Assigned ID: 172 ----- Attempting Submission 1 (Thu Feb 24 18:24:23 GMT 2011) ----- HST Phase I Proposal 172 (XSINGS_HST_AO19.apt) successfully submitted. ----- Attempting Submission 2 (Fri Feb 25 13:56:40 GMT 2011) ----- We propose to analyze archival HST WFC3, ACS and WFPC2 data for 5 nearby spiral galaxies (NGC2841, M83, NGC7793, NGC3621 and NGC4631) which are part of the X-SINGS survey (a Chandra Large Project to follow up the Spitzer Infrared Nearby Galaxy Survey sample). The goals of the project are: (a) to identify the optical counterparts of the X-ray sources in these galaxies; (b) determine their recent star-formation history and (c) study their star-cluster populations. This will allow us to address the nature of the accreting sources, and their connection with star-formation and star-cluster properties. These are critical elements for the understanding of X-ray source populations in general and in particular the calibration of accreting-binary population synthesis models. In addition these results will be a great resource for studies of the spatially resolved star-formation history of nearby spiral galaxies.

RESOLVED STELLAR POPULATIONS 12 Medium false 0.0 0.0 false false false false SUPPORTED