Stellar Structure
A teaching-learning module on stellar structure and evolution
... Abstract. We present a teaching module focused on stellar structure, functioning and evolution. Drawing from literature in astronomy education, we identified three key ideas which are fundamental in ...
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Renormalized Coordinate Stretching: A Generalization of Shoot and Fit with Application to Stellar Structure
... in stellar structure exemplifies the algorithm and shows that, when used in conjunction with the standard procedure, it has superior convergence compared to the standard one ...
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The Spitzer Survey of Stellar Structure in Galaxies (S4G): Precise Stellar Mass Distributions from Automated Dust Correction at 3.6 μm
... We have developed a pipeline to obtain maps of the fl ux from old stars for the 3.6 m m images in the Spitzer Survey of Stellar Structure in Galaxies ( S 4 G ) . Following two different approaches, Meidt et ...
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Internal rapid rotation and its implications for stellar structure and pulsations
... the structure and evolution of these stars, in particular their chemical evolution and internal transport pro- cesses, is ...on stellar structure, chemical evolution, and ...
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Studies in stellar structure and evolution
... Simon Jeffery A Thesis Submitted for the Degree of PhD at the University of St Andrews.. 1983 Full metadata for this item is available in St Andrews Research Repository at: http://resear[r] ...
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Dynamical Asteroseismology: towards improving the theories of stellar structure and (tidal) evolution
... Fig. 1.—Nitrogen abundance (12 log [N/H]) against the projected rotational velocity ( v sin i ) for (a) core hydrogen burning and (b) supergiant objects. Open symbols, radial velocity variables; downward arrows, ...
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Stellar astrophysics: a study of stellar physics with particular reference to low mass stars
... the stellar interior and envelope there are many physical processes which determine the state of a star and govern its structure and ...the stellar structure is reduced to a one dimensional ...
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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 ...
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Spectroscopic Analysis Of Stellar Rotational Velocity At The Bottom Of The Main Sequence
... There are two primary methods by which v sin i is measured: the cross-correlation technique, and the template-fitting technique (see Section 2.1.2). We tested the cross-correlation technique, but our sample does not ...
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A very bright, very hot, and very long flaring event from the M Dwarf Binary system DG CVn
... and stellar fl ares using smaller stellar fl ares, and demonstrated a rough agreement between solar and stellar fl ares in the relative fraction of radiated energy appearing coronal plasma and that in ...
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Stellar magnetism and activity : from stellar interiors to orbiting exoplanets
... Modern efforts at modelling stellar winds are much improved compared with the earliest mod- els. These improvements have chiefly occurred for two reasons. Firstly, our understanding of the mechanisms by which the ...
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Oscillations in stellar superflares
... of stellar flares show a distinct bump in the flare decay branch of unknown ...any stellar parameter, suggesting that these may be a due to flare loop ...in stellar flare light curves, that flare ...
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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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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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Is stellar multiplicity universal? Tight stellar binaries in the Orion nebula Cluster
... rich stellar cluster and a loose association ...of stellar populations are at the heart of the ongoing debate, but these cannot be easily tested with current observations, which explains why the problem has ...
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Observational clues to the physics at the magnetosphere in young stellar objects
... young stellar cluster NGC 2264 with several satellites (CoRoT, Spitzer, MOST, Chandra) and ground-based facilities (VLT / FLAMES and CFHT / Megacam among others) ...
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The Early History of Stellar Spin: the Theory of Accretion onto Young Stellar Objects
... powered stellar wind carries o ff the accreted disk angular ...the stellar and disk ...powered stellar wind (APSW) exerts a pressure on the surrounding disk wind, which prevents it from collimating ...
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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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Rotation and stellar evolution
... Figure 5 shows the evolution in the HR diagram of 3 M models computed with a solar chemical composition and a solar-calibrated mixing-length parameter. The rotating model has an initial velocity on the ZAMS of 150 km s − ...
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