SIMBAD references

2011A&A...529A..84B - Astronomy and Astrophysics, volume 529A, 84-84 (2011/5-1)

Amplitudes and lifetimes of solar-like oscillations observed by CoRoT. Red-giant versus main-sequence stars.

BAUDIN F., BARBAN C., BELKACEM K., HEKKER S., MOREL T., SAMADI R., BENOMAR O., GOUPIL M.-J., CARRIER F., BALLOT J., DEHEUVELS S., DE RIDDER J., HATZES A.P., KALLINGER T. and WEISS W.W.

Abstract (from CDS):

The advent of space-borne missions such as CoRoT or Kepler providing photometric data has brought new possibilities for asteroseismology across the H-R diagram. Solar-like oscillations are now observed in many stars, including red giants and main-sequence stars. Based on several hundred identified pulsating red giants, we aim to characterize their oscillation amplitudes and widths. These observables are compared with those of main-sequence stars in order to test trends and scaling laws for these parameters for main-sequence stars and red giants. An automated fitting procedure is used to analyze several hundred Fourier spectra. For each star, a modeled spectrum is fitted to the observed oscillation spectrum, and mode parameters are derived. Amplitudes and widths of red-giant solar-like oscillations are estimated for several hundred modes of oscillation. Amplitudes are relatively high (several hundred ppm) and widths relatively small (very few tenths of a µHz). Widths measured in main-sequence stars show a different variation with the effective temperature from red giants. A single scaling law is derived for mode amplitudes of red giants and main-sequence stars versus their luminosity to mass ratio. However, our results suggest that two regimes may also be compatible with the observations.

Abstract Copyright:

Journal keyword(s): asteroseismology - methods: data analysis - stars: oscillations

Errata: + corrigendum vol. 535 p. C1

Simbad objects: 5

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2011A&A...529A..84B and select 'bookmark this link' or equivalent in the popup menu