University of Cambridge > Talks.cam > Institute of Astronomy Seminars > The WEAVE-TwiLight Survey: Implementing and Testing a New Low Field Density Observing Mode

The WEAVE-TwiLight Survey: Implementing and Testing a New Low Field Density Observing Mode

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Bright exoplanet host stars provide highly precise stellar and planetary parameters, as well as chemical abundances. However, modern multi-object spectroscopic surveys often neglect stars brighter than 11 visual magnitudes due to their relatively low on-sky number density, resulting in significant observational overhead. The WEAVE -TwiLight Survey (WTLS) will address this gap by employing a groundbreaking observing mode, that allows for observations of low-density/bright star fields, without compromising survey efficiency. With an input catalogue derived primarily from the northern PLATO long-duration phase field, WEAVE -TwiLight will result in a highly homogeneous spectral dataset, characterizing approximately 6,000 future PLATO targets, including 68 confirmed planet hosts. In this talk, I will present the progress made in implementing the new observing mode, alongside preliminary results from test observations obtained in late summer 2024, using WEAVE ’s high-resolution setup. Full-scale science operations for WEAVE -TwiLight are expected to begin in Q2 of 2025.

This talk is part of the Institute of Astronomy Seminars series.

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