By Andrea Miglio, Patrick Eggenberger, Léo Girardi, Josefina Montalbán
The detection of radial and non-radial solar-like oscillations in hundreds of thousands of G-K giants with CoRoT and Kepler is paving the line for distinctive experiences of stellar populations within the Galaxy. The on hand ordinary seismic constraints enable principally model-independent decision of stellar radii and lots more and plenty, and will be used to figure out the location and age of hundreds of thousands of stars in several areas of the Milky manner, and of giants belonging to open clusters. this kind of shut connection among stellar evolution, Galactic evolution, and asteroseismology opens a brand new very promising gate in our realizing of stars and galaxies.
This e-book represents a average development from the gathering of overview papers provided within the e-book 'Red Giants as Probes of the constitution and Evolution of the Milky Way', which seemed within the Astrophysics and house technology lawsuits sequence in 2012. This sequel quantity comprises assessment papers on spectroscopy, seismology of crimson giants, open questions in Galactic astrophysics, and discusses first effects accomplished by means of combining photometric/spectroscopic and seismic constraints on populations of stars saw by way of CoRoT and Kepler. The publication additionally experiences on discussions among specialist researchers in Galactic evolution, experts in stellar constitution and asteroseismology, and key representatives of intensive ground-based spectroscopic surveys similar to APOGEE and the ESO-GAIA Spectroscopic Survey, which might function a roadmap for destiny endeavours during this box of research.
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The detection of radial and non-radial solar-like oscillations in millions of G-K giants with CoRoT and Kepler is paving the line for distinct stories of stellar populations within the Galaxy. The to be had regular seismic constraints permit principally model-independent selection of stellar radii and lots more and plenty, and will be used to figure out the location and age of hundreds of thousands of stars in several areas of the Milky method, and of giants belonging to open clusters.
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Additional info for Asteroseismology of Stellar Populations in the Milky Way
2014). Promising indicators of global stellar properties include the small separation between radial and quadrupole modes (Montalbán et al. g. Benomar et al. 2013). 3 We assume an extension of the overshooting region equal to 0:2 Hp , where Hp is the pressure scale height at the boundary of the convective core, as defined by the Schwarzschild criterion. 2 OV 1 10 2 10 L/L sun Fig. 4 Mˇ stellar model computed with (solid line) and without (dashed line) extra mixing from the convective core during the main-sequence phase.
2 Asteroseismic Studies of Red-Giant Stars The brief description of the effects of rotation on the properties of low-mass stars presented above has been done in the context of shellular rotation. The outputs of these rotating models, and in particular the quantitative impact of rotational mixing, are sensitive to the prescriptions used for the modelling of meridional circulation and shear instabilities (Meynet et al. 2013). It is thus interesting to consider the observational constraints that are currently available to constrain these dynamical processes, with a peculiar focus on asteroseismic data.
Loeb, A. 1994, ApJ , 421, 828 Effects of Rotation on Stellar Evolution and Asteroseismology of Red Giants Patrick Eggenberger Abstract The impact of rotation on the properties of low-mass stars at different evolutionary stages is first described by discussing the properties of stellar models computed with shellular rotation. The observational constraints that are currently available to progress in our understanding of these dynamical processes are then presented, with a peculiar focus on asteroseismic measurements of red-giant stars.