Thermal infrared images of the remarkable young nearby multiple star HD 98800

Robert D. Gehrz; Nathan Smith; Frank J. Low; Joachim Krautter; Joshua G. Nollenberg; Terry J. Jones

doi:10.1086/311861

Thermal infrared images of the remarkable young nearby multiple star HD 98800

Robert D. Gehrz, Nathan Smith, Frank J. Low, Joachim Krautter, Joshua G. Nollenberg, Terry J. Jones

Research output: Contribution to journal › Article › peer-review

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Abstract

We present thermal infrared images of the unusual multiple stellar system HD 98800, which contains two double-star systems (A and B) separated by ≈0″.8 in the north/south direction. This system may have formed in a recent burst of star formation in a very low mass cloud in the local solar neighborhood. Our images resolve the A and B components. Both A and B emit roughly equal fluxes at 4.71 μm, where radiation is primarily photospheric. The northern component (B) is about 3.7 times brighter than the southern component (A) at 9.78 μm where the radiation is due to thermal emission from dust, showing that 78% of the circumstellar dust in the system resides around component B. The two primary components are nearly identical K5 V pre-main-sequence stars, both with very significant amounts of dust emission. The dust system around the B component may have size, temperature, and possible structure analogous to those of a primitive zodiacal cloud.

Original language	English (US)
Pages (from-to)	L55-L58
Journal	Astrophysical Journal
Volume	512
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/311861
State	Published - Feb 10 1999

Bibliographical note

Funding Information:
We are grateful to Patrice Bouchet of ESO, who assisted with the observations, and to an anonymous referee for suggesting several revisions that substantially improved our presentation. IR astronomy at the University of Minnesota is supported by NSF, NASA, the Department of Defense, and the Graduate School of the University of Minnesota.

Keywords

Binaries: Visual
Circumstellar matter
Infrared: Stars
Stars: Individual (HD 98800)
Stars: Pre-main-sequence

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title = "Thermal infrared images of the remarkable young nearby multiple star HD 98800",

abstract = "We present thermal infrared images of the unusual multiple stellar system HD 98800, which contains two double-star systems (A and B) separated by ≈0″.8 in the north/south direction. This system may have formed in a recent burst of star formation in a very low mass cloud in the local solar neighborhood. Our images resolve the A and B components. Both A and B emit roughly equal fluxes at 4.71 μm, where radiation is primarily photospheric. The northern component (B) is about 3.7 times brighter than the southern component (A) at 9.78 μm where the radiation is due to thermal emission from dust, showing that 78% of the circumstellar dust in the system resides around component B. The two primary components are nearly identical K5 V pre-main-sequence stars, both with very significant amounts of dust emission. The dust system around the B component may have size, temperature, and possible structure analogous to those of a primitive zodiacal cloud.",

keywords = "Binaries: Visual, Circumstellar matter, Infrared: Stars, Stars: Individual (HD 98800), Stars: Pre-main-sequence",

author = "Gehrz, {Robert D.} and Nathan Smith and Low, {Frank J.} and Joachim Krautter and Nollenberg, {Joshua G.} and Jones, {Terry J.}",

note = "Funding Information: We are grateful to Patrice Bouchet of ESO, who assisted with the observations, and to an anonymous referee for suggesting several revisions that substantially improved our presentation. IR astronomy at the University of Minnesota is supported by NSF, NASA, the Department of Defense, and the Graduate School of the University of Minnesota.",

year = "1999",

month = feb,

day = "10",

doi = "10.1086/311861",

language = "English (US)",

volume = "512",

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journal = "Astrophysical Journal",

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T1 - Thermal infrared images of the remarkable young nearby multiple star HD 98800

AU - Gehrz, Robert D.

AU - Smith, Nathan

AU - Low, Frank J.

AU - Krautter, Joachim

AU - Nollenberg, Joshua G.

AU - Jones, Terry J.

N1 - Funding Information: We are grateful to Patrice Bouchet of ESO, who assisted with the observations, and to an anonymous referee for suggesting several revisions that substantially improved our presentation. IR astronomy at the University of Minnesota is supported by NSF, NASA, the Department of Defense, and the Graduate School of the University of Minnesota.

PY - 1999/2/10

Y1 - 1999/2/10

N2 - We present thermal infrared images of the unusual multiple stellar system HD 98800, which contains two double-star systems (A and B) separated by ≈0″.8 in the north/south direction. This system may have formed in a recent burst of star formation in a very low mass cloud in the local solar neighborhood. Our images resolve the A and B components. Both A and B emit roughly equal fluxes at 4.71 μm, where radiation is primarily photospheric. The northern component (B) is about 3.7 times brighter than the southern component (A) at 9.78 μm where the radiation is due to thermal emission from dust, showing that 78% of the circumstellar dust in the system resides around component B. The two primary components are nearly identical K5 V pre-main-sequence stars, both with very significant amounts of dust emission. The dust system around the B component may have size, temperature, and possible structure analogous to those of a primitive zodiacal cloud.

AB - We present thermal infrared images of the unusual multiple stellar system HD 98800, which contains two double-star systems (A and B) separated by ≈0″.8 in the north/south direction. This system may have formed in a recent burst of star formation in a very low mass cloud in the local solar neighborhood. Our images resolve the A and B components. Both A and B emit roughly equal fluxes at 4.71 μm, where radiation is primarily photospheric. The northern component (B) is about 3.7 times brighter than the southern component (A) at 9.78 μm where the radiation is due to thermal emission from dust, showing that 78% of the circumstellar dust in the system resides around component B. The two primary components are nearly identical K5 V pre-main-sequence stars, both with very significant amounts of dust emission. The dust system around the B component may have size, temperature, and possible structure analogous to those of a primitive zodiacal cloud.

KW - Binaries: Visual

KW - Circumstellar matter

KW - Infrared: Stars

KW - Stars: Individual (HD 98800)

KW - Stars: Pre-main-sequence

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Thermal infrared images of the remarkable young nearby multiple star HD 98800

Abstract

Bibliographical note

Keywords

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