The universal red-giant oscillation pattern; an automated determination with CoRoT data

By B. Mosser, K. Belkacem, M. Goupil, E.Michel, Y. Elsworth, C. Barban, T. Kallinger, S. Hekker, J. Deridder, R. Samadi and 5 more. 2010

137 citations recorded by the source corpus.

The CoRoT and Kepler satellites have provided thousands of red-giant oscillation spectra. The analysis of these spectra requires efficient methods for identifying all eigenmode parameters. The assumption of new scaling laws allows us to construct a theoretical oscillation pattern. We then obtain a highly precise determination of the large separation by correlating the observed patterns with this reference. We demonstrate that this pattern is universal and are able to unambiguously assign the eigenmode radial orders and angular degrees. This solves one of the current outstanding problems of asteroseismology hence allowing precise theoretical investigation of red-giant interiors.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/badb46ce26f77d8d89ae330523c3340b03985d0a

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In Astronomy and Astrophysics

1. D. Huber
2. D. Stello
3. W. Chaplin
4. B. Mosser
5. T. Bedding
6. A. Miglio
7. Y. Elsworth
8. S. Hekker

In Instrumentation

1. D. Huber
2. D. Stello
3. W. Chaplin
4. B. Mosser
5. T. Bedding
6. A. Miglio
7. Y. Elsworth
8. S. Hekker

Citations in the corpus

• TESTING SCALING RELATIONS FOR SOLAR-LIKE OSCILLATIONS FROM THE MAIN SEQUENCE TO RED GIANTS USING KEPLER DATA (2011, methodology): “All amplitudes shown have been calculated using the method described by Kjeldsen et al. (2008) with c = 3.04 (Bedding et al. 2010) to convert to amplitude per radial mode.”
• Mixed modes in red-giant stars observed with CoRoT (2011, methodology): “The high density of mixed modes, due to the high values ∆Tobs and the dotted line represents the location of the spurious signature that would correspond to the small separationδν02 (Mosser et al. 2011).”
• Spin down of the core rotation in red giants (2012, background): “Specific features of solar-like oscillations in red giants have been characterized (e.g. Bedding et al. 2010; Mosser et al. 2010; Huber et al. 2010).50 Mixed modes, which correspond to the coupling of gravity waves in the radiative core region and pressure waves in the envelope (Dziembowski et al.…”
• Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler (2012, methodology): “Then, we used the so-called universal pattern to locate the short-lived radial and non-radial pressure modes very precisely (Mosser et al. 2011b).”
• THE APOKASC CATALOG: AN ASTEROSEISMIC AND SPECTROSCOPIC JOINT SURVEY OF TARGETS IN THE KEPLER FIELDS (2014, unknown): “We observed all Kepler Objects of Interest, or KOIs, that fit our magnitude and color cuts, all dwarfs within our magnitude range that had Teff < 5500 K, and selected targets observed by the CoRoT satellite (Mosser et al. 2010).”
• Asteroseismology of Solar-Type and Red-Giant Stars (2013, methodology): “Third, seismic data on RGB stars in principle provide robust ages that probe a wide age range: Once a star has evolved to the RGB its age is determined to a first approximation by the time spent in the core-hydrogen burning phase, which is predominantly a function of mass and metallicity.”
• Characterization of the power excess of solar-like oscillations in red giants with Kepler (2011, methodology): “(8) We have used the mean values e12 = −0.22, e20 = −0.065, e03 = 0.17, and e31 = 0.27 derived from the universal red giant oscillation pattern (Mosser et al. 2011b).”
• ASTEROSEISMIC CLASSIFICATION OF STELLAR POPULATIONS AMONG 13,000 RED GIANTS OBSERVED BY KEPLER (2013, methodology): “We associated the frequencies,ν, with radial or quadrupole (l = 0 and2) modes ifǫ − 0.3 < ν/∆ν mod1 < ǫ + 0.1, whereǫ was derived using the∆ν-ǫ relation fitted to red giant branch stars by Corsaro et al. (2012) based on the formula- tion by Mosser et al. (2011b) (Figure 1(b–d), shaded regions).”
• Mixed modes in red giants: a window on stellar evolution (2014, methodology): “These oscillations have been used to distinguish between stars that are burning only hydrogen in a thin shell around their cores and those that are additionally burning helium inside their cores (Bedding et al. 2011; Mosser et al. 2011a; Stello et al. 2013).”
• Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters (2016, methodology): “We obtained ∆ν and from a fit to the extracted mode frequencies with an extended version of the asymptotic relation, as in Lund et al. (2014a) (see also Mosser et al. 2011, 2013).”
• CALCULATING ASTEROSEISMIC DIAGRAMS FOR SOLAR-LIKE OSCILLATIONS (2011, methodology): “A similar analysis was done for CoRoT data by Mosser et al. (2011b).”
• Red giant masses and ages derived from carbon and nitrogen abundances (2015, unknown): “The raw light curves were prepared as described in Garc´ıa et al. (2011), and the seismic parameters ν max and (cid:4)ν were then measured using five different techniques (Huber et al. 2009; Hekker et al. 2010; Kallinger et al. 2010; Mathur et al. 2010; Mosser et al. 2011).”