Milone, AntoninoBedin, L RCassisi, SPiotto, GAnderson, JayPietrinferni, ABuonanno, R2015-12-130004-6361http://hdl.handle.net/1885/74654We used Hubble Space Telescope observations to study the young cluster NGC 1844 in the Large Magellanic Cloud (LMC). We estimated the fraction and the mass-ratio distribution of photometric binaries and report that the main sequence presents an intrinsicAuthor/s retain copyrightKeywords: Binaries: general; Globular clusters: individual; Hubble space telescopes; Large magellanic clouds; Magellanic Clouds; Stars: Population II; Stellar populations; Stellar rotation; Galaxies; Helium; Photometry; Stars Binaries: general; Globular clusters: individual: NGC 1844; Magellanic Clouds; Stars: Population II201310.1051/0004-6361/2012205672016-02-24