Identification of herbig ae/be stars in the small magellanic cloud

Luke D. Keller; G. C. Sloan; Joana M. Oliveira; Kathleen E. Kraemer; Jacco Th Van Loon; 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

doi:10.3847/1538-4357/ab204a

Identification of herbig ae/be stars in the small magellanic cloud

Luke D. Keller, G. C. Sloan, Joana M. Oliveira, Kathleen E. Kraemer, Jacco Th Van Loon, 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

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3 Citations (Scopus)

Abstract

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 Hα 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.

Original language	English
Article number	147
Journal	Astrophysical Journal
Volume	878
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ab204a
Publication status	Published - 20 Jun 2019

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Keller, L. D., Sloan, G. C., Oliveira, J. M., Kraemer, K. E., Van Loon, J. T., Wood, P. R., Zijlstra, A. A., Simon, J. D., Ferreira, R., Garay-Maclean, M., Hyatt, J. T., Geidel, K., Quinn, J., Santoro, D., & Knapp, T. (2019). Identification of herbig ae/be stars in the small magellanic cloud. Astrophysical Journal, 878(2), Article 147. https://doi.org/10.3847/1538-4357/ab204a

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title = "Identification of herbig ae/be stars in the small magellanic cloud",

abstract = "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 Hα 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.",

keywords = "Herbig ae/be, Infrared, Stars - magellanic clouds - protoplanetary disks - stars, T tauri, Variables",

author = "Keller, {Luke D.} and Sloan, {G. C.} and Oliveira, {Joana M.} and Kraemer, {Kathleen E.} and {Van Loon}, {Jacco Th} and Wood, {Peter R.} and Zijlstra, {A. A.} and Simon, {Joshua D.} and Rafael Ferreira and Mart{\'i}n Garay-Maclean and Hyatt, {Jordan T.} and Kevin Geidel and Joseph Quinn and Daniel Santoro and Tori Knapp",

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doi = "10.3847/1538-4357/ab204a",

language = "English",

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T1 - Identification of herbig ae/be stars in the small magellanic cloud

AU - Keller, Luke D.

AU - Sloan, G. C.

AU - Oliveira, Joana M.

AU - Kraemer, Kathleen E.

AU - Van Loon, Jacco Th

AU - Wood, Peter R.

AU - Zijlstra, A. A.

AU - Simon, Joshua D.

AU - Ferreira, Rafael

AU - Garay-Maclean, Martín

AU - Hyatt, Jordan T.

AU - Geidel, Kevin

AU - Quinn, Joseph

AU - Santoro, Daniel

AU - Knapp, Tori

PY - 2019/6/20

Y1 - 2019/6/20

N2 - 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 Hα 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.

AB - 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 Hα 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.

KW - Herbig ae/be

KW - Infrared

KW - Stars - magellanic clouds - protoplanetary disks - stars

KW - T tauri

KW - Variables

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U2 - 10.3847/1538-4357/ab204a

DO - 10.3847/1538-4357/ab204a

M3 - Article

SN - 0004-637X

VL - 878

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 147

ER -

Identification of herbig ae/be stars in the small magellanic cloud

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