Astronomy Colloquium Speaker Calendar

View Full Calendar
Stanghellini

Astronomy Colloquium - "Chemical evolution of star-forming galaxies through H II region and planetary nebula abundances"

Event Type
Seminar/Symposium
Sponsor
Department of Astronomy
Virtual
wifi event
Date
Oct 12, 2021   3:45 pm  
Speaker
Dr. Letizia Stanghellini, NOIRLab
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-265-8226
Views
22

The metallicity of galaxies carries the signature of their chemical evolution through cosmic time,
changing according to star formation history, gas accretion during the early evolutionary stages,
and subsequent gas inflows and outflows. To make progress is essential to constrain the
cosmology-based models of chemical evolution with observables such as galactic metallicity
gradients.
Planetary nebulae (PNe) and HII regions are ideally suited to characterize the gas-phase
metallicity in the Milky Way and other star-forming galaxies. The abundance of elements that
do not vary during their progenitor’s evolution pinpoints the medium metallicity at the time of
progenitor formation. The different progenitor’s stellar mass of PNe and HII regions probe
different epochs in galaxy history that allow the study of gradients and their time evolution.
I will discuss metallicity gradient and their evolution in star-forming galaxies as constrained by
emission-line probes. Topics will include (1) Dating the PN progenitors through elemental
abundance analysis; (2) Improving the distance scale of Galactic PNe; (3) Comparing direct
abundances of PNe and HII regions in nearby spiral galaxies; (4) Reviewing future facilities that
will dramatically improve these studies and extend them to nearby galaxy clusters and distant
galaxies.

https://go.illinois.edu/AstronomyColloquiumVirtualLink

Topic: Astronomy Department Colloquium
Time: This is a recurring meeting Meet anytime

Join Zoom Meeting
https://go.illinois.edu/AstronomyColloquiumVirtualLink

Meeting ID: 872 1857 5379
Password: 494746

One tap mobile
+13126266799,,87218575379# US (Chicago)
+16513728299,,87218575379# US (Minnesota)

Dial by your location
        +1 312 626 6799 US (Chicago)
        +1 651 372 8299 US (Minnesota)
        +1 786 635 1003 US (Miami)
        +1 929 205 6099 US (New York)
        +1 267 831 0333 US (Philadelphia)
        +1 301 715 8592 US (Washington DC)
        +1 470 250 9358 US (Atlanta)
        +1 470 381 2552 US (Atlanta)
        +1 646 518 9805 US (New York)
        +1 669 900 6833 US (San Jose)
        +1 720 928 9299 US (Denver)
        +1 971 247 1195 US (Portland)
        +1 213 338 8477 US (Los Angeles)
        +1 253 215 8782 US (Tacoma)
        +1 346 248 7799 US (Houston)
        +1 602 753 0140 US (Phoenix)
        +1 669 219 2599 US (San Jose)
        +1 587 328 1099 Canada
        +1 647 374 4685 Canada
        +1 647 558 0588 Canada
        +1 778 907 2071 Canada
        +1 438 809 7799 Canada
        +49 69 7104 9922 Germany
        +49 695 050 2596 Germany
        +82 2 6105 4111 Korea, Republic of
        +82 2 6022 2322 Korea, Republic of
        +44 203 481 5237 The United Kingdom
        +44 203 481 5240 The United Kingdom
        +44 131 460 1196 The United Kingdom
        +81 524 564 439 Japan
        +81 3 4578 1488 Japan
        +61 3 7018 2005 Australia
        +61 8 7150 1149 Australia
        +61 2 8015 6011 Australia
        +52 554 161 4288 Mexico
        +65 3165 1065 Singapore
        +65 3158 7288 Singapore
Meeting ID: 872 1857 5379
Password: 494746
Find your local number: https://illinois.zoom.us/u/kbcdS7lGfJ

Join by SIP
87218575379@zoomcrc.com

Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
221.122.88.195 (China)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia Sydney)
103.122.167.55 (Australia Melbourne)
209.9.211.110 (Hong Kong SAR)
64.211.144.160 (Brazil)
69.174.57.160 (Canada Toronto)
65.39.152.160 (Canada Vancouver)
207.226.132.110 (Japan Tokyo)
149.137.24.110 (Japan Osaka)
Meeting ID: 872 1857 5379
Password: 494746

Join by Skype for Business
https://illinois.zoom.us/skype/87218575379

link for robots only