone server for semi-empirical pre-main-sequence model isochrones in the following systems: Johnson-Cousins, Sloan Digital Sky Survey, Two-Micron All-Sky Survey, Isaac Newton Telescope (INT) Wide-Field Camera, and INT Photometric H$\alpha$ Survey (IPHAS)/UV-Excess Survey (UVEX). The server can be accessed via the Cluster Collaboration webpage {http://www.astro.ex.ac.uk/people/timn/isochrones/}. To achieve this we have used the observed colours of member stars in young clusters with well-established age, distance and reddening to create fiducial loci in the colour-magnitude diagram. These empirical sequences have been used to quantify the discrepancy between the models and data arising from uncertainties in both the interior and atmospheric models, resulting in tables of semi-empirical bolometric corrections (BCs) in the various photometric systems. The model isochrones made available through the server are based on existing stellar interior models coupled with our newly derived semi-empirical BCs. As part of this analysis we also present new cluster parameters for both the Pleiades and Praesepe, yielding ages of $135_{-11}^{+20}$ and $665_{-7}^{+14}\mathrm{Myr}$ as well as distances of $132\pm 2$ and $184\pm 2\mathrm{pc}$ respectively (statistical uncertainty only).

Accepted for publication in MNRAS; 18 pages, 8 figures and 7 tables. Tables 3, 4, 6 and 7 (for which only samples are given in the paper) are available in full at the Cluster Collaboration homepage {http://www.astro.ex.ac.uk/people/timn/Catalogues/paper3.html}

References in corpus (13)

• The Dartmouth Stellar Evolution Database
• Evolution of low-mass star and brown dwarf eclipsing binaries
• The Stellar Populations of Praesepe and Coma Berenices
• M dwarfs: effective temperatures, radii and metallicities
• The Distances to Open Clusters from Main-Sequence Fitting. III. Improved Accuracy with Empirically Calibrated Isochrones
• From star clusters to dwarf galaxies: The properties of dynamically hot stellar systems
• A maximum likelihood method for fitting colour-magnitude diagrams
• Near and Mid-IR Photometry of the Pleiades, and a New List of Substellar Candidate Members
• Fitting the young main-sequence; distances, ages and age spreads
• The effect of rotation on the abundances of the chemical elements of the A-type stars in the Praesepe cluster
• Initial Data Release from the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS)
• Empirical isochrones and relative ages for young stars, and the radiative-convective gap
• The Keele-Exeter young cluster survey: I. Low mass pre-main sequence stars in NGC 2169

Cited by in corpus (2)

• Deep near-infrared adaptive optics observations of a young embedded cluster at the edge of the RCW 41 HII region
• PHL 1445: An eclipsing cataclysmic variable with a substellar donor near the period minimum