Calendar

Oct
5
Fri
Colloquium: David Nataf (Host: Jason Jackiewicz)
Oct 5 @ 3:15 pm – 4:15 pm
Colloquium: David Nataf (Host: Jason Jackiewicz) @ BX102

Clues to Globular Cluster Formation

David Nataf, Johns Hopkins University

Globular clusters are now well-established to host “Second-generation” stars, which show anomalous abundances in some or all of He, C, N, O, Na, Al, Mg, etc.  The simplest explanations for these phenomena typically require the globular clusters to have been ~20x more massive at birth, and to have been enriched by processes which are not consistent with the theoretical predictions of massive star chemical synthesis models. The library of observations is now a vast one, yet there has been comparatively little progress in understanding how globular clusters could have formed and evolved. In this talk I discuss two new insights into the matter. First, I report on a meta-analysis of globular cluster abundances that combined APOGEE and literature data for 28 globular clusters, new trends with globular cluster mass are identified. I discuss the chemical properties of former globular cluster stars that are now part of the field population, and what can be learned.

Jan
30
Thu
Solar-Stellar Group meeting
Jan 30 @ 3:00 pm – 4:00 pm
Feb
6
Thu
Solar-Stellar Group meeting
Feb 6 @ 3:00 pm – 4:00 pm
Feb
13
Thu
Solar-Stellar Group meeting
Feb 13 @ 3:00 pm – 4:00 pm
Feb
20
Thu
Solar-Stellar Group meeting
Feb 20 @ 3:00 pm – 4:00 pm
Feb
27
Thu
Solar-Stellar Group meeting
Feb 27 @ 3:00 pm – 4:00 pm
Mar
5
Thu
Solar-Stellar Group meeting
Mar 5 @ 3:00 pm – 4:00 pm
Mar
12
Thu
Solar-Stellar Group meeting
Mar 12 @ 3:00 pm – 4:00 pm
Mar
19
Thu
Solar-Stellar Group meeting
Mar 19 @ 3:00 pm – 4:00 pm
Mar
26
Thu
Solar-Stellar Group meeting
Mar 26 @ 3:00 pm – 4:00 pm