Bibcode
Hasselquist, Sten; Nidever, David; Hayes, Christian R.; Anguiano, Borja; Majewski, Steve; Sobeck, Jennifer; Stringfellow, Guy; Beers, Timothy C.; Jonsson, Henrik; Lian, Jianhui; Cohen, Roger; Zasowski, Gail; Mackereth, John T.; Battaglia, G.; Weinberg, David; Lane, Richard R.; Long-Pena, Penelope; Gallart, C.; Villanova, Sandro; Rix, Hans-Walter; Andrews, Brett; Cunha, Katia; Smith, Verne; Choi, Yumi; Geisler, Doug; Carrera, Ricardo; Almeida, Andres; Fernandez-Trincado, Jose G.
Bibliographical reference
American Astronomical Society, AAS Meeting #233, id.#316.01
Advertised on:
1
2019
Citations
1
Refereed citations
1
Description
To date, the SDSS-IV APOGEE survey has obtained S/N > 70 spectra for
over 2,500 red giant stars distributed across much of the Large
Magellanic Cloud (LMC), allowing for the characterization of the
detailed abundance patterns for 10+ chemical elements. In this project,
we interpret the chemical abundance patterns of the LMC by comparing
them to the chemical abundance patterns of the Sagittarius Dwarf Galaxy
(Sgr) and the Milky Way (MW), as well as by invoking chemical evolution
models (such as flexCE and chempy) that include the LMC's star formation
history. Preliminary results show that the LMC shares [Ni/Fe] and
[Al/Fe] deficiencies with Sgr, but exhibits alpha-element abundances
([O/Fe], [Mg/Fe], and [Si/Fe]) that are near-solar. There is also a
correlation with [O/Fe] and [Mg/Fe] with [Fe/H] at [Fe/H] > -1.0.
These results suggest that the LMC exhibited low star formation
efficiency (as compared to Sgr and the MW) at early times, but has since
experienced several starbursts which spawned the stars with [Fe/H] >
-1.0. Using these APOGEE chemical abundance patterns as constraints, we
use chemical evolution models to better characterize the nature
(strength, time, duration, IMF, etc.) of these starbursts.