Stellar ages
No wide spread of stellar ages in the Orion Nebula Cluster
... in stellar contraction ...mean ages or age distri- butions of stars with and without discs, consistent with expectations for a coeval ...low-mass stellar population have ages between ...
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The Mass Growth and Stellar Ages of Galaxies: Observations versus Simulations
... the stellar mass was assembled, as determined from the stellar-mass evolution tracks in the right panel of Figure 1, with the errors estimated from uncertainties from the stellar mass ...The ...
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The age–metallicity relation in the solar neighbourhood from a pilot sample of white dwarf–main sequence binaries
... increasing ages (Twarog 1980; Edvardsson et ...the ages of late-type stars and ages derived using isochrones for a sample of giants, ...derive stellar ages show a substantial scatter in ...
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Surot Madrid, Francisco Ricardo (2018): On the age of the Milky Way bulge stellar population. Dissertation, LMU München: Fakultät für Physik
... the stellar ages in different fields is provided through the comparison between the observations and synthetic stellar population models, which have been carefully tailored to account for the ...
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Towards age/rotation/magnetic activity relation with seismology
... of stellar ages directly impacts the characterization of a plan- etary system as it puts strong constraints on the moment when the system was ...precise stellar ages is a very difficult ...infer ...
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Low metallicities and old ages for three ultra diffuse galaxies in the Coma cluster
... enables stellar population modeling of the full spectrum for stellar ages > 1 Gyr and for metallicities from approximately − ...MIST stellar isochrones ( Choi et ...
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P MaNGA : full spectral fitting and stellar population maps from prototype observations
... with stellar ages and metallicities derived in this paper from full spectral ...with stellar population ages and ...the stellar population ages, as evident in the left-hand-side ...
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Stellar magnetic activity – Star-Planet Interactions
... ionized stellar wind, which couples to the stellar magnetic field on its journey away from the star and thus carries away angular ...how stellar rotation and magnetic activity evolve over ...the ...
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Stellar populations of over one 1000 z ∼ 0 8 galaxies from LEGA C : ages and star formation histories from Dn4000 and Hδ
... each stellar mass bin. The corresponding SSP ages are labeled on the top of the ...SSP ages should be interpreted with ...old stellar populations, the spectral indices evolve little with time ...
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Stellar populations and ages of M82 super star clusters
... the stellar popula- tions, including supernova rates estimated from radio observations, and found that the starburst has been active for 30±60 ...The ages of these SSCs with high near-IR luminosities are ...
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Rotation and stellar evolution
... The CoRoT [34] and Kepler [35] spacecrafts have enabled the observation of solar-like oscillations for a large number of red giants. These observations have led to the determination of rotational frequency splittings of ...
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Oscillations in stellar superflares
... for stellar flares without some un- derlying ...For stellar flares, however, we only have the pe- riod and decay time of the QPP, so the information that can be extracted is severely ...
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Stellar Distance and Velocity
... Stellar parallax is defined as an apparent change in position of a star against the background of more distant objects, due to the movement of the earth revolving around the sun. In order to calculate a distance ...
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Stellar astrophysics: a study of stellar physics with particular reference to low mass stars
... with substellar masses really exist in substantial number. To confirm this, D ’Antona and Mazzitelli (1983) and Kroupa et al. (1990) studied in detail the stellar initial mass function and stressed the importance ...
183
Is stellar multiplicity universal? Tight stellar binaries in the Orion nebula Cluster
... We have conducted a near-infrared survey for close visual binaries among 0.3–2 M ⊙ members of the ONC using the aperture mask- ing technique on the 8-m VLT telescope. This method allows us to probe for the first time the ...
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Stellar magnetism and activity : from stellar interiors to orbiting exoplanets
... from the Sun. Typical error bars for the magnetospheric sizes, calculated by propagating through the errors in Eqs. (5.3) and (5.8), are shown in the upper left corner. They are relatively small and I simply note that ...
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Constraining stellar physics from red-giant stars in binaries – stellar rotation, mixing processes and stellar activity
... of stellar structure and evolution - in particular for solar-like oscillators in this ...the stellar rotation, dynamics and rotational mixing of elements and allows us to learn from the differ- ences we ...
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The calculation of stellar opacity
... FBgTOMBJUflOH TH3SQ&T AMD THB BQPKE jSWSBBY LEVELS £e now have to calculate the perturbed energy levels of the electron states when the potential energy is given by 2.5 using the Coulomb[r] ...
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The maximum effect of convection in stellar atmospheres on the observed properties of stellar spectra
... polilai.hle onl;v, 1 f the obll!e!'Ved ourve follerwe the theoretiolil.l curve f'or radbtive model!!!. closel;v o•HIU' a wide range.[r] ...
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