The initial mass function in the extended ultraviolet disc of M83

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We thank the anonymous referee, and the MNRAS editors, for comments which improved the quality of this paper. This study is based in part on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, under NASA Contract NAS 5-26555. These observations are associated with Program 10608 (PI: D. Thilker). Support for Program 10608 was provided by NASA through a grant from the Space Telescope Science Institute. This study is based in part on observations made with the Galaxy Evolution Explorer (GALEX). GALEX is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASAs support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d’Etudes Spatiales of France and the Korean Ministry of Science and Technology.
This study is also based in part on observations at Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation.
This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.
SMB was supported by an Australian Postgraduate Award, and this study formed part of her Ph.D. thesis (Bruzzese 2016). CL is funded by a Discovery Early Career Research Award (DE150100618). AGdP acknowledges support from the Spanish MCIUN project AYA2016-75808-R.
We thank Alessandro Bressan for assistance with the PARSEC stellar evolutionary tracks and George Heald, Frank Bigiel, Ed Elson, and Daniel Dale for providing data and helpful discussions. We thank the GHOSTS team for making their data public. We thank Jin Koda for sending us details on the clusters observed in Koda et al. (2012). We thank Samuel Boissier and Mark Seibert for contributing to our application for the Hubble Space Telescope observations presented here and comments which improved the quality of this paper.
SMB and GRM thank the Johns Hopkins University for their hospitality and accommodation during several visits while they worked on this project.