Results 1 to 10 of about 11,683 (215)
Pre-main sequence stars in LH 91
Aims. We study the accretion properties of pre-main sequence (PMS) low-mass stars in the LH 91 association within the Large Magellanic Clouds. Methods. Using optical multiband photometry obtained with the Hubble Space Telescope, we identify 75 candidates showing Hα excess emission above the 3σ level with equivalent width EWHα ⩾ 10 Å.
R. Carini +5 more
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Nonradial Oscillations on a Pre–Main‐Sequence Star [PDF]
We show that the modes observed on the pulsating pre-main-sequence (PMS) star NGC 6383 170 can be interpreted as a combination of radial and nonradial p-modes. Using a dense grid of PMS models and oscillation spectra, we have identified models that match the observed oscillation spectrum within 1 σ of the frequency uncertainties and are consistent with
Zwintz, Konstanze +2 more
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Massive pre-main-sequence stars in M17 [PDF]
We obtained VLT/X-shooter spectra of twelve candidate young massive stars previously selected by Hanson et al. (1997) in the giant Hii region M17. An analysis of their spectra using FASTWIND models (Puls et al. 2005) shows that they span a mass range of 6 - 20 M⊙.
Ramirez-Tannus, M.C. +8 more
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Rotation and Activity of Pre–Main‐Sequence Stars [PDF]
40 pages, 8 figures, ApJ, in ...
Scholz, Aleks +3 more
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THE HABITABLE ZONES OF PRE-MAIN-SEQUENCE STARS [PDF]
We calculate the pre-main-sequence HZ for stars of spectral classes F to M. The spatial distribution of liquid water and its change during the pre-main-sequence phase of protoplanetary systems is important in understanding how planets become habitable.
Ramirez, Ramses M., Kaltenegger, Lisa
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The Instability Strip for Pre–main-sequence Stars [PDF]
We investigate the pulsational properties of Pre--Main-Sequence (PMS) stars by means of linear and nonlinear calculations. The equilibrium models were taken from models evolved from the protostellar birthline to the ZAMS for masses in the range 1 to 4 solar masses.
Marconi, M., Palla, F.
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Disks and Halos in Pre-Main-Sequence Stars [PDF]
11 pages, 10 figures.
Vinković, Dejan +3 more
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The Effect of Pre–Main‐Sequence Stars on Star Cluster Dynamics [PDF]
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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Summary of dissertation for the degree of Doctor of Sciences, Dissertation language: Bulgarian, DSc awarded 2023 by the Institute of Astronomy and NAO of the Bulgarian Academy of ...
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The Rotation of Pre-Main Sequence Stars [PDF]
Kraft (1970) obtained the rotational velocities for large numbers of stars located in the field and in clusters of different ages. He noted that (a) among the field stars those stars with strong Call K emission had larger rotational velocities than those without; (b) stars in the Hyades and Pleiades (which are much younger than the field) had both ...
Leonard V. Kuhi, Stuart Vogel
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