Bibcode
Sabbi, E.; Calzetti, D.; Ubeda, L.; Adamo, A.; Cignoni, M.; Thilker, D.; Aloisi, A.; Elmegreen, B. G.; Elmegreen, D. M.; Gouliermis, D. A.; Grebel, E. K.; Messa, M.; Smith, L. J.; Tosi, M.; Dolphin, A.; Andrews, J. E.; Ashworth, G.; Bright, S. N.; Brown, T. M.; Chandar, R.; Christian, C.; Clayton, G. C.; Cook, D. O.; Dale, D. A.; de Mink, S. E.; Dobbs, C.; Evans, A. S.; Fumagalli, M.; Gallagher, J. S., III; Grasha, K.; Herrero, A.; Hunter, D. A.; Johnson, K. E.; Kahre, L.; Kennicutt, R. C.; Kim, H.; Krumholz, M. R.; Lee, J. C.; Lennon, D.; Martin, C.; Nair, P.; Nota, A.; Östlin, G.; Pellerin, A.; Prieto, J.; Regan, M. W.; Ryon, J. E.; Sacchi, E.; Schaerer, D.; Schiminovich, D.; Shabani, F.; Van Dyk, S. D.; Walterbos, R.; Whitmore, B. C.; Wofford, A.
Bibliographical reference
The Astrophysical Journal Supplement Series, Volume 235, Issue 1, article id. 23, 25 pp. (2018).
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3
2018
Citations
78
Refereed citations
71
Description
The Legacy ExtraGalactic UV Survey (LEGUS) is a multiwavelength Cycle 21
Treasury program on the Hubble Space Telescope. It studied 50 nearby
star-forming galaxies in 5 bands from the near-UV to the I-band,
combining new Wide Field Camera 3 observations with archival Advanced
Camera for Surveys data. LEGUS was designed to investigate how star
formation occurs and develops on both small and large scales, and how it
relates to the galactic environments. In this paper we present the
photometric catalogs for all the apparently single stars identified in
the 50 LEGUS galaxies. Photometric catalogs and mosaicked images for all
filters are available for download. We present optical and near-UV
color–magnitude diagrams for all the galaxies. For each galaxy we
derived the distance from the tip of the red giant branch. We then used
the NUV color–magnitude diagrams to identify stars more massive
than 14 M ⊙, and compared their number with the number of
massive stars expected from the GALEX FUV luminosity. Our analysis shows
that the fraction of massive stars forming in star clusters and stellar
associations is about constant with the star formation rate. This lack
of a relation suggests that the timescale for evaporation of unbound
structures is comparable or longer than 10 Myr. At low star formation
rates this translates to an excess of mass in clustered environments as
compared to model predictions of cluster evolution, suggesting that a
significant fraction of stars form in unbound systems.
Based on observations with the NASA/ESA Hubble Space Telescope, obtained
at the Space Telescope Science Institute, which is operated by AURA
Inc., under NASA contract NAS 5-26555.
Related projects
Physical properties and evolution of Massive Stars
This project aims at the searching, observation and analysis of massive stars in nearby galaxies to provide a solid empirical ground to understand their physical properties as a function of those key parameters that gobern their evolution (i.e. mass, spin, metallicity, mass loss, and binary interaction). Massive stars are central objects to
Sergio
Simón Díaz