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Browsing by Subject "Stars -- Evolution"
Now showing items 1-20 of 20
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(Halifax, N.S. : Saint Mary's University, 1998)The results of UBV CCD photometry are presented for a newly discovered open cluster, as well as new photometry for thirty-seven members of the open cluster HM 1. The new open cluster, to be designated OCL 1104-610, has a ...
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(American Astronomical Society, 2009-10-20)NGC 2264 is a young open cluster lying above the Galactic plane in which six variable stars have previously been identified as possible pre-main-sequence (PMS) pulsators. Their oscillation spectra are relatively sparse ...
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(Halifax, N.S. : Saint Mary's University, 2007)We investigate in detail the potential of asteroseismology in exploring the structure of intermediate mass (1.6 ≤ M⊙ ≤ 5.0) pre-main sequence stars. It is expected that pre- and post-main sequence ...
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(American Astronomical Society, 2007-04)Core collapse of dense massive star clusters is unavoidable, and this leads to the formation of massive objects, with masses of up to 1000 M[circled dot] and even larger. When these objects become stars, stellar wind mass ...
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(American Astronomical Society, 2002-04)The interior structure, the evolution, and the p-mode oscillation spectra of stellar models between 2.0 and 5 M[subscript circled dot] are presented. Interior details, including convective core and envelope growth and ...
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(EDP Sciences, 2012-05)Context. It was recently discovered that the period spacings of mixed pressure/gravity dipole modes in red giants permit a distinction between the otherwise unknown evolutionary stage of these stars. The Kepler space mission ...
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(American Astronomical Society, 2000-02)Inspired by the observations of low-amplitude oscillations of [alpha] Ursae Majoris A by Buzasi et al. using the WIRE satellite, a grid of stellar evolutionary tracks has been constructed to derive physically consistent ...
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(Halifax, N.S. : Saint Mary's University, 2001)Stellar evolution models and their associated non-radial pulsation spectra are presented for the nearby stars [varepsilon] Eridani (K2 V), β Hydri (G2 IV), β Geminorum (K2 III). This analysis was performed in preparation ...
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(IOP Publishing Limited, 2014-06-01)We compare evolved stellar models, which match Procyon’s mass and position in the HR diagram, to current groundbased asteroseismic observations. Diffusion of helium and metals along with two conventional core overshoot ...
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(Halifax, N.S. : Saint Mary's University, 2004)MacFadyen & Woosley (1999) have studied two models of a hypernova, where a hyper-accreting disk is created in the core of a star. Their code requires an accurate model of local energy loss given by neutrino emission. An ...
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(Royal Astronomical SocietyOxford University Press, 2004)We present a synthetic model for thermally pulsing asymptotic giant branch (TPAGB) evolution constructed by fitting expressions to full evolutionary models in the metallicity range 0.0001 [less than or equal to] Z [less ...
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(Oxford University PressRoyal Astronomical Society, 2019-03)We present the first results of our pilot study of eight photometrically selected Lyman-continuum (LyC) emitting galaxy candidates from the COSMOS field and focus on their optical emission line ratios. Observations were ...
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(The American Astronomical Society, 2014-10)Recently the number of main-sequence and subgiant stars exhibiting solar-like oscillations that are resolved into individual mode frequencies has increased dramatically. While only a few such data sets were available for ...
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(EDP Sciences, 2005-04)In July, 1999, the Hubble Space Telescope (HST) pointed for more than 8 days continuously at the globular cluster 47 Tucanae. Two guide stars were used during this campaign by the Fine Guidance Sensors (FGS). Using more ...
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(American Astronomical Society, 1999-11-01)A grid of stellar evolution models for Procyon A has been calculated. These models include the best physics available to us (including the latest opacities and equation of state) and are based on the revised astrometric ...
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(American Astronomical Society, 1996-01)The p-mode frequencies recently observed by Kjeldsen and coworkers, along with other observables, are used to determine the mass, age, and helium abundance of [eta] Bootis. We show, by direct application, how the p-model ...
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(American Astronomical Society, 2007-12)Nonradial p-mode oscillation spectra, computed from a dense grid of pre-main-sequence models, are fit to observed oscillation spectra of several stars in the young cluster NGC 6530. The five stars we consider, all previously ...
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(American Astronomical SocietyIOP PUblishing, 2006-01-10)The space telescope MOST is now providing us with extremely accurate low-frequency p-mode oscillation data for the star [eta] Boo.We demonstrate in this paper that these data, when combined with ground-based measurements ...
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(American Astronomical Society, 2006-05-20)We present new rates for the [superscript 22]Ne([alpha], n)[superscript 25]Mg and [superscript 22]Ne([alpha], [gamma])[superscript 26]Mg reactions, with uncertainties that have been considerably reduced compared to previous ...
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(Springer Science+Business Media B.V., 2008-08)The stellar evolution code YREC is outlined with emphasis on its applications to helio- and asteroseismology. The procedure for calculating calibrated solar and stellar models is described. Other features of the code such ...
Now showing items 1-20 of 20