Calendar

Oct
5
Fri
Astro-ph Discussion
Oct 5 @ 11:30 am – 12:00 pm
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.

Oct
6
Sat
Cume #427
Oct 6 @ 9:30 am – 12:00 pm
Oct
8
Mon
ASTR 545 – Stellar Spectroscopy
Oct 8 @ 11:00 am – 12:15 pm
Pizza lunch: Patrick Gaulme
Oct 8 @ 12:30 pm – 1:30 pm
Pizza lunch: Patrick Gaulme @ AY 119

Red giants, eclipsing binaries, and asteroseismology.

Patrick Gaulme, Max Planck Institute for Solar System Research

Planetary Group meeting
Oct 8 @ 2:00 pm – 3:00 pm
Astr110 Observatory
Oct 8 @ 9:00 pm – 10:00 pm
Oct
9
Tue
ASTR 620 – Planetary Processes
Oct 9 @ 8:55 am – 10:10 am
ASTR 555 – Galaxies I
Oct 9 @ 11:45 am – 1:00 pm
Society of Astronomy Students Meeting
Oct 9 @ 4:00 pm – 5:00 pm