Properties of oscillation modes in subgiant stars observed by kepler

O. Benomar; T. R. Bedding; B. Mosser; D. Stello; K. Belkacem; R. A. Garcia; T. R. White; C. A. Kuehn; S. Deheuvels; J. Christensen-Dalsgaard

doi:10.1088/0004-637X/767/2/158

Properties of oscillation modes in subgiant stars observed by kepler

O. Benomar, T. R. Bedding, B. Mosser, D. Stello, K. Belkacem, R. A. Garcia, T. R. White, C. A. Kuehn, S. Deheuvels, J. Christensen-Dalsgaard

Center for Space Science

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

Abstract

Mixed modes seen in evolved stars carry information on their deeper layers that can place stringent constraints on their physics and on their global properties (mass, age, etc.). In this study, we present a method to identify and measure all oscillatory mode characteristics (frequency, height, width). Analyzing four subgiant stars, we present the first measure of the effect of the degree of mixture on the ℓ = 1 mixed mode characteristics. We also show that some stars have measurable ℓ = 2 mixed modes and discuss the interest of their measure to constrain the deeper layers of stars.

Original language	English (US)
Article number	158
Journal	Astrophysical Journal
Volume	767
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/767/2/158
State	Published - Apr 20 2013

Keywords

asteroseismology
methods: data analysis
stars: interiors
stars: oscillations

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/767/2/158

Cite this

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title = "Properties of oscillation modes in subgiant stars observed by kepler",

abstract = "Mixed modes seen in evolved stars carry information on their deeper layers that can place stringent constraints on their physics and on their global properties (mass, age, etc.). In this study, we present a method to identify and measure all oscillatory mode characteristics (frequency, height, width). Analyzing four subgiant stars, we present the first measure of the effect of the degree of mixture on the ℓ = 1 mixed mode characteristics. We also show that some stars have measurable ℓ = 2 mixed modes and discuss the interest of their measure to constrain the deeper layers of stars.",

keywords = "asteroseismology, methods: data analysis, stars: interiors, stars: oscillations",

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language = "English (US)",

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TY - JOUR

T1 - Properties of oscillation modes in subgiant stars observed by kepler

AU - Benomar, O.

AU - Bedding, T. R.

AU - Mosser, B.

AU - Stello, D.

AU - Belkacem, K.

AU - Garcia, R. A.

AU - White, T. R.

AU - Kuehn, C. A.

AU - Deheuvels, S.

AU - Christensen-Dalsgaard, J.

PY - 2013/4/20

Y1 - 2013/4/20

N2 - Mixed modes seen in evolved stars carry information on their deeper layers that can place stringent constraints on their physics and on their global properties (mass, age, etc.). In this study, we present a method to identify and measure all oscillatory mode characteristics (frequency, height, width). Analyzing four subgiant stars, we present the first measure of the effect of the degree of mixture on the ℓ = 1 mixed mode characteristics. We also show that some stars have measurable ℓ = 2 mixed modes and discuss the interest of their measure to constrain the deeper layers of stars.

AB - Mixed modes seen in evolved stars carry information on their deeper layers that can place stringent constraints on their physics and on their global properties (mass, age, etc.). In this study, we present a method to identify and measure all oscillatory mode characteristics (frequency, height, width). Analyzing four subgiant stars, we present the first measure of the effect of the degree of mixture on the ℓ = 1 mixed mode characteristics. We also show that some stars have measurable ℓ = 2 mixed modes and discuss the interest of their measure to constrain the deeper layers of stars.

KW - asteroseismology

KW - methods: data analysis

KW - stars: interiors

KW - stars: oscillations

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DO - 10.1088/0004-637X/767/2/158

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JO - Astrophysical Journal

JF - Astrophysical Journal

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ER -

Properties of oscillation modes in subgiant stars observed by kepler

Abstract

Keywords

ASJC Scopus subject areas

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