CLusters in the Uv as EngineS (CLUES): I. Survey presentation \& FUV spectral analysis of the stellar light
M. Sirressi, A. Adamo, M. Hayes, S. Osborne, S. Hernandez, J., Chisholm, M. Messa, L. J. Smith, A. Wofford, A. Fox, A. Mizener, C. Usher, A., Bik, D. Calzetti, E. Sabbi, E. Schinnerer, G. \"Ostlin, K. Grasha, M., Cignoni, M. Fumagalli

TL;DR
The CLUES survey uses HST FUV spectroscopy and photometry to analyze young, massive star clusters, revealing their ages, metallicities, and extinctions, and improving understanding of stellar populations in galaxies.
Contribution
This paper presents the first detailed analysis of 20 young star clusters using combined FUV spectroscopy and photometry, highlighting the advantages of spectroscopy in constraining stellar properties.
Findings
FUV spectroscopy better constrains stellar metallicities.
Photometric and spectroscopic ages agree for clusters younger than 5 Myr.
Mass estimates are consistent within a factor of 2.
Abstract
The CLusters in the Uv as EngineS (CLUES) survey is a Cosmic Origins Spectrograph (COS) campaign aimed at acquiring the 1130 to 1770 {\AA}, restframe spectroscopy of very young (<20 Myr) and massive (>10^4 solar masses) star clusters in galaxies that are part of the Hubble treasury program Legacy ExtraGalactic Uv Survey (LEGUS). In this first paper of a series, we describe the CLUES sample consisting of 20 young star clusters and report their physical properties as derived by both multi-wavelength photometry and far-UV (FUV) spectroscopy with Hubble Space Telescope (HST). Thanks to the synergy of the two different datasets we build a coherent picture of the diverse stellar populations found in each region (with sizes of 40 to 160 pc). We associate the FUV-brightest stellar population to the central targeted star cluster and the other modeled population to the diffuse stars that are…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Scientific Research and Discoveries
