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Identification of Herbig Ae/Be Stars in the Small Magellanic Cloud

Keller, Luke D.; Sloan, G.C.; Oliveira, Joana M.; Kraemer, Kathleen E.; Van Loon, Jacco Th.; Wood, Peter R.; Zijlstra, A.A.; Simon, Joshua D.; Ferreira, Rafael; Garay-MacLean, Martín; Hyatt, Jordan T.; Geidel, Kevin; Quinn, Joseph; Santoro, Daniel; Knapp, Tori

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Luke D. Keller

G.C. Sloan

Kathleen E. Kraemer

Peter R. Wood

A.A. Zijlstra

Joshua D. Simon

Rafael Ferreira

Martín Garay-MacLean

Jordan T. Hyatt

Kevin Geidel

Joseph Quinn

Daniel Santoro

Tori Knapp


Protoplanetary disks orbiting intermediate-mass stars, Herbig Ae/Be stars, that have formed in a metal-poor environment may evolve differently than their Galactic cousins. A study of the planet-formation process in such an environment requires identification and characterization of a sample of candidates. We have observed several stars in the Small Magellanic Cloud, a nearby metal-poor dwarf galaxy, that have optical spectral properties of Herbig Ae/Be stars, including strong Ha emission, blue continuum excess, and spectral types ranging from early G to B. Infrared spectra of these sources from the Spitzer Space Telescope show strong excess emission indicating the presence of silicate dust, molecular and atomic gas, and polycyclic aromatic hydrocarbons. We present an analysis of the likelihood that these candidates are Herbig Ae/Be stars. This identification is the necessary first step to future investigations that will examine the role of metallicity in the evolution of protoplanetary disks.


Keller, L. D., Sloan, G., Oliveira, J. M., Kraemer, K. E., Van Loon, J. T., Wood, P. R., …Knapp, T. (2019). Identification of Herbig Ae/Be Stars in the Small Magellanic Cloud. Astrophysical Journal, 878(2), 147 -147.

Journal Article Type Article
Acceptance Date May 7, 2019
Publication Date Jun 24, 2019
Journal Astrophysical Journal
Print ISSN 0004-637X
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 878
Issue 2
Pages 147 -147
Keywords infrared, stars, Magellanic Clouds, protoplanetary disks, variables, T Tauri, Herbig Ae/Be
Publisher URL


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