Program: GS-2018A-Q-420
| Title: | Multiple populations in the most massive Galactic intermediate-age cluster |
| PI: | Ricardo Salinas |
| Co-I(s): | Hwihyun Kim, Jay Strader, Carolina Salgado, Morten Andersen, Camila Valenzuela |
Abstract
Multiple stellar populations have been found in the vast majority of old star clusters in our Galaxy (>10 Gyr), but these are absent in any of the young open clusters in the MW. Is this a sign of a different mechanism in the star formation at high redshift compared to the present Universe? Photometric evidence from intermediate-age clusters in the LMC and SMC indicates multiple populations are present in clusters as young as ~2 Gyr. There is only one intermediate-age Galactic cluster where the existence of multiple populations can be probed, the obscured GLIMPSE-C01. We propose IGRINS spectroscopy of 19 members of this cluster which will allow us to test via spectroscopy for the first time the existence of multiple populations at intermediate ages.