Studying the environment of AT2018cow with MUSE Lyman, J. D. Galbany González, Lluis Sánchez, S. F. Anderson, J. P. Kuncarayakti, H. Stars: massive Supernovae: general Supernovae: individual: AT2018cow Galaxies: individual: CGCG137-068 AT2018cow was the nearest and best studied example of a new breed of extra-galactic, luminous and rapidly-evolving transient. Both the progenitor systems and explosion mechanisms of these rapid transients remain a mystery { the energetics, spectral signa- tures, and timescales make them challenging to interpret in established classes of super- novae and tidal disruption events. The rich, multi-wavelength data-set of AT2018cow has still left several interpretations viable to explain the nature of this event. In this paper we analyse integral- eld spectroscopic data of the host galaxy, CGCG137-068, to compare environmental constraints with leading progenitor models. We nd the explosion site of AT2018cow to be very typical of core-collapse supernovae (known to form from stars with MZAMS 8-25 M ), and infer a young stellar population age at the explosion site of few 10Myr, at slightly sub-solar metallicity. When comparing to expectations for exotic intermediate-mass black hole (IMBH) tidal disruption events, we nd no evidence for a potential host system of the IMBH. In particular, there are no abrupt changes in metallicity or kinematics in the vicinity of the explosion site, ar- guing against the presence of a distinct host system. The proximity of AT2018cow to strong star-formation in the host galaxy makes us favour a massive stellar progenitor for this event. 2020-12-02T10:06:53Z 2020-12-02T10:06:53Z 2020-05-01 journal article Published version: Lyman, J. D., Galbany, L., Sánchez, S. F., Anderson, J. P., Kuncarayakti, H., & Prieto, J. L. (2020). Studying the environment of AT 2018cow with MUSE. Monthly Notices of the Royal Astronomical Society, 495(1), 992-999. [DOI:10.1093/mnras/staa1243] http://hdl.handle.net/10481/64587 10.1093/mnras/staa1243 eng info:eu-repo/grantAgreement/EC/HORIZON2020/839090 http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access Atribución-NoComercial-SinDerivadas 3.0 España Oxford Univ Press