Results 11 to 20 of about 11,236 (116)
Asteroseismology of pre-main sequence stars [PDF]
Communications in Asteroseismology, 2009 Intermediate-mass pre-main sequence (PMS) stars cross the instability region on their way to the main sequence and can become pulsationally unstable. The δ Scuti-like PMS pulsators populate the same area in the Hertzsprung-Russell (HR) diagram as the classical δ Scuti stars.
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The Effect of Pre–Main‐Sequence Stars on Star Cluster Dynamics [PDF]
The Astrophysical Journal, 2006 We investigate the effects of the addition of pre-main sequence evolution to star cluster simulations. We allowed stars to follow pre-main sequence tracks that begin at the deuterium burning birthline and end at the zero age main sequence. We compared our simulations to ones in which the stars began their lives at the zero age main sequence, and also ...
Wiersma, R. +2 more
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Pulsation in pre-main sequence stars [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractAsteroseismology has been proven to be a successful tool to unravel details of the internal structure for different types of stars in various stages of evolution well after birth. We can now show that it has similar power for pre-main sequence (pre-MS) objects.
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Old pre-main-sequence stars [PDF]
Astronomy & Astrophysics, 2014 Young stars show evidence of accretion discs which evolve quickly and disperse with an e-folding time of $\sim$ 3Myr. This is in striking contrast with recent observations that suggest evidence for numerous $>30$ Myr old stars with an accretion disc in large star-forming complexes.
Scicluna, P +3 more
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The pre-main-sequence star IP Persei [PDF]
Astronomy & Astrophysics, 2001 We present the results of high- and low-resolution spectroscopic and broadband multicolour photometric observations of the emission-line A-type star IP Per. Significant variations of the Balmer line profiles and near-IR brightness are detected.
A. S. Miroshnichenko +6 more
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The Coronal Evolution Of Pre-Main-Sequence Stars
The 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS19), 2016 Contributed talk, plenary session.
Gregory, Scott G. +2 more
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Instability strip for pre-main-sequence stars [PDF]
Communications in Asteroseismology, 2007 We apply the Time Dependent Convection (TDC) treatment presented in Grigahcene et al. (2005) to the study of Pre-main sequence pulsating stars. The stabilization of the p-modes at the red edge of the Instability Strip (IS) is obtained by our models. The theoretical IS obtained with Mixing Length (ML) parameter α =1.8 is compared to observations and a ...
Grigahcene, A. +4 more
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Circumstellar radio emission from pre-main sequence stars [PDF]
Symposium - International Astronomical Union, 1987 VLA radio continuum observations have been obtained for a number of pre-main sequence (PMS) stars in Corona Australis, Lupus, Scorpius and Taurus. A variety of PMS sources were detected and for other stars upper limits to the ionized mass loss rates were determined.
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Clumpy accretion onto pre-main-sequence stars [PDF]
Publications of the Astronomical Society of the Pacific, 1992 Medium-resolution spectroscopic observations covering the range 5150-9100 A are made of five premain-sequence stars in the Corona Australis star-forming region. They are the known variable stars R CrA, S CrA, T CrA, TY CrA, and VV CrA. During the week of observation significant changes, sometimes occurring between successive nights, were observed in ...
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Massive pre-main sequence stars in M17 [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractWe have obtained optical to near-infrared (300-2500 nm) VLT/X-shooter spectra of six candidate mYSOs, deeply embedded in the massive star forming region M17. These mYSO candidates have been identified based on their infrared excess and spectral features (double-peaked emission lines, CO band-head emission) indicating the presence of a disk ...
Maria C. Ramirez-Tannus +3 more
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