Results 51 to 60 of about 241,576 (378)
New pre-main-sequence stars in the Upper Scorpius subgroup of Sco–Cen [PDF]
, 2015 We present 237 new spectroscopically confirmed pre-main-sequence K and M-type stars in the young Upper Scorpius subgroup of the Sco-Cen association, the near- est region of recent massive star formation.
A. Rizzuto, M. Ireland, A. Kraus
semanticscholar +1 more source
NGC 2362: a Template for Early Stellar Evolution [PDF]
, 2001 We present UBVRI photometry for the young open cluster NGC 2362. From analysis of the appropriate color-color and color-magnitude diagrams we derive the fundamental parameters of the NGC 2362 cluster to be: age = 5 (+1-2) Myr, distance = 1480 pc, E(B-V ...
A. Moitinho +7 more
core +2 more sources
, 2023 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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Nonradial Oscillations on a Pre–Main‐Sequence Star [PDF]
The Astrophysical Journal, 2007 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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Disks and Halos in Pre-Main-Sequence Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 11 pages, 10 figures.
Vinković, Dejan +3 more
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Early-type objects in NGC6611 and Eagle Nebula [PDF]
, 2008 An important question about Be stars is whether Be stars are born as Be stars or not. It is necessary to observe young clusters to answer this question. Observations of stars in NGC6611 and the star-formation region of Eagle Nebula have been carried out ...
A. M. Hubert +45 more
core +5 more sources
The theoretical calculation of the Rossby number and the `non-local' convective overturn time for pre-main sequence and early post-main sequence stars [PDF]
, 1995 This paper provides estimates of convective turnover time scales for Sun-like stars in the pre-main sequence and early post-main sequence phases of evolution, based on up-to-date physical input for the stellar models. In this first study, all models have
Yong -Cheol Kim, P. Demarque
semanticscholar +1 more source
A CONSTRAINT ON THE FORMATION TIMESCALE OF THE YOUNG OPEN CLUSTER NGC 2264: LITHIUM ABUNDANCE OF PRE-MAIN SEQUENCE STARS [PDF]
, 2016 The timescale of cluster formation is an essential parameter in order to understand the formation process of star clusters. Pre-main sequence (PMS) stars in nearby young open clusters reveal a large spread in brightness.
B. Lim +5 more
semanticscholar +1 more source
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
openaire +3 more sources