Cfht large programs

Scientific staff CFHT's scientific staff is composed of resident astronomers, visiting astronomers, a QSO specialist, and remote observers. The science staff is involved in several of the scientific activities ongoing at CFHT. Daily Science Activities Observations The main scientific activity at CFHT consists of the execution of observations for the accepted science programs. Five instruments are available in the QSO mode. Please visit the News section for our latest discoveries.

Users can request and receive archival data and, for some imaging data, previews of CFHT data. This document establishes data policies for the release of data from Technical Commissioning and Science Verification phases performed for a new instrument. Our results will confront current theories and trigger new ones, with the aim of qualitatively improving our understanding of the complex interplay between stellar magnetism and binarity.

MaTYSSE is a large program addressing major unsolved issues regarding the formation of Sun-like stars and their planetary systems, and in particular about the strong impact of magnetic fields on these initial steps so critical for our understanding of the early life of a star like our Sun.

Through this survey, MaTYSSE will also be able to assess whether close-in giant planets called hot Jupiters hJs are significantly more frequent around low-mass protostars than around mature stars and whether magnetospheric gaps can explain the survival of hJs around Sun-like stars.

MaTYSSE also aims at monitoring a few selected cTTSs to document the long-term variation of their magnetic large-scale topologies and investigate how these variations are likely to affect magnetospheric gaps and the survival of hJs.

History of the Magnetic Sun. Magnetic fields have been shown to have a crucial impact on star formation and evolution, activity, angular momentum evolution, and interaction with protoplanetary disks and short period exoplanets. While a wealth of data have been obtained on pre-main sequence, main sequence, and giant stars, we are still missing an understanding of how magnetic properties evolve with time from the PMS to the late-MS.

The aim of the present Large Program is to bridge the gap between early PMS stars Myr and mature MS stars Gyr , by deriving the magnetic topologies of young solar analogues in open clusters that sample the age range from 20 Myr to Myr. We will thus trace the Magnetic History of the Sun. The datasets to be obtained will allow us to investigate the behavior of stellar dynamos as a function of age, rotation and depth of the convective zone as these young suns evolve from the PMS to the MS.

Comparing the magnetic properties of early suns to those of mature ones, we will identify the critical parameters involved in dynamo field generation, including the strong rotational shear at the tachocline predicted by angular momentum evolution models.

Major gains in substellar astrophysics have been achieved thanks to investment in large sky surveys, dedicated photometric and spectroscopic followup, and advances in theoretical efforts. New brown dwarf discoveries now probe extremes of temperature, gravity, and age, extending into the planetary-mass regime and deepening the connection between brown dwarfs and directly imaged exoplanets.

The empirical foundation of these studies are accurate distance measurements via trigonometric parallaxes, yet such faint objects are inaccessible to astrometry in the optical e. We propose a 3-year Large Program using WIRCam to obtain high-precision infrared astrometry of these objects, in order to measure their fundamental parameters and to robustly test theoretical models of substellar evolution and ultracool atmospheres.

This program leverages our expertise, methods, and observations from the long-running WIRCam parallax program conducted by UH. Jean-Charles Cuillandre F and Dr.